/*******************************************************************************
* Copyright (c) 2012 Laurent CARON. All rights reserved.
* This program and the accompanying materials are made available under the terms
* of the Eclipse Public License v1.0 which accompanies this distribution,
* and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* Laurent CARON (laurent.caron at gmail dot com) - initial API and implementation
*******************************************************************************/
package org.mihalis.opal.breadcrumb;
import java.util.ArrayList;
import java.util.List;
import org.eclipse.swt.SWT;
import org.eclipse.swt.SWTException;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.events.SelectionListener;
import org.eclipse.swt.graphics.Color;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.graphics.GC;
import org.eclipse.swt.graphics.Image;
import org.eclipse.swt.graphics.Point;
import org.eclipse.swt.graphics.Rectangle;
import org.eclipse.swt.widgets.Event;
import org.eclipse.swt.widgets.Item;
import org.eclipse.swt.widgets.Widget;
// import org.mihalis.opal.utils.SWTGraphicUtil;
// origin: https://raw.githubusercontent.com/lcaron/opal/master/src/main/java/org/mihalis/opal/breadcrumb/BreadcrumbItem.java
// store a replica locally for eclipse
/**
* Instances of this class represent a selectable user interface object that represents an item of a breadcrumb.
* <dl>
* <dt><b>Styles:</b></dt>
* <dd>TOGGLE,PUSH,NONE</dd>
* <dt><b>Events:</b></dt>
* <dd>Selection</dd>
* </dl>
*
*/
public class BreadcrumbItem extends Item {
private static final int MIN_WIDTH = 40;
private static final int MARGIN = 4;
private static final Display display = Display.getCurrent();
private static Color SELECTED_COLOR = new Color(display, 223, 220, 213);
private final Breadcrumb parentBreadcrumb;
private final List<SelectionListener> selectionListeners;
private Rectangle bounds;
private boolean enabled;
private boolean selection;
private int width;
private int height;
private Image disabledImage;
private Image selectionImage;
private int alignment;
private Color textColorSelected;
private Color textColor;
private String tooltipText;
private GC gc;
private int toolbarHeight;
private boolean isLastItemOfTheBreadCrumb;
/**
* Constructs a new instance of this class given its parent (which must be a <code>Breadcrumb</code>)
* and a style value describing its behavior and appearance. The item is added to the end of the
* items maintained by its parent.
* <p>
* The style value is either one of the style constants defined in class <code>SWT</code> which is
* applicable to instances of this class, or must be built by <em>bitwise OR</em>'ing together
* (that is, using the <code>int</code> "|" operator) two or more of those <code>SWT</code> style constants.
* The class description lists the style constants that are applicable to the class. Style bits are
* also inherited from superclasses.
* </p>
*
* @param parent a composite control which will be the parent of the new instance (cannot be null)
*
* @exception IllegalArgumentException <ul>
* <li>ERROR_NULL_ARGUMENT - if the parent is null</li>
* </ul>
* @exception SWTException <ul>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the parent</li>
* <li>ERROR_INVALID_SUBCLASS - if this class is not an allowed subclass</li>
* </ul>
*
* @see Widget#getStyle
*/
public BreadcrumbItem(final Breadcrumb parent) {
this(parent, SWT.NONE);
}
/**
* Constructs a new instance of this class given its parent (which must be a <code>Breadcrumb</code>)
* and a style value describing its behavior and appearance. The item is added to the end of the
* items maintained by its parent.
* <p>
* The style value is either one of the style constants defined in class <code>SWT</code> which is
* applicable to instances of this class, or must be built by <em>bitwise OR</em>'ing together
* (that is, using the <code>int</code> "|" operator) two or more of those <code>SWT</code>
* style constants. The class description lists the style constants that are applicable to the class.
* Style bits are also inherited from superclasses.
