Java Code Examples for com.handmark.pulltorefresh.library.PullToRefreshBase.Mode#permitsPullToRefresh()

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Example 1
Source File: OverscrollHelper.java    From Social with Apache License 2.0 4 votes vote down vote up
/**
 * Helper method for Overscrolling that encapsulates all of the necessary
 * function. This is the advanced version of the call.
 * 
 * @param view - PullToRefreshView that is calling this.
 * @param deltaX - Change in X in pixels, passed through from from
 *            overScrollBy call
 * @param scrollX - Current X scroll value in pixels before applying deltaY,
 *            passed through from from overScrollBy call
 * @param deltaY - Change in Y in pixels, passed through from from
 *            overScrollBy call
 * @param scrollY - Current Y scroll value in pixels before applying deltaY,
 *            passed through from from overScrollBy call
 * @param scrollRange - Scroll Range of the View, specifically needed for
 *            ScrollView
 * @param fuzzyThreshold - Threshold for which the values how fuzzy we
 *            should treat the other values. Needed for WebView as it
 *            doesn't always scroll back to it's edge. 0 = no fuzziness.
 * @param scaleFactor - Scale Factor for overscroll amount
 * @param isTouchEvent - true if this scroll operation is the result of a
 *            touch event, passed through from from overScrollBy call
 */
public static void overScrollBy(final PullToRefreshBase<?> view, final int deltaX, final int scrollX,
		final int deltaY, final int scrollY, final int scrollRange, final int fuzzyThreshold,
		final float scaleFactor, final boolean isTouchEvent) {

	final int deltaValue, currentScrollValue, scrollValue;
	switch (view.getPullToRefreshScrollDirection()) {
		case HORIZONTAL:
			deltaValue = deltaX;
			scrollValue = scrollX;
			currentScrollValue = view.getScrollX();
			break;
		case VERTICAL:
		default:
			deltaValue = deltaY;
			scrollValue = scrollY;
			currentScrollValue = view.getScrollY();
			break;
	}

	// Check that OverScroll is enabled and that we're not currently
	// refreshing.
	if (view.isPullToRefreshOverScrollEnabled() && !view.isRefreshing()) {
		final Mode mode = view.getMode();

		// Check that Pull-to-Refresh is enabled, and the event isn't from
		// touch
		if (mode.permitsPullToRefresh() && !isTouchEvent && deltaValue != 0) {
			final int newScrollValue = (deltaValue + scrollValue);

			if (PullToRefreshBase.DEBUG) {
				Log.d(LOG_TAG, "OverScroll. DeltaX: " + deltaX + ", ScrollX: " + scrollX + ", DeltaY: " + deltaY
						+ ", ScrollY: " + scrollY + ", NewY: " + newScrollValue + ", ScrollRange: " + scrollRange
						+ ", CurrentScroll: " + currentScrollValue);
			}

			if (newScrollValue < (0 - fuzzyThreshold)) {
				// Check the mode supports the overscroll direction, and
				// then move scroll
				if (mode.showHeaderLoadingLayout()) {
					// If we're currently at zero, we're about to start
					// overscrolling, so change the state
					if (currentScrollValue == 0) {
						view.setState(State.OVERSCROLLING);
					}

					view.setHeaderScroll((int) (scaleFactor * (currentScrollValue + newScrollValue)));
				}
			} else if (newScrollValue > (scrollRange + fuzzyThreshold)) {
				// Check the mode supports the overscroll direction, and
				// then move scroll
				if (mode.showFooterLoadingLayout()) {
					// If we're currently at zero, we're about to start
					// overscrolling, so change the state
					if (currentScrollValue == 0) {
						view.setState(State.OVERSCROLLING);
					}

					view.setHeaderScroll((int) (scaleFactor * (currentScrollValue + newScrollValue - scrollRange)));
				}
			} else if (Math.abs(newScrollValue) <= fuzzyThreshold
					|| Math.abs(newScrollValue - scrollRange) <= fuzzyThreshold) {
				// Means we've stopped overscrolling, so scroll back to 0
				view.setState(State.RESET);
			}
		} else if (isTouchEvent && State.OVERSCROLLING == view.getState()) {
			// This condition means that we were overscrolling from a fling,
			// but the user has touched the View and is now overscrolling
			// from touch instead. We need to just reset.
			view.setState(State.RESET);
		}
	}
}
 
Example 2
Source File: OverscrollHelper.java    From sctalk with Apache License 2.0 4 votes vote down vote up
/**
 * Helper method for Overscrolling that encapsulates all of the necessary
 * function. This is the advanced version of the call.
 * 
 * @param view - PullToRefreshView that is calling this.
 * @param deltaX - Change in X in pixels, passed through from from
 *            overScrollBy call
 * @param scrollX - Current X scroll value in pixels before applying deltaY,
 *            passed through from from overScrollBy call
 * @param deltaY - Change in Y in pixels, passed through from from
 *            overScrollBy call
 * @param scrollY - Current Y scroll value in pixels before applying deltaY,
 *            passed through from from overScrollBy call
 * @param scrollRange - Scroll Range of the View, specifically needed for
 *            ScrollView
 * @param fuzzyThreshold - Threshold for which the values how fuzzy we
 *            should treat the other values. Needed for WebView as it
 *            doesn't always scroll back to it's edge. 0 = no fuzziness.
 * @param scaleFactor - Scale Factor for overscroll amount
 * @param isTouchEvent - true if this scroll operation is the result of a
 *            touch event, passed through from from overScrollBy call
 */
public static void overScrollBy(final PullToRefreshBase<?> view, final int deltaX, final int scrollX,
		final int deltaY, final int scrollY, final int scrollRange, final int fuzzyThreshold,
		final float scaleFactor, final boolean isTouchEvent) {

	final int deltaValue, currentScrollValue, scrollValue;
	switch (view.getPullToRefreshScrollDirection()) {
		case HORIZONTAL:
			deltaValue = deltaX;
			scrollValue = scrollX;
			currentScrollValue = view.getScrollX();
			break;
		case VERTICAL:
		default:
			deltaValue = deltaY;
			scrollValue = scrollY;
			currentScrollValue = view.getScrollY();
			break;
	}

	// Check that OverScroll is enabled and that we're not currently
	// refreshing.
	if (view.isPullToRefreshOverScrollEnabled() && !view.isRefreshing()) {
		final Mode mode = view.getMode();

		// Check that Pull-to-Refresh is enabled, and the event isn't from
		// touch
		if (mode.permitsPullToRefresh() && !isTouchEvent && deltaValue != 0) {
			final int newScrollValue = (deltaValue + scrollValue);

			if (PullToRefreshBase.DEBUG) {
				Log.d(LOG_TAG, "OverScroll. DeltaX: " + deltaX + ", ScrollX: " + scrollX + ", DeltaY: " + deltaY
						+ ", ScrollY: " + scrollY + ", NewY: " + newScrollValue + ", ScrollRange: " + scrollRange
						+ ", CurrentScroll: " + currentScrollValue);
			}

			if (newScrollValue < (0 - fuzzyThreshold)) {
				// Check the mode supports the overscroll direction, and
				// then move scroll
				if (mode.showHeaderLoadingLayout()) {
					// If we're currently at zero, we're about to start
					// overscrolling, so change the state
					if (currentScrollValue == 0) {
						view.setState(State.OVERSCROLLING);
					}

					view.setHeaderScroll((int) (scaleFactor * (currentScrollValue + newScrollValue)));
				}
			} else if (newScrollValue > (scrollRange + fuzzyThreshold)) {
				// Check the mode supports the overscroll direction, and
				// then move scroll
				if (mode.showFooterLoadingLayout()) {
					// If we're currently at zero, we're about to start
					// overscrolling, so change the state
					if (currentScrollValue == 0) {
						view.setState(State.OVERSCROLLING);
					}

					view.setHeaderScroll((int) (scaleFactor * (currentScrollValue + newScrollValue - scrollRange)));
				}
			} else if (Math.abs(newScrollValue) <= fuzzyThreshold
					|| Math.abs(newScrollValue - scrollRange) <= fuzzyThreshold) {
				// Means we've stopped overscrolling, so scroll back to 0
				view.setState(State.RESET);
			}
		} else if (isTouchEvent && State.OVERSCROLLING == view.getState()) {
			// This condition means that we were overscrolling from a fling,
			// but the user has touched the View and is now overscrolling
			// from touch instead. We need to just reset.
			view.setState(State.RESET);
		}
	}
}
 
