com.google.gwt.event.dom.client.ScrollEvent Java Examples

The following examples show how to use com.google.gwt.event.dom.client.ScrollEvent. You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example. You may check out the related API usage on the sidebar.

Example #1

Source File: GanttWidget.java From gantt with Apache License 2.0

6 votes

@Override
public void onScroll(ScrollEvent event) {
    final Element element = event.getNativeEvent().getEventTarget().cast();
    if (element != container) {
        return;
    }
    AnimationScheduler.get().requestAnimationFrame(new AnimationCallback() {

        @Override
        public void execute(double timestamp) {
            int sl = container.getScrollLeft();
            int st = container.getScrollTop();
            if (sl != previousContainerScrollLeft) {
                timeline.setScrollLeft(sl);
                previousContainerScrollLeft = sl;
            }
            if (st != previousContainerScrollTop) {
                previousContainerScrollTop = st;
            }
        }
    });
}

Example #2

Source File: GanttConnector.java From gantt with Apache License 2.0

6 votes

@Override
public void onScroll(ScrollEvent event) {
    if (delegatingVerticalScroll) {
        // if other component is scrolling, don't allow this scroll
        // event
        return;
    }
    AnimationScheduler.get().requestAnimationFrame(new AnimationCallback() {

        @Override
        public void execute(double timestamp) {
            ganttScrollDelay.cancel();
            ganttDelegatingVerticalScroll = true;
            int scrollTop = getWidget().getScrollContainer().getScrollTop();
            try {
                if (delegateScrollGridTarget != null) {
                    delegateScrollGridTarget.setScrollTop(scrollTop);
                }

            } finally {
                ganttScrollDelay.schedule(20);
            }
        }
    });
}

Example #3

Source File: DiagramController.java From document-management-software with GNU Lesser General Public License v3.0

5 votes

public ScrollPanel getViewAsScrollPanel() {
	scrollPanel.addScrollHandler(new ScrollHandler() {
		@Override
		public void onScroll(ScrollEvent event) {
			unsynchronizedShapes();
		}
	});
	return scrollPanel;
}

Example #4

Source File: DiagramController.java From EasyML with Apache License 2.0

5 votes

/**
 * Get the scroll panel in the drawing cavcas.
 * @return
 */
public ScrollPanel getViewAsScrollPanel() {
	scrollPanel.addScrollHandler(new ScrollHandler() {
		@Override
		public void onScroll(ScrollEvent event) {
		}
	});
	return scrollPanel;
}

Example #5

Source File: UIHider.java From djvu-html5 with GNU General Public License v2.0

5 votes

public UIHider(int uiHideDelay, Widget textLayer) {
	this.uiHideDelay = uiHideDelay;
	textLayer.addDomHandler(this, MouseMoveEvent.getType());
	textLayer.addDomHandler(this, KeyDownEvent.getType());
	textLayer.addDomHandler(this, ScrollEvent.getType());
	textLayer.addDomHandler(this, TouchStartEvent.getType());
}

Example #6

Source File: TextLayer.java From djvu-html5 with GNU General Public License v2.0

5 votes

public TextLayer(Djvu_html5 app) {
	this.app = app;
	setStyleName("textLayer");
	getElement().setAttribute("tabindex", "-1");

	addDomHandler(this, ScrollEvent.getType());

	app.getDataStore().addInfoListener(this::pageInfoAvailable);
	if (DjvuContext.getTextLayerEnabled())
		app.getDataStore().addTextListener(this::textAvailable);

	fontMeasure = Canvas.createIfSupported().getContext2d();
}

Example #7

Source File: TextLayer.java From djvu-html5 with GNU General Public License v2.0

5 votes

@Override
public void onScroll(ScrollEvent event) {
	int scrollTop = getElement().getScrollTop();
	int page = currentPage;
	Element pageElement = pages.get(page).getElement();
	while (page > 0 && pageElement.getOffsetTop() > scrollTop) {
		pageElement = pages.get(--page).getElement();
	}
	while (page + 1 < pages.size() && pageElement.getOffsetTop() + pageElement.getOffsetHeight() < scrollTop) {
		pageElement = pages.get(++page).getElement();
	}
	int left = pageElement.getOffsetLeft() - getElement().getScrollLeft();
	int top = pageElement.getOffsetTop() - scrollTop;
	app.getPageLayout().externalScroll(page, left, top);
}