* </p>
*
* @param parent a composite control which will be the parent of the new instance (cannot be null)
* @param style the style of control to construct
*
* @exception IllegalArgumentException
* <ul>
* <li>ERROR_NULL_ARGUMENT - if the parent is null</li>
* </ul>
* @exception SWTException
* <ul>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the parent</li>
* <li>ERROR_INVALID_SUBCLASS - if this class is not an allowed subclass</li>
* </ul>
*
* @see Widget#getStyle
*/
public BreadcrumbItem(final Breadcrumb parent, final int style) {
super(parent, checkStyle(style));
parent.addItem(this);
this.parentBreadcrumb = parent;
this.textColor = parent.getDisplay().getSystemColor(SWT.COLOR_BLACK);
this.textColorSelected = parent.getDisplay()
.getSystemColor(SWT.COLOR_BLACK);
this.enabled = true;
if ((style & SWT.LEFT) != 0) {
this.alignment = SWT.LEFT;
}
if ((style & SWT.CENTER) != 0) {
this.alignment = SWT.CENTER;
}
if ((style & SWT.RIGHT) != 0) {
this.alignment = SWT.RIGHT;
}
this.selectionListeners = new ArrayList<SelectionListener>();
this.width = this.height = -1;
}
private static int checkStyle(int style) {
style = checkBits(style, SWT.NONE, SWT.PUSH, SWT.TOGGLE);
if ((style & (SWT.PUSH | SWT.TOGGLE)) != 0) {
return checkBits(style, SWT.CENTER, SWT.LEFT, SWT.RIGHT);
}
return style;
}
private static int checkBits(int style, final int int0, final int int1,
final int int2) {
final int mask = int0 | int1 | int2;
if ((style & mask) == 0) {
style |= int0;
}
if ((style & int0) != 0) {
style = (style & ~mask) | int0;
}
if ((style & int1) != 0) {
style = (style & ~mask) | int1;
}
if ((style & int2) != 0) {
style = (style & ~mask) | int2;
}
return style;
}
/**
* Adds the listener to the collection of listeners who will be notified when the control
* is selected by the user, by sending it one of the messages defined in the
* <code>SelectionListener</code> interface.
* <p>
* <code>widgetDefaultSelected</code> is not called.
* </p>
*
* @param listener the listener which should be notified when the control is selected by the user,
*
* @exception IllegalArgumentException <ul>
* <li>ERROR_NULL_ARGUMENT - if the listener is null</li>
* </ul>
* @exception SWTException <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
* </ul>
*
* @see SelectionListener
* @see #removeSelectionListener
* @see SelectionEvent
*/
public void addSelectionListener(final SelectionListener listener) {
checkWidget();
if (listener == null) {
SWT.error(SWT.ERROR_NULL_ARGUMENT);
}
this.selectionListeners.add(listener);
}
/**
* @see org.eclipse.swt.widgets.Widget#dispose()
*/
@Override
public void dispose() {
getParent().removeItem(this);
this.bounds = null;
this.disabledImage = null;
this.selectionImage = null;
this.textColor = null;
this.textColorSelected = null;
super.dispose();
}
/**
* Returns a value which describes the position of the text in the receiver.
* The value will be one of <code>LEFT</code>, <code>RIGHT</code> or <code>CENTER</code>.
*
* @return the alignment
*
* @exception SWTException <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
* </ul>
*/
public int getAlignment() {
checkWidget();
return this.alignment;
}
/**
* Returns a rectangle describing the receiver's size and location relative to its parent
* (or its display if its parent is null), unless the receiver is a shell.
* In this case, the location is relative to the display.
*
* @return the receiver's bounding rectangle
*
* @exception SWTException <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
* </ul>
*/
public Rectangle getBounds() {
checkWidget();
return this.bounds;
}
/**
* @return the image displayed when the button is disabled
*
* @exception SWTException <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
* </ul>
*/
public Image getDisabledImage() {
checkWidget();
return this.disabledImage;
}
/**
* Returns <code>true</code> if the receiver is enabled, and <code>false</code> otherwise.
* A disabled control is typically not selectable from the user interface and draws with
* an inactive or "grayed" look.
*
* @return the receiver's enabled state
*
* @exception SWTException <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
* </ul>
*
* @see #isEnabled
*/
public boolean getEnabled() {
checkWidget();
return this.enabled;
}
/**
* Returns the whole height of the item.
*
* @return the receiver's height
*
* @exception SWTException <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
* </ul>
*/
public int getHeight() {
checkWidget();
if (this.height == -1) {
return computeDefaultSize().y;
}
return this.height;
}
/**
* @return the default size of the item
*/
private Point computeDefaultSize() {
final Point sizeOfTextAndImages = computeSizeOfTextAndImages();
return new Point(2 * MARGIN + sizeOfTextAndImages.x,
2 * MARGIN + sizeOfTextAndImages.y);
}
/**
* Returns the receiver's parent, which must be a <code>Breadcrumb</code>.
*
* @return the receiver's parent
*
* @exception SWTException <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
* </ul>
*/
public Breadcrumb getParent() {
checkWidget();
return this.parentBreadcrumb;
}
/**
* Returns <code>true</code> if the receiver is selected, and false otherwise.
*
* @return the selection state
*
* @exception SWTException <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
* </ul>
*/
public boolean getSelection() {
checkWidget();
return this.selection;
}
/**
* @return the image displayed when the button is selected
*
* @exception SWTException <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
* </ul>
*/
public Image getSelectionImage() {
checkWidget();
return this.selectionImage;
}
/**
* Returns the color of the text when the button is enabled and not selected.