Example 3
Source File: OverscrollHelper.java    From BigApp_Discuz_Android with Apache License 2.0 4 votes vote down vote up
/**
 * Helper method for Overscrolling that encapsulates all of the necessary
 * function. This is the advanced version of the call.
 * 
 * @param view - PullToRefreshView that is calling this.
 * @param deltaX - Change in X in pixels, passed through from from
 *            overScrollBy call
 * @param scrollX - Current X scroll value in pixels before applying deltaY,
 *            passed through from from overScrollBy call
 * @param deltaY - Change in Y in pixels, passed through from from
 *            overScrollBy call
 * @param scrollY - Current Y scroll value in pixels before applying deltaY,
 *            passed through from from overScrollBy call
 * @param scrollRange - Scroll Range of the View, specifically needed for
 *            ScrollView
 * @param fuzzyThreshold - Threshold for which the values how fuzzy we
 *            should treat the other values. Needed for WebView as it
 *            doesn't always scroll back to it's edge. 0 = no fuzziness.
 * @param scaleFactor - Scale Factor for overscroll amount
 * @param isTouchEvent - true if this scroll operation is the result of a
 *            touch event, passed through from from overScrollBy call
 */
public static void overScrollBy(final PullToRefreshBase<?> view, final int deltaX, final int scrollX,
		final int deltaY, final int scrollY, final int scrollRange, final int fuzzyThreshold,
		final float scaleFactor, final boolean isTouchEvent) {

	final int deltaValue, currentScrollValue, scrollValue;
	switch (view.getPullToRefreshScrollDirection()) {
		case HORIZONTAL:
			deltaValue = deltaX;
			scrollValue = scrollX;
			currentScrollValue = view.getScrollX();
			break;
		case VERTICAL:
		default:
			deltaValue = deltaY;
			scrollValue = scrollY;
			currentScrollValue = view.getScrollY();
			break;
	}

	// Check that OverScroll is enabled and that we're not currently
	// refreshing.
	if (view.isPullToRefreshOverScrollEnabled() && !view.isRefreshing()) {
		final Mode mode = view.getMode();

		// Check that Pull-to-Refresh is enabled, and the event isn't from
		// touch
		if (mode.permitsPullToRefresh() && !isTouchEvent && deltaValue != 0) {
			final int newScrollValue = (deltaValue + scrollValue);

			if (PullToRefreshBase.DEBUG) {
				Log.d(LOG_TAG, "OverScroll. DeltaX: " + deltaX + ", ScrollX: " + scrollX + ", DeltaY: " + deltaY
						+ ", ScrollY: " + scrollY + ", NewY: " + newScrollValue + ", ScrollRange: " + scrollRange
						+ ", CurrentScroll: " + currentScrollValue);
			}

			if (newScrollValue < (0 - fuzzyThreshold)) {
				// Check the mode supports the overscroll direction, and
				// then move scroll
				if (mode.showHeaderLoadingLayout()) {
					// If we're currently at zero, we're about to start
					// overscrolling, so change the state
					if (currentScrollValue == 0) {
						view.setState(State.OVERSCROLLING);
					}

					view.setHeaderScroll((int) (scaleFactor * (currentScrollValue + newScrollValue)));
				}
			} else if (newScrollValue > (scrollRange + fuzzyThreshold)) {
				// Check the mode supports the overscroll direction, and
				// then move scroll
				if (mode.showFooterLoadingLayout()) {
					// If we're currently at zero, we're about to start
					// overscrolling, so change the state
					if (currentScrollValue == 0) {
						view.setState(State.OVERSCROLLING);
					}

					view.setHeaderScroll((int) (scaleFactor * (currentScrollValue + newScrollValue - scrollRange)));
				}
			} else if (Math.abs(newScrollValue) <= fuzzyThreshold
					|| Math.abs(newScrollValue - scrollRange) <= fuzzyThreshold) {
				// Means we've stopped overscrolling, so scroll back to 0
				view.setState(State.RESET);
			}
		} else if (isTouchEvent && State.OVERSCROLLING == view.getState()) {
			// This condition means that we were overscrolling from a fling,
			// but the user has touched the View and is now overscrolling
			// from touch instead. We need to just reset.
			view.setState(State.RESET);
		}
	}
}
 
Example 4
Source File: OverscrollHelper.java    From FanXin-based-HuanXin with GNU General Public License v2.0 4 votes vote down vote up
/**
 * Helper method for Overscrolling that encapsulates all of the necessary
 * function. This is the advanced version of the call.
 * 
 * @param view - PullToRefreshView that is calling this.
 * @param deltaX - Change in X in pixels, passed through from from
 *            overScrollBy call
 * @param scrollX - Current X scroll value in pixels before applying deltaY,
 *            passed through from from overScrollBy call
 * @param deltaY - Change in Y in pixels, passed through from from
 *            overScrollBy call
 * @param scrollY - Current Y scroll value in pixels before applying deltaY,
 *            passed through from from overScrollBy call
 * @param scrollRange - Scroll Range of the View, specifically needed for
 *            ScrollView
 * @param fuzzyThreshold - Threshold for which the values how fuzzy we
 *            should treat the other values. Needed for WebView as it
 *            doesn't always scroll back to it's edge. 0 = no fuzziness.
 * @param scaleFactor - Scale Factor for overscroll amount
 * @param isTouchEvent - true if this scroll operation is the result of a
 *            touch event, passed through from from overScrollBy call
 */
public static void overScrollBy(final PullToRefreshBase<?> view, final int deltaX, final int scrollX,
		final int deltaY, final int scrollY, final int scrollRange, final int fuzzyThreshold,
		final float scaleFactor, final boolean isTouchEvent) {

	final int deltaValue, currentScrollValue, scrollValue;
	switch (view.getPullToRefreshScrollDirection()) {
		case HORIZONTAL:
			deltaValue = deltaX;
			scrollValue = scrollX;
			currentScrollValue = view.getScrollX();
			break;
		case VERTICAL:
		default:
			deltaValue = deltaY;
			scrollValue = scrollY;
			currentScrollValue = view.getScrollY();
			break;
	}

	// Check that OverScroll is enabled and that we're not currently
	// refreshing.
	if (view.isPullToRefreshOverScrollEnabled() && !view.isRefreshing()) {
		final Mode mode = view.getMode();

		// Check that Pull-to-Refresh is enabled, and the event isn't from
		// touch
		if (mode.permitsPullToRefresh() && !isTouchEvent && deltaValue != 0) {
			final int newScrollValue = (deltaValue + scrollValue);

			if (PullToRefreshBase.DEBUG) {
				Log.d(LOG_TAG, "OverScroll. DeltaX: " + deltaX + ", ScrollX: " + scrollX + ", DeltaY: " + deltaY
						+ ", ScrollY: " + scrollY + ", NewY: " + newScrollValue + ", ScrollRange: " + scrollRange
						+ ", CurrentScroll: " + currentScrollValue);
			}

			if (newScrollValue < (0 - fuzzyThreshold)) {
				// Check the mode supports the overscroll direction, and
				// then move scroll
				if (mode.showHeaderLoadingLayout()) {
					// If we're currently at zero, we're about to start
					// overscrolling, so change the state
					if (currentScrollValue == 0) {
						view.setState(State.OVERSCROLLING);
					}

					view.setHeaderScroll((int) (scaleFactor * (currentScrollValue + newScrollValue)));
				}
			} else if (newScrollValue > (scrollRange + fuzzyThreshold)) {
				// Check the mode supports the overscroll direction, and
				// then move scroll
				if (mode.showFooterLoadingLayout()) {
					// If we're currently at zero, we're about to start
					// overscrolling, so change the state
					if (currentScrollValue == 0) {
						view.setState(State.OVERSCROLLING);
					}

					view.setHeaderScroll((int) (scaleFactor * (currentScrollValue + newScrollValue - scrollRange)));
				}
			} else if (Math.abs(newScrollValue) <= fuzzyThreshold
					|| Math.abs(newScrollValue - scrollRange) <= fuzzyThreshold) {
				// Means we've stopped overscrolling, so scroll back to 0
				view.setState(State.RESET);
			}
		} else if (isTouchEvent && State.OVERSCROLLING == view.getState()) {
			// This condition means that we were overscrolling from a fling,
			// but the user has touched the View and is now overscrolling
			// from touch instead. We need to just reset.
			view.setState(State.RESET);
		}
	}
}
 