Example #8

Source File: GanttConnector.java From gantt with Apache License 2.0

5 votes

@Override
public void onScroll(ScrollEvent event) {
    if (ganttDelegatingVerticalScroll) {
        // if gantt is scrolling, don't allow this scroll event
        return;
    }
    AnimationScheduler.get().requestAnimationFrame(new AnimationCallback() {

        @Override
        public void execute(double timestamp) {
            onDelegateScroll();
        }
    });
}

Example #9

Source File: GanttConnector.java From gantt with Apache License 2.0

5 votes

@Override
public void onScroll(com.vaadin.client.widget.grid.events.ScrollEvent event) {
    if (ganttDelegatingVerticalScroll) {
        // if gantt is scrolling, don't allow this scroll event
        return;
    }
    AnimationScheduler.get().requestAnimationFrame(new AnimationCallback() {

        @Override
        public void execute(double timestamp) {
            onDelegateScroll();
        }
    });
}

Example #10

Source File: UIHider.java From djvu-html5 with GNU General Public License v2.0

4 votes

@Override
public void onScroll(ScrollEvent event) {
	showUI();
}

Example #11

Source File: GanttWidget.java From gantt with Apache License 2.0

4 votes

/**
 * Reset listeners.
 */
public void resetListeners() {
    Event.sinkEvents(container, Event.ONSCROLL | Event.ONCONTEXTMENU);

    if (contextMenuHandlerRegistration == null) {
        contextMenuHandlerRegistration = addDomHandler(contextMenuHandler, ContextMenuEvent.getType());
    }

    if (scrollHandlerRegistration == null) {
        scrollHandlerRegistration = addHandler(scrollHandler, ScrollEvent.getType());
    }
    if (isMsTouchSupported()) {
        // IE10 pointer events (ms-prefixed events)
        if (pointerDownHandlerRegistration == null) {
            pointerDownHandlerRegistration = addDomHandler(msPointerDownHandler, PointerDownEvent.getType());
        }
        if (pointerUpHandlerRegistration == null) {
            pointerUpHandlerRegistration = addDomHandler(msPointerUpHandler, PointerUpEvent.getType());
        }
        if (pointerMoveHandlerRegistration == null) {
            pointerMoveHandlerRegistration = addDomHandler(msPointerMoveHandler, PointerMoveEvent.getType());
        }
        if (pointerCancelHandlerRegistration == null) {
            pointerCancelHandlerRegistration = addHandler(msPointerCancelHandler, PointerCancelEvent.getType());
        }
    } else if (touchSupported) {
        // touch events replaces mouse events
        if (touchStartHandlerRegistration == null) {
            touchStartHandlerRegistration = addDomHandler(touchStartHandler, TouchStartEvent.getType());
        }
        if (touchEndHandlerRegistration == null) {
            touchEndHandlerRegistration = addDomHandler(touchEndHandler, TouchEndEvent.getType());
        }
        if (touchMoveHandlerRegistration == null) {
            touchMoveHandlerRegistration = addDomHandler(touchMoveHandler, TouchMoveEvent.getType());
        }
        if (touchCancelHandlerRegistration == null) {
            touchCancelHandlerRegistration = addHandler(touchCancelHandler, TouchCancelEvent.getType());
        }

    } else {
        if (mouseDblClickHandlerRegistration == null) {
            mouseDblClickHandlerRegistration = addDomHandler(doubleClickHandler, DoubleClickEvent.getType());
        }
        if (mouseDownHandlerRegistration == null) {
            mouseDownHandlerRegistration = addDomHandler(mouseDownHandler, MouseDownEvent.getType());
        }
        if (mouseUpHandlerRegistration == null) {
            mouseUpHandlerRegistration = addDomHandler(mouseUpHandler, MouseUpEvent.getType());
        }
        if (isMovableSteps() || isResizableSteps()) {
            if (mouseMoveHandlerRegistration == null) {
                mouseMoveHandlerRegistration = addDomHandler(mouseMoveHandler, MouseMoveEvent.getType());
            }
        } else if (mouseMoveHandlerRegistration != null) {
            mouseMoveHandlerRegistration.removeHandler();
            mouseMoveHandlerRegistration = null;
        }
    }
}