*
* @return the receiver's text color
*
* @exception SWTException <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
* </ul>
*/
public Color getTextColor() {
checkWidget();
return this.textColor;
}
/**
* Returns the color of the text when the button is not selected.
*
* @return the receiver's text color
*
* @exception SWTException <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
* </ul>
*/
public Color getTextColorSelected() {
checkWidget();
return this.textColorSelected;
}
/**
* Returns the receiver's tool tip text, or null if it has not been set.
*
* @return the receiver's tool tip text
*
* @exception SWTException <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
* </ul>
*/
public String getTooltipText() {
checkWidget();
return this.tooltipText;
}
/**
* Returns the whole width of the item.
*
* @return the receiver's height
*
* @exception SWTException <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
* </ul>
*/
public int getWidth() {
checkWidget();
if (this.width == -1) {
return Math.max(computeDefaultSize().x, MIN_WIDTH);
}
return Math.max(this.width, MIN_WIDTH);
}
/**
* Returns <code>true</code> if the receiver is enabled, and <code>false</code> otherwise.
* A disabled control is typically not selectable from the user interface and draws
* with an inactive or "grayed" look.
*
* @return the receiver's enabled state
*
* @exception SWTException <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
* </ul>
*
* @see #getEnabled
*/
public boolean isEnabled() {
checkWidget();
return this.enabled;
}
/**
* Removes the listener from the collection of listeners who will be notified when the
* control is selected by the user.
*
* @param listener the listener which should no longer be notified
*
* @exception IllegalArgumentException <ul>
* <li>ERROR_NULL_ARGUMENT - if the listener is null</li>
* </ul>
* @exception SWTException <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
* </ul>
*
* @see SelectionListener
* @see #addSelectionListener
*/
public void removeSelectionListener(final SelectionListener listener) {
checkWidget();
if (listener == null) {
SWT.error(SWT.ERROR_NULL_ARGUMENT);
}
this.selectionListeners.remove(listener);
}
/**
* Controls how text will be displayed in the receiver. The argument should
* be one of <code>LEFT</code>, <code>RIGHT</code> or <code>CENTER</code>.
*
* @param alignment the new alignment
*
* @exception SWTException <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
* </ul>
*/
public void setAlignment(final int alignment) {
checkWidget();
this.alignment = alignment;
}
/**
* Sets the receiver's size and location to the rectangular area specified by the argument.
* The <code>x</code> and <code>y</code> fields of the rectangle are relative to the receiver's
* parent (or its display if its parent is null).
* <p>
* Note: Attempting to set the width or height of the receiver to a negative number will cause
* that value to be set to zero instead.
* </p>
*
* @param rect the new bounds for the receiver
*
* @exception SWTException <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
* </ul>
*/
public void setBounds(final Rectangle rectangle) {
checkWidget();
if (this.bounds == null) {
SWT.error(SWT.ERROR_NULL_ARGUMENT);
}
this.bounds = new Rectangle(Math.max(0, rectangle.x), //
Math.max(0, rectangle.y), //
Math.max(0, rectangle.width), //
Math.max(0, rectangle.height));
}
/**
* Sets the receiver's image to the argument when this is one is disabled, which may be null indicating that no image should be displayed.
*
* @param image the image to display on the receiver (may be null)
*
* @exception IllegalArgumentException <ul>
* <li>ERROR_INVALID_ARGUMENT - if the image has been disposed</li>
* </ul>
* @exception SWTException <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
* </ul>
*/
public void setDisabledImage(final Image image) {
checkWidget();
this.disabledImage = image;
}
/**
* Enables the receiver if the argument is <code>true</code>, and disables it otherwise.
* <p>
* A disabled control is typically not selectable from the user interface and draws with an inactive or "grayed" look.
* </p>
*
* @param enabled the new enabled state
*
* @exception SWTException <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
* </ul>
*/
public void setEnabled(final boolean enabled) {
checkWidget();
this.enabled = enabled;
}
/**
* Sets the height of the receiver.
* <p>
* Note: Attempting to set the width or height of the receiver to a negative number will cause that value to be set to zero
* instead.
* </p>
* @param height the new width
*
* @exception SWTException <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
* </ul>
*/
public void setHeight(final int height) {
checkWidget();
this.height = Math.max(height, 0);
}
/**
* Sets the selection state of the receiver.
*
* @param selected the new selection state
*
* @exception SWTException <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
* </ul>
*/
public void setSelection(final boolean selected) {
checkWidget();
this.selection = selected;
}
/**
* Sets the receiver's image to the argument when this one is selected, which may be
* null indicating that no image should be displayed.