Example 5
Source File: OverscrollHelper.java    From LbaizxfPulltoRefresh with Apache License 2.0 4 votes vote down vote up
/**
 * Helper method for Overscrolling that encapsulates all of the necessary
 * function. This is the advanced version of the call.
 * 
 * @param view - PullToRefreshView that is calling this.
 * @param deltaX - Change in X in pixels, passed through from from
 *            overScrollBy call
 * @param scrollX - Current X scroll value in pixels before applying deltaY,
 *            passed through from from overScrollBy call
 * @param deltaY - Change in Y in pixels, passed through from from
 *            overScrollBy call
 * @param scrollY - Current Y scroll value in pixels before applying deltaY,
 *            passed through from from overScrollBy call
 * @param scrollRange - Scroll Range of the View, specifically needed for
 *            ScrollView
 * @param fuzzyThreshold - Threshold for which the values how fuzzy we
 *            should treat the other values. Needed for WebView as it
 *            doesn't always scroll back to it's edge. 0 = no fuzziness.
 * @param scaleFactor - Scale Factor for overscroll amount
 * @param isTouchEvent - true if this scroll operation is the result of a
 *            touch event, passed through from from overScrollBy call
 */
public static void overScrollBy(final PullToRefreshBase<?> view, final int deltaX, final int scrollX,
		final int deltaY, final int scrollY, final int scrollRange, final int fuzzyThreshold,
		final float scaleFactor, final boolean isTouchEvent) {

	final int deltaValue, currentScrollValue, scrollValue;
	switch (view.getPullToRefreshScrollDirection()) {
		case HORIZONTAL:
			deltaValue = deltaX;
			scrollValue = scrollX;
			currentScrollValue = view.getScrollX();
			break;
		case VERTICAL:
		default:
			deltaValue = deltaY;
			scrollValue = scrollY;
			currentScrollValue = view.getScrollY();
			break;
	}

	// Check that OverScroll is enabled and that we're not currently
	// refreshing.
	if (view.isPullToRefreshOverScrollEnabled() && !view.isRefreshing()) {
		final Mode mode = view.getMode();

		// Check that Pull-to-Refresh is enabled, and the event isn't from
		// touch
		if (mode.permitsPullToRefresh() && !isTouchEvent && deltaValue != 0) {
			final int newScrollValue = (deltaValue + scrollValue);

			if (PullToRefreshBase.DEBUG) {
				Log.d(LOG_TAG, "OverScroll. DeltaX: " + deltaX + ", ScrollX: " + scrollX + ", DeltaY: " + deltaY
						+ ", ScrollY: " + scrollY + ", NewY: " + newScrollValue + ", ScrollRange: " + scrollRange
						+ ", CurrentScroll: " + currentScrollValue);
			}

			if (newScrollValue < (0 - fuzzyThreshold)) {
				// Check the mode supports the overscroll direction, and
				// then move scroll
				if (mode.showHeaderLoadingLayout()) {
					// If we're currently at zero, we're about to start
					// overscrolling, so change the state
					if (currentScrollValue == 0) {
						view.setState(State.OVERSCROLLING);
					}

					view.setHeaderScroll((int) (scaleFactor * (currentScrollValue + newScrollValue)));
				}
			} else if (newScrollValue > (scrollRange + fuzzyThreshold)) {
				// Check the mode supports the overscroll direction, and
				// then move scroll
				if (mode.showFooterLoadingLayout()) {
					// If we're currently at zero, we're about to start
					// overscrolling, so change the state
					if (currentScrollValue == 0) {
						view.setState(State.OVERSCROLLING);
					}

					view.setHeaderScroll((int) (scaleFactor * (currentScrollValue + newScrollValue - scrollRange)));
				}
			} else if (Math.abs(newScrollValue) <= fuzzyThreshold
					|| Math.abs(newScrollValue - scrollRange) <= fuzzyThreshold) {
				// Means we've stopped overscrolling, so scroll back to 0
				view.setState(State.RESET);
			}
		} else if (isTouchEvent && State.OVERSCROLLING == view.getState()) {
			// This condition means that we were overscrolling from a fling,
			// but the user has touched the View and is now overscrolling
			// from touch instead. We need to just reset.
			view.setState(State.RESET);
		}
	}
}
 
Example 6
Source File: OverscrollHelper.java    From GifAssistant with Apache License 2.0 4 votes vote down vote up
/**
 * Helper method for Overscrolling that encapsulates all of the necessary
 * function. This is the advanced version of the call.
 * 
 * @param view - PullToRefreshView that is calling this.
 * @param deltaX - Change in X in pixels, passed through from from
 *            overScrollBy call
 * @param scrollX - Current X scroll value in pixels before applying deltaY,
 *            passed through from from overScrollBy call
 * @param deltaY - Change in Y in pixels, passed through from from
 *            overScrollBy call
 * @param scrollY - Current Y scroll value in pixels before applying deltaY,
 *            passed through from from overScrollBy call
 * @param scrollRange - Scroll Range of the View, specifically needed for
 *            ScrollView
 * @param fuzzyThreshold - Threshold for which the values how fuzzy we
 *            should treat the other values. Needed for WebView as it
 *            doesn't always scroll back to it's edge. 0 = no fuzziness.
 * @param scaleFactor - Scale Factor for overscroll amount
 * @param isTouchEvent - true if this scroll operation is the result of a
 *            touch event, passed through from from overScrollBy call
 */
public static void overScrollBy(final PullToRefreshBase<?> view, final int deltaX, final int scrollX,
		final int deltaY, final int scrollY, final int scrollRange, final int fuzzyThreshold,
		final float scaleFactor, final boolean isTouchEvent) {

	final int deltaValue, currentScrollValue, scrollValue;
	switch (view.getPullToRefreshScrollDirection()) {
		case HORIZONTAL:
			deltaValue = deltaX;
			scrollValue = scrollX;
			currentScrollValue = view.getScrollX();
			break;
		case VERTICAL:
		default:
			deltaValue = deltaY;
			scrollValue = scrollY;
			currentScrollValue = view.getScrollY();
			break;
	}

	// Check that OverScroll is enabled and that we're not currently
	// refreshing.
	if (view.isPullToRefreshOverScrollEnabled() && !view.isRefreshing()) {
		final Mode mode = view.getMode();

		// Check that Pull-to-Refresh is enabled, and the event isn't from
		// touch
		if (mode.permitsPullToRefresh() && !isTouchEvent && deltaValue != 0) {
			final int newScrollValue = (deltaValue + scrollValue);

			if (PullToRefreshBase.DEBUG) {
				Log.d(LOG_TAG, "OverScroll. DeltaX: " + deltaX + ", ScrollX: " + scrollX + ", DeltaY: " + deltaY
						+ ", ScrollY: " + scrollY + ", NewY: " + newScrollValue + ", ScrollRange: " + scrollRange
						+ ", CurrentScroll: " + currentScrollValue);
			}

			if (newScrollValue < (0 - fuzzyThreshold)) {
				// Check the mode supports the overscroll direction, and
				// then move scroll
				if (mode.showHeaderLoadingLayout()) {
					// If we're currently at zero, we're about to start
					// overscrolling, so change the state
					if (currentScrollValue == 0) {
						view.setState(State.OVERSCROLLING);
					}

					view.setHeaderScroll((int) (scaleFactor * (currentScrollValue + newScrollValue)));
				}
			} else if (newScrollValue > (scrollRange + fuzzyThreshold)) {
				// Check the mode supports the overscroll direction, and
				// then move scroll
				if (mode.showFooterLoadingLayout()) {
					// If we're currently at zero, we're about to start
					// overscrolling, so change the state
					if (currentScrollValue == 0) {
						view.setState(State.OVERSCROLLING);
					}

					view.setHeaderScroll((int) (scaleFactor * (currentScrollValue + newScrollValue - scrollRange)));
				}
			} else if (Math.abs(newScrollValue) <= fuzzyThreshold
					|| Math.abs(newScrollValue - scrollRange) <= fuzzyThreshold) {
				// Means we've stopped overscrolling, so scroll back to 0
				view.setState(State.RESET);
			}
		} else if (isTouchEvent && State.OVERSCROLLING == view.getState()) {
			// This condition means that we were overscrolling from a fling,
			// but the user has touched the View and is now overscrolling
			// from touch instead. We need to just reset.
			view.setState(State.RESET);
		}
	}
}
 
Example 7
Source File: OverscrollHelper.java    From PullToRefreshLibrary with Apache License 2.0 4 votes vote down vote up
/**
 * Helper method for Overscrolling that encapsulates all of the necessary
 * function. This is the advanced version of the call.
 * 
 * @param view - PullToRefreshView that is calling this.
 * @param deltaX - Change in X in pixels, passed through from from
 *            overScrollBy call
 * @param scrollX - Current X scroll value in pixels before applying deltaY,
 *            passed through from from overScrollBy call
 * @param deltaY - Change in Y in pixels, passed through from from
 *            overScrollBy call
 * @param scrollY - Current Y scroll value in pixels before applying deltaY,
 *            passed through from from overScrollBy call
 * @param scrollRange - Scroll Range of the View, specifically needed for
 *            ScrollView
 * @param fuzzyThreshold - Threshold for which the values how fuzzy we
 *            should treat the other values. Needed for WebView as it
 *            doesn't always scroll back to it's edge. 0 = no fuzziness.
 * @param scaleFactor - Scale Factor for overscroll amount
 * @param isTouchEvent - true if this scroll operation is the result of a
 *            touch event, passed through from from overScrollBy call
 */
public static void overScrollBy(final PullToRefreshBase<?> view, final int deltaX, final int scrollX,
		final int deltaY, final int scrollY, final int scrollRange, final int fuzzyThreshold,
		final float scaleFactor, final boolean isTouchEvent) {

	final int deltaValue, currentScrollValue, scrollValue;
	switch (view.getPullToRefreshScrollDirection()) {
		case HORIZONTAL:
			deltaValue = deltaX;
			scrollValue = scrollX;
			currentScrollValue = view.getScrollX();
			break;
		case VERTICAL:
		default:
			deltaValue = deltaY;
			scrollValue = scrollY;
			currentScrollValue = view.getScrollY();
			break;
	}

	// Check that OverScroll is enabled and that we're not currently
	// refreshing.
	if (view.isPullToRefreshOverScrollEnabled() && !view.isRefreshing()) {
		final Mode mode = view.getMode();

		// Check that Pull-to-Refresh is enabled, and the event isn't from
		// touch
		if (mode.permitsPullToRefresh() && !isTouchEvent && deltaValue != 0) {
			final int newScrollValue = (deltaValue + scrollValue);

			if (PullToRefreshBase.DEBUG) {
				Log.d(LOG_TAG, "OverScroll. DeltaX: " + deltaX + ", ScrollX: " + scrollX + ", DeltaY: " + deltaY
						+ ", ScrollY: " + scrollY + ", NewY: " + newScrollValue + ", ScrollRange: " + scrollRange
						+ ", CurrentScroll: " + currentScrollValue);
			}

			if (newScrollValue < (0 - fuzzyThreshold)) {
				// Check the mode supports the overscroll direction, and
				// then move scroll
				if (mode.showHeaderLoadingLayout()) {
					// If we're currently at zero, we're about to start
					// overscrolling, so change the state
					if (currentScrollValue == 0) {
						view.setState(State.OVERSCROLLING);
					}

					view.setHeaderScroll((int) (scaleFactor * (currentScrollValue + newScrollValue)));
				}
			} else if (newScrollValue > (scrollRange + fuzzyThreshold)) {
				// Check the mode supports the overscroll direction, and
				// then move scroll
				if (mode.showFooterLoadingLayout()) {
					// If we're currently at zero, we're about to start
					// overscrolling, so change the state
					if (currentScrollValue == 0) {
						view.setState(State.OVERSCROLLING);
					}

					view.setHeaderScroll((int) (scaleFactor * (currentScrollValue + newScrollValue - scrollRange)));
				}
			} else if (Math.abs(newScrollValue) <= fuzzyThreshold
					|| Math.abs(newScrollValue - scrollRange) <= fuzzyThreshold) {
				// Means we've stopped overscrolling, so scroll back to 0
				view.setState(State.RESET);
			}
		} else if (isTouchEvent && State.OVERSCROLLING == view.getState()) {
			// This condition means that we were overscrolling from a fling,
			// but the user has touched the View and is now overscrolling
			// from touch instead. We need to just reset.
			view.setState(State.RESET);
		}
	}
}
 
Example 8
Source File: OverscrollHelper.java    From SweetMusicPlayer with Apache License 2.0 4 votes vote down vote up
/**
 * Helper method for Overscrolling that encapsulates all of the necessary
 * function. This is the advanced version of the call.
 * 
 * @param view - PullToRefreshView that is calling this.
 * @param deltaX - Change in X in pixels, passed through from from
 *            overScrollBy call
 * @param scrollX - Current X scroll value in pixels before applying deltaY,
 *            passed through from from overScrollBy call
 * @param deltaY - Change in Y in pixels, passed through from from
 *            overScrollBy call
 * @param scrollY - Current Y scroll value in pixels before applying deltaY,
 *            passed through from from overScrollBy call
 * @param scrollRange - Scroll Range of the View, specifically needed for
 *            ScrollView
 * @param fuzzyThreshold - Threshold for which the values how fuzzy we
 *            should treat the other values. Needed for WebView as it
 *            doesn't always scroll back to it's edge. 0 = no fuzziness.
 * @param scaleFactor - Scale Factor for overscroll amount
 * @param isTouchEvent - true if this scroll operation is the result of a
 *            touch event, passed through from from overScrollBy call
 */
public static void overScrollBy(final PullToRefreshBase<?> view, final int deltaX, final int scrollX,
		final int deltaY, final int scrollY, final int scrollRange, final int fuzzyThreshold,
		final float scaleFactor, final boolean isTouchEvent) {

	final int deltaValue, currentScrollValue, scrollValue;
	switch (view.getPullToRefreshScrollDirection()) {
		case HORIZONTAL:
			deltaValue = deltaX;
			scrollValue = scrollX;
			currentScrollValue = view.getScrollX();
			break;
		case VERTICAL:
		default:
			deltaValue = deltaY;
			scrollValue = scrollY;
			currentScrollValue = view.getScrollY();
			break;
	}

	// Check that OverScroll is enabled and that we're not currently
	// refreshing.
	if (view.isPullToRefreshOverScrollEnabled() && !view.isRefreshing()) {
		final Mode mode = view.getMode();

		// Check that Pull-to-Refresh is enabled, and the event isn't from
		// touch
		if (mode.permitsPullToRefresh() && !isTouchEvent && deltaValue != 0) {
			final int newScrollValue = (deltaValue + scrollValue);

			if (PullToRefreshBase.DEBUG) {
				Log.d(LOG_TAG, "OverScroll. DeltaX: " + deltaX + ", ScrollX: " + scrollX + ", DeltaY: " + deltaY
						+ ", ScrollY: " + scrollY + ", NewY: " + newScrollValue + ", ScrollRange: " + scrollRange
						+ ", CurrentScroll: " + currentScrollValue);
			}

			if (newScrollValue < (0 - fuzzyThreshold)) {
				// Check the mode supports the overscroll direction, and
				// then move scroll
				if (mode.showHeaderLoadingLayout()) {
					// If we're currently at zero, we're about to start
					// overscrolling, so change the state
					if (currentScrollValue == 0) {
						view.setState(State.OVERSCROLLING);
					}

					view.setHeaderScroll((int) (scaleFactor * (currentScrollValue + newScrollValue)));
				}
			} else if (newScrollValue > (scrollRange + fuzzyThreshold)) {
				// Check the mode supports the overscroll direction, and
				// then move scroll
				if (mode.showFooterLoadingLayout()) {
					// If we're currently at zero, we're about to start
					// overscrolling, so change the state
					if (currentScrollValue == 0) {
						view.setState(State.OVERSCROLLING);
					}

					view.setHeaderScroll((int) (scaleFactor * (currentScrollValue + newScrollValue - scrollRange)));
				}
			} else if (Math.abs(newScrollValue) <= fuzzyThreshold
					|| Math.abs(newScrollValue - scrollRange) <= fuzzyThreshold) {
				// Means we've stopped overscrolling, so scroll back to 0
				view.setState(State.RESET);
			}
		} else if (isTouchEvent && State.OVERSCROLLING == view.getState()) {
			// This condition means that we were overscrolling from a fling,
			// but the user has touched the View and is now overscrolling
			// from touch instead. We need to just reset.
			view.setState(State.RESET);
		}
	}
}
 