*
* @param image the image to display on the receiver (may be null)
*
* @exception IllegalArgumentException <ul>
* <li>ERROR_INVALID_ARGUMENT - if the image has been disposed</li>
* </ul>
* @exception SWTException <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
* </ul>
*/
public void setSelectionImage(final Image image) {
checkWidget();
this.selectionImage = image;
}
/**
* Sets the receiver's text color to the argument, which may be null indicating that no image should be displayed.
*
* @param textColor the text color to display on the receiver (may be null)
*
* @exception IllegalArgumentException <ul>
* <li>ERROR_INVALID_ARGUMENT - if the image has been disposed</li>
* </ul>
* @exception SWTException <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
* </ul>
*/
public void setTextColor(final Color textColor) {
checkWidget();
this.textColor = textColor;
}
/**
* Sets the receiver's text color to the argument when this one is selected, which may be null indicating that no image should be displayed.
*
* @param textColor the text color to display on the receiver (may be null)
*
* @exception IllegalArgumentException <ul>
* <li>ERROR_INVALID_ARGUMENT - if the image has been disposed</li>
* </ul>
* @exception SWTException <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
* </ul>
*/
public void setTextColorSelected(final Color textColor) {
checkWidget();
this.textColorSelected = textColor;
}
/**
* Sets the receiver's tool tip text to the argument, which may be null indicating
* that the default tool tip for the control will be shown. For a control that has
* a default tool tip, such as the Tree control on Windows, setting the tool tip text to an
* empty string replaces the default, causing no tool tip text to be shown.
* <p>
* The mnemonic indicator (character '&') is not displayed in a tool tip. To display
* a single '&' in the tool tip, the character '&' can be escaped by doubling it in the string.
* </p>
*
* @param string the new tool tip text (or null)
*
* @exception SWTException <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
* </ul>
*/
public void setTooltipText(final String string) {
checkWidget();
this.tooltipText = (string == null ? "" : string);
}
/**
* Sets the width of the receiver.
* <p>
* Note: Attempting to set the width or height of the receiver to a negative number will cause that value to be set to zero
* instead.
* </p>
* @param width the new width
*
* @exception SWTException <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
* </ul>
*/
public void setWidth(final int width) {
checkWidget();
this.width = Math.max(0, width);
}
// --------------------------------------------- Package visibility section
void fireSelectionEvent() {
final Event event = new Event();
event.widget = this.parentBreadcrumb;
event.display = getDisplay();
event.item = this;
event.type = SWT.Selection;
for (final SelectionListener selectionListener : this.selectionListeners) {
selectionListener.widgetSelected(new SelectionEvent(event));
}
}
void drawButtonAtPosition(final int x) {
if (this.selection) {
drawBackgroundAtPosition(x);
}
if (!this.isLastItemOfTheBreadCrumb) {
drawTrianglesAtPosition(x);
}
int xPosition = computeGap();
final Image drawnedImage = drawImageAtPosition(x + xPosition);
if (drawnedImage != null) {
xPosition += drawnedImage.getBounds().width + 2 * MARGIN;
}
drawTextAtPosition(x + xPosition);
this.bounds = new Rectangle(x, 0, getWidth(), this.toolbarHeight);
}
private void drawBackgroundAtPosition(final int x) {
this.gc.setAdvanced(true);
this.gc.setAntialias(SWT.ON);
this.gc.setForeground(SELECTED_COLOR);
this.gc.setBackground(SELECTED_COLOR);
final boolean hasBorder = this.parentBreadcrumb.hasBorder;
final boolean isFirst = this.parentBreadcrumb.indexOf(this) == 0;
final int borderWidth = hasBorder ? 1 : 0;
int leftSide;
if (isFirst) {
leftSide = 0;
} else {
leftSide = 5 + (hasBorder ? 0 : 1);
}
final int xUpperLeft = x + borderWidth + leftSide;
final int yUpperLeft = borderWidth;
final int rectWidth = getWidth() - borderWidth - leftSide