Example 9
Source File: OverscrollHelper.java    From ONE-Unofficial with Apache License 2.0 4 votes vote down vote up
/**
 * Helper method for Overscrolling that encapsulates all of the necessary
 * function. This is the advanced version of the call.
 * 
 * @param view - PullToRefreshView that is calling this.
 * @param deltaX - Change in X in pixels, passed through from from
 *            overScrollBy call
 * @param scrollX - Current X scroll value in pixels before applying deltaY,
 *            passed through from from overScrollBy call
 * @param deltaY - Change in Y in pixels, passed through from from
 *            overScrollBy call
 * @param scrollY - Current Y scroll value in pixels before applying deltaY,
 *            passed through from from overScrollBy call
 * @param scrollRange - Scroll Range of the View, specifically needed for
 *            ScrollView
 * @param fuzzyThreshold - Threshold for which the values how fuzzy we
 *            should treat the other values. Needed for WebView as it
 *            doesn't always scroll back to it's edge. 0 = no fuzziness.
 * @param scaleFactor - Scale Factor for overscroll amount
 * @param isTouchEvent - true if this scroll operation is the result of a
 *            touch event, passed through from from overScrollBy call
 */
public static void overScrollBy(final PullToRefreshBase<?> view, final int deltaX, final int scrollX,
		final int deltaY, final int scrollY, final int scrollRange, final int fuzzyThreshold,
		final float scaleFactor, final boolean isTouchEvent) {

	final int deltaValue, currentScrollValue, scrollValue;
	switch (view.getPullToRefreshScrollDirection()) {
		case HORIZONTAL:
			deltaValue = deltaX;
			scrollValue = scrollX;
			currentScrollValue = view.getScrollX();
			break;
		case VERTICAL:
		default:
			deltaValue = deltaY;
			scrollValue = scrollY;
			currentScrollValue = view.getScrollY();
			break;
	}

	// Check that OverScroll is enabled and that we're not currently
	// refreshing.
	if (view.isPullToRefreshOverScrollEnabled() && !view.isRefreshing()) {
		final Mode mode = view.getMode();

		// Check that Pull-to-Refresh is enabled, and the event isn't from
		// touch
		if (mode.permitsPullToRefresh() && !isTouchEvent && deltaValue != 0) {
			final int newScrollValue = (deltaValue + scrollValue);

			if (PullToRefreshBase.DEBUG) {
				Log.d(LOG_TAG, "OverScroll. DeltaX: " + deltaX + ", ScrollX: " + scrollX + ", DeltaY: " + deltaY
						+ ", ScrollY: " + scrollY + ", NewY: " + newScrollValue + ", ScrollRange: " + scrollRange
						+ ", CurrentScroll: " + currentScrollValue);
			}

			if (newScrollValue < (0 - fuzzyThreshold)) {
				// Check the mode supports the overscroll direction, and
				// then move scroll
				if (mode.showHeaderLoadingLayout()) {
					// If we're currently at zero, we're about to start
					// overscrolling, so change the state
					if (currentScrollValue == 0) {
						view.setState(State.OVERSCROLLING);
					}

					view.setHeaderScroll((int) (scaleFactor * (currentScrollValue + newScrollValue)));
				}
			} else if (newScrollValue > (scrollRange + fuzzyThreshold)) {
				// Check the mode supports the overscroll direction, and
				// then move scroll
				if (mode.showFooterLoadingLayout()) {
					// If we're currently at zero, we're about to start
					// overscrolling, so change the state
					if (currentScrollValue == 0) {
						view.setState(State.OVERSCROLLING);
					}

					view.setHeaderScroll((int) (scaleFactor * (currentScrollValue + newScrollValue - scrollRange)));
				}
			} else if (Math.abs(newScrollValue) <= fuzzyThreshold
					|| Math.abs(newScrollValue - scrollRange) <= fuzzyThreshold) {
				// Means we've stopped overscrolling, so scroll back to 0
				view.setState(State.RESET);
			}
		} else if (isTouchEvent && State.OVERSCROLLING == view.getState()) {
			// This condition means that we were overscrolling from a fling,
			// but the user has touched the View and is now overscrolling
			// from touch instead. We need to just reset.
			view.setState(State.RESET);
		}
	}
}
 
Example 10
Source File: OverscrollHelper.java    From bmob-android-demo-paging with GNU General Public License v3.0 4 votes vote down vote up
/**
 * Helper method for Overscrolling that encapsulates all of the necessary
 * function. This is the advanced version of the call.
 * 
 * @param view - PullToRefreshView that is calling this.
 * @param deltaX - Change in X in pixels, passed through from from
 *            overScrollBy call
 * @param scrollX - Current X scroll value in pixels before applying deltaY,
 *            passed through from from overScrollBy call
 * @param deltaY - Change in Y in pixels, passed through from from
 *            overScrollBy call
 * @param scrollY - Current Y scroll value in pixels before applying deltaY,
 *            passed through from from overScrollBy call
 * @param scrollRange - Scroll Range of the View, specifically needed for
 *            ScrollView
 * @param fuzzyThreshold - Threshold for which the values how fuzzy we
 *            should treat the other values. Needed for WebView as it
 *            doesn't always scroll back to it's edge. 0 = no fuzziness.
 * @param scaleFactor - Scale Factor for overscroll amount
 * @param isTouchEvent - true if this scroll operation is the result of a
 *            touch event, passed through from from overScrollBy call
 */
public static void overScrollBy(final PullToRefreshBase<?> view, final int deltaX, final int scrollX,
		final int deltaY, final int scrollY, final int scrollRange, final int fuzzyThreshold,
		final float scaleFactor, final boolean isTouchEvent) {

	final int deltaValue, currentScrollValue, scrollValue;
	switch (view.getPullToRefreshScrollDirection()) {
		case HORIZONTAL:
			deltaValue = deltaX;
			scrollValue = scrollX;
			currentScrollValue = view.getScrollX();
			break;
		case VERTICAL:
		default:
			deltaValue = deltaY;
			scrollValue = scrollY;
			currentScrollValue = view.getScrollY();
			break;
	}

	// Check that OverScroll is enabled and that we're not currently
	// refreshing.
	if (view.isPullToRefreshOverScrollEnabled() && !view.isRefreshing()) {
		final Mode mode = view.getMode();

		// Check that Pull-to-Refresh is enabled, and the event isn't from
		// touch
		if (mode.permitsPullToRefresh() && !isTouchEvent && deltaValue != 0) {
			final int newScrollValue = (deltaValue + scrollValue);

			if (PullToRefreshBase.DEBUG) {
				Log.d(LOG_TAG, "OverScroll. DeltaX: " + deltaX + ", ScrollX: " + scrollX + ", DeltaY: " + deltaY
						+ ", ScrollY: " + scrollY + ", NewY: " + newScrollValue + ", ScrollRange: " + scrollRange
						+ ", CurrentScroll: " + currentScrollValue);
			}

			if (newScrollValue < (0 - fuzzyThreshold)) {
				// Check the mode supports the overscroll direction, and
				// then move scroll
				if (mode.showHeaderLoadingLayout()) {
					// If we're currently at zero, we're about to start
					// overscrolling, so change the state
					if (currentScrollValue == 0) {
						view.setState(State.OVERSCROLLING);
					}

					view.setHeaderScroll((int) (scaleFactor * (currentScrollValue + newScrollValue)));
				}
			} else if (newScrollValue > (scrollRange + fuzzyThreshold)) {
				// Check the mode supports the overscroll direction, and
				// then move scroll
				if (mode.showFooterLoadingLayout()) {
					// If we're currently at zero, we're about to start
					// overscrolling, so change the state
					if (currentScrollValue == 0) {
						view.setState(State.OVERSCROLLING);
					}

					view.setHeaderScroll((int) (scaleFactor * (currentScrollValue + newScrollValue - scrollRange)));
				}
			} else if (Math.abs(newScrollValue) <= fuzzyThreshold
					|| Math.abs(newScrollValue - scrollRange) <= fuzzyThreshold) {
				// Means we've stopped overscrolling, so scroll back to 0
				view.setState(State.RESET);
			}
		} else if (isTouchEvent && State.OVERSCROLLING == view.getState()) {
			// This condition means that we were overscrolling from a fling,
			// but the user has touched the View and is now overscrolling
			// from touch instead. We need to just reset.
			view.setState(State.RESET);
		}
	}
}
 
Example 11
Source File: OverscrollHelper.java    From iSCAU-Android with GNU General Public License v3.0 4 votes vote down vote up
/**
 * Helper method for Overscrolling that encapsulates all of the necessary
 * function. This is the advanced version of the call.
 * 
 * @param view - PullToRefreshView that is calling this.
 * @param deltaX - Change in X in pixels, passed through from from
 *            overScrollBy call
 * @param scrollX - Current X scroll value in pixels before applying deltaY,
 *            passed through from from overScrollBy call
 * @param deltaY - Change in Y in pixels, passed through from from
 *            overScrollBy call
 * @param scrollY - Current Y scroll value in pixels before applying deltaY,
 *            passed through from from overScrollBy call
 * @param scrollRange - Scroll Range of the View, specifically needed for
 *            ScrollView
 * @param fuzzyThreshold - Threshold for which the values how fuzzy we
 *            should treat the other values. Needed for WebView as it
 *            doesn't always scroll back to it's edge. 0 = no fuzziness.
 * @param scaleFactor - Scale Factor for overscroll amount
 * @param isTouchEvent - true if this scroll operation is the result of a
 *            touch event, passed through from from overScrollBy call
 */
public static void overScrollBy(final PullToRefreshBase<?> view, final int deltaX, final int scrollX,
		final int deltaY, final int scrollY, final int scrollRange, final int fuzzyThreshold,
		final float scaleFactor, final boolean isTouchEvent) {

	final int deltaValue, currentScrollValue, scrollValue;
	switch (view.getPullToRefreshScrollDirection()) {
		case HORIZONTAL:
			deltaValue = deltaX;
			scrollValue = scrollX;
			currentScrollValue = view.getScrollX();
			break;
		case VERTICAL:
		default:
			deltaValue = deltaY;
			scrollValue = scrollY;
			currentScrollValue = view.getScrollY();
			break;
	}

	// Check that OverScroll is enabled and that we're not currently
	// refreshing.
	if (view.isPullToRefreshOverScrollEnabled() && !view.isRefreshing()) {
		final Mode mode = view.getMode();

		// Check that Pull-to-Refresh is enabled, and the event isn't from
		// touch
		if (mode.permitsPullToRefresh() && !isTouchEvent && deltaValue != 0) {
			final int newScrollValue = (deltaValue + scrollValue);

			if (PullToRefreshBase.DEBUG) {
				Log.d(LOG_TAG, "OverScroll. DeltaX: " + deltaX + ", ScrollX: " + scrollX + ", DeltaY: " + deltaY
						+ ", ScrollY: " + scrollY + ", NewY: " + newScrollValue + ", ScrollRange: " + scrollRange
						+ ", CurrentScroll: " + currentScrollValue);
			}

			if (newScrollValue < (0 - fuzzyThreshold)) {
				// Check the mode supports the overscroll direction, and
				// then move scroll
				if (mode.showHeaderLoadingLayout()) {
					// If we're currently at zero, we're about to start
					// overscrolling, so change the state
					if (currentScrollValue == 0) {
						view.setState(State.OVERSCROLLING);
					}

					view.setHeaderScroll((int) (scaleFactor * (currentScrollValue + newScrollValue)));
				}
			} else if (newScrollValue > (scrollRange + fuzzyThreshold)) {
				// Check the mode supports the overscroll direction, and
				// then move scroll
				if (mode.showFooterLoadingLayout()) {
					// If we're currently at zero, we're about to start
					// overscrolling, so change the state
					if (currentScrollValue == 0) {
						view.setState(State.OVERSCROLLING);
					}

					view.setHeaderScroll((int) (scaleFactor * (currentScrollValue + newScrollValue - scrollRange)));
				}
			} else if (Math.abs(newScrollValue) <= fuzzyThreshold
					|| Math.abs(newScrollValue - scrollRange) <= fuzzyThreshold) {
				// Means we've stopped overscrolling, so scroll back to 0
				view.setState(State.RESET);
			}
		} else if (isTouchEvent && State.OVERSCROLLING == view.getState()) {
			// This condition means that we were overscrolling from a fling,
			// but the user has touched the View and is now overscrolling
			// from touch instead. We need to just reset.
			view.setState(State.RESET);
		}
	}
}
 
Example 12
Source File: OverscrollHelper.java    From PullToRefresh-PinnedSection-ListView with MIT License 4 votes vote down vote up
/**
 * Helper method for Overscrolling that encapsulates all of the necessary
 * function. This is the advanced version of the call.
 * 
 * @param view - PullToRefreshView that is calling this.
 * @param deltaX - Change in X in pixels, passed through from from
 *            overScrollBy call
 * @param scrollX - Current X scroll value in pixels before applying deltaY,
 *            passed through from from overScrollBy call
 * @param deltaY - Change in Y in pixels, passed through from from
 *            overScrollBy call
 * @param scrollY - Current Y scroll value in pixels before applying deltaY,
 *            passed through from from overScrollBy call
 * @param scrollRange - Scroll Range of the View, specifically needed for
 *            ScrollView
 * @param fuzzyThreshold - Threshold for which the values how fuzzy we
 *            should treat the other values. Needed for WebView as it
 *            doesn't always scroll back to it's edge. 0 = no fuzziness.
 * @param scaleFactor - Scale Factor for overscroll amount
 * @param isTouchEvent - true if this scroll operation is the result of a
 *            touch event, passed through from from overScrollBy call
 */
public static void overScrollBy(final PullToRefreshBase<?> view, final int deltaX, final int scrollX,
		final int deltaY, final int scrollY, final int scrollRange, final int fuzzyThreshold,
		final float scaleFactor, final boolean isTouchEvent) {

	final int deltaValue, currentScrollValue, scrollValue;
	switch (view.getPullToRefreshScrollDirection()) {
		case HORIZONTAL:
			deltaValue = deltaX;
			scrollValue = scrollX;
			currentScrollValue = view.getScrollX();
			break;
		case VERTICAL:
		default:
			deltaValue = deltaY;
			scrollValue = scrollY;
			currentScrollValue = view.getScrollY();
			break;
	}

	// Check that OverScroll is enabled and that we're not currently
	// refreshing.
	if (view.isPullToRefreshOverScrollEnabled() && !view.isRefreshing()) {
		final Mode mode = view.getMode();

		// Check that Pull-to-Refresh is enabled, and the event isn't from
		// touch
		if (mode.permitsPullToRefresh() && !isTouchEvent && deltaValue != 0) {
			final int newScrollValue = (deltaValue + scrollValue);

			if (PullToRefreshBase.DEBUG) {
				Log.d(LOG_TAG, "OverScroll. DeltaX: " + deltaX + ", ScrollX: " + scrollX + ", DeltaY: " + deltaY
						+ ", ScrollY: " + scrollY + ", NewY: " + newScrollValue + ", ScrollRange: " + scrollRange
						+ ", CurrentScroll: " + currentScrollValue);
			}

			if (newScrollValue < (0 - fuzzyThreshold)) {
				// Check the mode supports the overscroll direction, and
				// then move scroll
				if (mode.showHeaderLoadingLayout()) {
					// If we're currently at zero, we're about to start
					// overscrolling, so change the state
					if (currentScrollValue == 0) {
						view.setState(State.OVERSCROLLING);
					}

					view.setHeaderScroll((int) (scaleFactor * (currentScrollValue + newScrollValue)));
				}
			} else if (newScrollValue > (scrollRange + fuzzyThreshold)) {
				// Check the mode supports the overscroll direction, and
				// then move scroll
				if (mode.showFooterLoadingLayout()) {
					// If we're currently at zero, we're about to start
					// overscrolling, so change the state
					if (currentScrollValue == 0) {
						view.setState(State.OVERSCROLLING);
					}

					view.setHeaderScroll((int) (scaleFactor * (currentScrollValue + newScrollValue - scrollRange)));
				}
			} else if (Math.abs(newScrollValue) <= fuzzyThreshold
					|| Math.abs(newScrollValue - scrollRange) <= fuzzyThreshold) {
				// Means we've stopped overscrolling, so scroll back to 0
				view.setState(State.RESET);
			}
		} else if (isTouchEvent && State.OVERSCROLLING == view.getState()) {
			// This condition means that we were overscrolling from a fling,
			// but the user has touched the View and is now overscrolling
			// from touch instead. We need to just reset.
			view.setState(State.RESET);
		}
	}
}
 
Example 13
Source File: OverscrollHelper.java    From handmarkPulltorefreshLibrary with Apache License 2.0 4 votes vote down vote up
/**
 * Helper method for Overscrolling that encapsulates all of the necessary
 * function. This is the advanced version of the call.
 * 
 * @param view - PullToRefreshView that is calling this.
 * @param deltaX - Change in X in pixels, passed through from from
 *            overScrollBy call
 * @param scrollX - Current X scroll value in pixels before applying deltaY,
 *            passed through from from overScrollBy call
 * @param deltaY - Change in Y in pixels, passed through from from
 *            overScrollBy call
 * @param scrollY - Current Y scroll value in pixels before applying deltaY,
 *            passed through from from overScrollBy call
 * @param scrollRange - Scroll Range of the View, specifically needed for
 *            ScrollView
 * @param fuzzyThreshold - Threshold for which the values how fuzzy we
 *            should treat the other values. Needed for WebView as it
 *            doesn't always scroll back to it's edge. 0 = no fuzziness.
 * @param scaleFactor - Scale Factor for overscroll amount
 * @param isTouchEvent - true if this scroll operation is the result of a
 *            touch event, passed through from from overScrollBy call
 */
public static void overScrollBy(final PullToRefreshBase<?> view, final int deltaX, final int scrollX,
		final int deltaY, final int scrollY, final int scrollRange, final int fuzzyThreshold,
		final float scaleFactor, final boolean isTouchEvent) {

	final int deltaValue, currentScrollValue, scrollValue;
	switch (view.getPullToRefreshScrollDirection()) {
		case HORIZONTAL:
			deltaValue = deltaX;
			scrollValue = scrollX;
			currentScrollValue = view.getScrollX();
			break;
		case VERTICAL:
		default:
			deltaValue = deltaY;
			scrollValue = scrollY;
			currentScrollValue = view.getScrollY();
			break;
	}

	// Check that OverScroll is enabled and that we're not currently
	// refreshing.
	if (view.isPullToRefreshOverScrollEnabled() && !view.isRefreshing()) {
		final Mode mode = view.getMode();

		// Check that Pull-to-Refresh is enabled, and the event isn't from
		// touch
		if (mode.permitsPullToRefresh() && !isTouchEvent && deltaValue != 0) {
			final int newScrollValue = (deltaValue + scrollValue);

			if (PullToRefreshBase.DEBUG) {
				Log.d(LOG_TAG, "OverScroll. DeltaX: " + deltaX + ", ScrollX: " + scrollX + ", DeltaY: " + deltaY
						+ ", ScrollY: " + scrollY + ", NewY: " + newScrollValue + ", ScrollRange: " + scrollRange
						+ ", CurrentScroll: " + currentScrollValue);
			}

			if (newScrollValue < (0 - fuzzyThreshold)) {
				// Check the mode supports the overscroll direction, and
				// then move scroll
				if (mode.showHeaderLoadingLayout()) {
					// If we're currently at zero, we're about to start
					// overscrolling, so change the state
					if (currentScrollValue == 0) {
						view.setState(State.OVERSCROLLING);
					}

					view.setHeaderScroll((int) (scaleFactor * (currentScrollValue + newScrollValue)));
				}
			} else if (newScrollValue > (scrollRange + fuzzyThreshold)) {
				// Check the mode supports the overscroll direction, and
				// then move scroll
				if (mode.showFooterLoadingLayout()) {
					// If we're currently at zero, we're about to start
					// overscrolling, so change the state
					if (currentScrollValue == 0) {
						view.setState(State.OVERSCROLLING);
					}

					view.setHeaderScroll((int) (scaleFactor * (currentScrollValue + newScrollValue - scrollRange)));
				}
			} else if (Math.abs(newScrollValue) <= fuzzyThreshold
					|| Math.abs(newScrollValue - scrollRange) <= fuzzyThreshold) {
				// Means we've stopped overscrolling, so scroll back to 0
				view.setState(State.RESET);
			}
		} else if (isTouchEvent && State.OVERSCROLLING == view.getState()) {
			// This condition means that we were overscrolling from a fling,
			// but the user has touched the View and is now overscrolling
			// from touch instead. We need to just reset.
			view.setState(State.RESET);
		}
	}
}
 
Example 14
Source File: OverscrollHelper.java    From zen4android with MIT License 4 votes vote down vote up
/**
 * Helper method for Overscrolling that encapsulates all of the necessary
 * function. This is the advanced version of the call.
 * 
 * @param view - PullToRefreshView that is calling this.
 * @param deltaX - Change in X in pixels, passed through from from
 *            overScrollBy call
 * @param scrollX - Current X scroll value in pixels before applying deltaY,
 *            passed through from from overScrollBy call
 * @param deltaY - Change in Y in pixels, passed through from from
 *            overScrollBy call
 * @param scrollY - Current Y scroll value in pixels before applying deltaY,
 *            passed through from from overScrollBy call
 * @param scrollRange - Scroll Range of the View, specifically needed for
 *            ScrollView
 * @param fuzzyThreshold - Threshold for which the values how fuzzy we
 *            should treat the other values. Needed for WebView as it
 *            doesn't always scroll back to it's edge. 0 = no fuzziness.
 * @param scaleFactor - Scale Factor for overscroll amount
 * @param isTouchEvent - true if this scroll operation is the result of a
 *            touch event, passed through from from overScrollBy call
 */
public static void overScrollBy(final PullToRefreshBase<?> view, final int deltaX, final int scrollX,
		final int deltaY, final int scrollY, final int scrollRange, final int fuzzyThreshold,
		final float scaleFactor, final boolean isTouchEvent) {

	final int deltaValue, currentScrollValue, scrollValue;
	switch (view.getPullToRefreshScrollDirection()) {
		case HORIZONTAL:
			deltaValue = deltaX;
			scrollValue = scrollX;
			currentScrollValue = view.getScrollX();
			break;
		case VERTICAL:
		default:
			deltaValue = deltaY;
			scrollValue = scrollY;
			currentScrollValue = view.getScrollY();
			break;
	}

	// Check that OverScroll is enabled and that we're not currently
	// refreshing.
	if (view.isPullToRefreshOverScrollEnabled() && !view.isRefreshing()) {
		final Mode mode = view.getMode();

		// Check that Pull-to-Refresh is enabled, and the event isn't from
		// touch
		if (mode.permitsPullToRefresh() && !isTouchEvent && deltaValue != 0) {
			final int newScrollValue = (deltaValue + scrollValue);

			if (PullToRefreshBase.DEBUG) {
				Log.d(LOG_TAG, "OverScroll. DeltaX: " + deltaX + ", ScrollX: " + scrollX + ", DeltaY: " + deltaY
						+ ", ScrollY: " + scrollY + ", NewY: " + newScrollValue + ", ScrollRange: " + scrollRange
						+ ", CurrentScroll: " + currentScrollValue);
			}

			if (newScrollValue < (0 - fuzzyThreshold)) {
				// Check the mode supports the overscroll direction, and
				// then move scroll
				if (mode.showHeaderLoadingLayout()) {
					// If we're currently at zero, we're about to start
					// overscrolling, so change the state
					if (currentScrollValue == 0) {
						view.setState(State.OVERSCROLLING);
					}

					view.setHeaderScroll((int) (scaleFactor * (currentScrollValue + newScrollValue)));
				}
			} else if (newScrollValue > (scrollRange + fuzzyThreshold)) {
				// Check the mode supports the overscroll direction, and
				// then move scroll
				if (mode.showFooterLoadingLayout()) {
					// If we're currently at zero, we're about to start
					// overscrolling, so change the state
					if (currentScrollValue == 0) {
						view.setState(State.OVERSCROLLING);
					}

					view.setHeaderScroll((int) (scaleFactor * (currentScrollValue + newScrollValue - scrollRange)));
				}
			} else if (Math.abs(newScrollValue) <= fuzzyThreshold
					|| Math.abs(newScrollValue - scrollRange) <= fuzzyThreshold) {
				// Means we've stopped overscrolling, so scroll back to 0
				view.setState(State.RESET);
			}
		} else if (isTouchEvent && State.OVERSCROLLING == view.getState()) {
			// This condition means that we were overscrolling from a fling,
			// but the user has touched the View and is now overscrolling
			// from touch instead. We need to just reset.
			view.setState(State.RESET);
		}
	}
}
 
Example 15
Source File: OverscrollHelper.java    From effective_android_sample with Apache License 2.0 4 votes vote down vote up
/**
 * Helper method for Overscrolling that encapsulates all of the necessary
 * function. This is the advanced version of the call.
 * 
 * @param view - PullToRefreshView that is calling this.
 * @param deltaX - Change in X in pixels, passed through from from
 *            overScrollBy call
 * @param scrollX - Current X scroll value in pixels before applying deltaY,
 *            passed through from from overScrollBy call
 * @param deltaY - Change in Y in pixels, passed through from from
 *            overScrollBy call
 * @param scrollY - Current Y scroll value in pixels before applying deltaY,
 *            passed through from from overScrollBy call
 * @param scrollRange - Scroll Range of the View, specifically needed for
 *            ScrollView
 * @param fuzzyThreshold - Threshold for which the values how fuzzy we
 *            should treat the other values. Needed for WebView as it
 *            doesn't always scroll back to it's edge. 0 = no fuzziness.
 * @param scaleFactor - Scale Factor for overscroll amount
 * @param isTouchEvent - true if this scroll operation is the result of a
 *            touch event, passed through from from overScrollBy call
 */
public static void overScrollBy(final PullToRefreshBase<?> view, final int deltaX, final int scrollX,
		final int deltaY, final int scrollY, final int scrollRange, final int fuzzyThreshold,
		final float scaleFactor, final boolean isTouchEvent) {

	final int deltaValue, currentScrollValue, scrollValue;
	switch (view.getPullToRefreshScrollDirection()) {
		case HORIZONTAL:
			deltaValue = deltaX;
			scrollValue = scrollX;
			currentScrollValue = view.getScrollX();
			break;
		case VERTICAL:
		default:
			deltaValue = deltaY;
			scrollValue = scrollY;
			currentScrollValue = view.getScrollY();
			break;
	}

	// Check that OverScroll is enabled and that we're not currently
	// refreshing.
	if (view.isPullToRefreshOverScrollEnabled() && !view.isRefreshing()) {
		final Mode mode = view.getMode();

		// Check that Pull-to-Refresh is enabled, and the event isn't from
		// touch
		if (mode.permitsPullToRefresh() && !isTouchEvent && deltaValue != 0) {
			final int newScrollValue = (deltaValue + scrollValue);

			if (PullToRefreshBase.DEBUG) {
				Log.d(LOG_TAG, "OverScroll. DeltaX: " + deltaX + ", ScrollX: " + scrollX + ", DeltaY: " + deltaY
						+ ", ScrollY: " + scrollY + ", NewY: " + newScrollValue + ", ScrollRange: " + scrollRange
						+ ", CurrentScroll: " + currentScrollValue);
			}

			if (newScrollValue < (0 - fuzzyThreshold)) {
				// Check the mode supports the overscroll direction, and
				// then move scroll
				if (mode.showHeaderLoadingLayout()) {
					// If we're currently at zero, we're about to start
					// overscrolling, so change the state
					if (currentScrollValue == 0) {
						view.setState(State.OVERSCROLLING);
					}

					view.setHeaderScroll((int) (scaleFactor * (currentScrollValue + newScrollValue)));
				}
			} else if (newScrollValue > (scrollRange + fuzzyThreshold)) {
				// Check the mode supports the overscroll direction, and
				// then move scroll
				if (mode.showFooterLoadingLayout()) {
					// If we're currently at zero, we're about to start
					// overscrolling, so change the state
					if (currentScrollValue == 0) {
						view.setState(State.OVERSCROLLING);
					}

					view.setHeaderScroll((int) (scaleFactor * (currentScrollValue + newScrollValue - scrollRange)));
				}
			} else if (Math.abs(newScrollValue) <= fuzzyThreshold
					|| Math.abs(newScrollValue - scrollRange) <= fuzzyThreshold) {
				// Means we've stopped overscrolling, so scroll back to 0
				view.setState(State.RESET);
			}
		} else if (isTouchEvent && State.OVERSCROLLING == view.getState()) {
			// This condition means that we were overscrolling from a fling,
			// but the user has touched the View and is now overscrolling
			// from touch instead. We need to just reset.
			view.setState(State.RESET);
		}
	}
}
 
Example 16
Source File: OverscrollHelper.java    From FacebookNewsfeedSample-Android with Apache License 2.0 4 votes vote down vote up
/**
 * Helper method for Overscrolling that encapsulates all of the necessary
 * function. This is the advanced version of the call.
 * 
 * @param view - PullToRefreshView that is calling this.
 * @param deltaX - Change in X in pixels, passed through from from
 *            overScrollBy call
 * @param scrollX - Current X scroll value in pixels before applying deltaY,
 *            passed through from from overScrollBy call
 * @param deltaY - Change in Y in pixels, passed through from from
 *            overScrollBy call
 * @param scrollY - Current Y scroll value in pixels before applying deltaY,
 *            passed through from from overScrollBy call
 * @param scrollRange - Scroll Range of the View, specifically needed for
 *            ScrollView
 * @param fuzzyThreshold - Threshold for which the values how fuzzy we
 *            should treat the other values. Needed for WebView as it
 *            doesn't always scroll back to it's edge. 0 = no fuzziness.
 * @param scaleFactor - Scale Factor for overscroll amount
 * @param isTouchEvent - true if this scroll operation is the result of a
 *            touch event, passed through from from overScrollBy call
 */
public static void overScrollBy(final PullToRefreshBase<?> view, final int deltaX, final int scrollX,
		final int deltaY, final int scrollY, final int scrollRange, final int fuzzyThreshold,
		final float scaleFactor, final boolean isTouchEvent) {

	final int deltaValue, currentScrollValue, scrollValue;
	switch (view.getPullToRefreshScrollDirection()) {
		case HORIZONTAL:
			deltaValue = deltaX;
			scrollValue = scrollX;
			currentScrollValue = view.getScrollX();
			break;
		case VERTICAL:
		default:
			deltaValue = deltaY;
			scrollValue = scrollY;
			currentScrollValue = view.getScrollY();
			break;
	}

	// Check that OverScroll is enabled and that we're not currently
	// refreshing.
	if (view.isPullToRefreshOverScrollEnabled() && !view.isRefreshing()) {
		final Mode mode = view.getMode();

		// Check that Pull-to-Refresh is enabled, and the event isn't from
		// touch
		if (mode.permitsPullToRefresh() && !isTouchEvent && deltaValue != 0) {
			final int newScrollValue = (deltaValue + scrollValue);

			if (PullToRefreshBase.DEBUG) {
				Log.d(LOG_TAG, "OverScroll. DeltaX: " + deltaX + ", ScrollX: " + scrollX + ", DeltaY: " + deltaY
						+ ", ScrollY: " + scrollY + ", NewY: " + newScrollValue + ", ScrollRange: " + scrollRange
						+ ", CurrentScroll: " + currentScrollValue);
			}

			if (newScrollValue < (0 - fuzzyThreshold)) {
				// Check the mode supports the overscroll direction, and
				// then move scroll
				if (mode.showHeaderLoadingLayout()) {
					// If we're currently at zero, we're about to start
					// overscrolling, so change the state
					if (currentScrollValue == 0) {
						view.setState(State.OVERSCROLLING);
					}

					view.setHeaderScroll((int) (scaleFactor * (currentScrollValue + newScrollValue)));
				}
			} else if (newScrollValue > (scrollRange + fuzzyThreshold)) {
				// Check the mode supports the overscroll direction, and
				// then move scroll
				if (mode.showFooterLoadingLayout()) {
					// If we're currently at zero, we're about to start
					// overscrolling, so change the state
					if (currentScrollValue == 0) {
						view.setState(State.OVERSCROLLING);
					}

					view.setHeaderScroll((int) (scaleFactor * (currentScrollValue + newScrollValue - scrollRange)));
				}
			} else if (Math.abs(newScrollValue) <= fuzzyThreshold
					|| Math.abs(newScrollValue - scrollRange) <= fuzzyThreshold) {
				// Means we've stopped overscrolling, so scroll back to 0
				view.setState(State.RESET);
			}
		} else if (isTouchEvent && State.OVERSCROLLING == view.getState()) {
			// This condition means that we were overscrolling from a fling,
			// but the user has touched the View and is now overscrolling
			// from touch instead. We need to just reset.
			view.setState(State.RESET);
		}
	}
}