- (this.isLastItemOfTheBreadCrumb && hasBorder ? 1 : 0);
final int rectHeight = getHeight() - 2 * borderWidth;
this.gc.fillRectangle(xUpperLeft, yUpperLeft, rectWidth, rectHeight);
if (!isFirst) {
this.gc.fillPolygon(new int[] { xUpperLeft - 5, yUpperLeft, //
xUpperLeft, yUpperLeft, //
xUpperLeft, yUpperLeft + this.toolbarHeight / 2 //
});
this.gc.fillPolygon(new int[] { xUpperLeft - 5, yUpperLeft + rectHeight, //
xUpperLeft, yUpperLeft + rectHeight, //
xUpperLeft, yUpperLeft + this.toolbarHeight / 2 //
});
}
if (!this.isLastItemOfTheBreadCrumb) {
this.gc.fillPolygon(new int[] { xUpperLeft + rectWidth, yUpperLeft + 1, //
xUpperLeft + rectWidth, yUpperLeft + getHeight(), //
xUpperLeft + rectWidth + 5, yUpperLeft + this.toolbarHeight / 2 //
});
}
this.gc.setClipping((Rectangle) null);
}
private void drawTrianglesAtPosition(final int x) {
this.gc.setForeground(Breadcrumb.BORDER_COLOR);
drawTriangleAtPosition(x + getWidth());
this.gc.setAlpha(127);
this.gc.setForeground(Breadcrumb.BORDER_COLOR_1);
drawTriangleAtPosition(x + getWidth() + 1);
this.gc.setForeground(Breadcrumb.BORDER_COLOR_2);
drawTriangleAtPosition(x + getWidth() + 2);
this.gc.setForeground(Breadcrumb.BORDER_COLOR_3);
drawTriangleAtPosition(x + getWidth() + 3);
this.gc.setAlpha(255);
if (this.parentBreadcrumb.hasBorder) {
this.gc.setForeground(Breadcrumb.BORDER_COLOR);
this.gc.drawLine(x + getWidth(), 0, x + getWidth() + 3, 0);
this.gc.drawLine(x + getWidth(), this.toolbarHeight - 1,
x + getWidth() + 3, this.toolbarHeight - 1);
}
}
private void drawTriangleAtPosition(final int x) {
this.gc.drawLine(x, 0, x + 5, this.toolbarHeight / 2);
this.gc.drawLine(x + 5, this.toolbarHeight / 2, x, this.toolbarHeight);
}
private int computeGap() {
final int widthOfTextAndImage = computeSizeOfTextAndImages().x;
switch (this.alignment) {
case SWT.CENTER:
return (getWidth() - widthOfTextAndImage) / 2;
case SWT.RIGHT:
return getWidth() - widthOfTextAndImage - MARGIN;
default:
return MARGIN;
}
}
private Point computeSizeOfTextAndImages() {
int width = 0, height = 0;
final boolean textISNotEmpty = getText() != null && !getText().equals("");
if (textISNotEmpty) {
final GC gc = new GC(this.parentBreadcrumb);
gc.setFont(this.parentBreadcrumb.getFont());
final Point extent = gc.stringExtent(getText());
gc.dispose();
width += extent.x;
height = extent.y;
}
final Point imageSize = computeMaxWidthAndHeightForImages(getImage(),
this.selectionImage, this.disabledImage);
if (imageSize.x != -1) {
width += imageSize.x;
height = Math.max(imageSize.y, height);
if (textISNotEmpty) {
width += MARGIN * 2;
}
}
width += MARGIN;
return new Point(width, height);
}
private Point computeMaxWidthAndHeightForImages(final Image... images) {
final Point imageSize = new Point(-1, -1);
for (final Image image : images) {
if (image == null) {
continue;
}
final Rectangle imageBounds = image.getBounds();
imageSize.x = Math.max(imageBounds.width, imageSize.x);
imageSize.y = Math.max(imageBounds.height, imageSize.y);
}
return imageSize;
}
private Image drawImageAtPosition(final int xPosition) {
Image image;
if (!isEnabled()) {
image = this.disabledImage;
} else if (this.selection) {
image = this.selectionImage;
} else {
image = getImage();
}
if (image == null) {
return null;
}
final int yPosition = (this.toolbarHeight - image.getBounds().height) / 2;
this.gc.drawImage(image, (int) (xPosition + MARGIN * 1.5), yPosition);
return image;
}
private void drawTextAtPosition(final int xPosition) {
this.gc.setFont(this.parentBreadcrumb.getFont());
if (this.selection) {
this.gc.setForeground(this.textColorSelected);
} else {
this.gc.setForeground(this.textColor);
}
final Point textSize = this.gc.stringExtent(getText());
final int yPosition = (this.toolbarHeight - textSize.y) / 2;
int padding;
if (this.parentBreadcrumb.indexOf(this) == 0
|| this.isLastItemOfTheBreadCrumb) {
padding = 0;
} else {
padding = 5;
}
this.gc.drawText(getText(), xPosition + padding, yPosition, true);
}
BreadcrumbItem setGc(final GC gc) {
this.gc = gc;
return this;
}
BreadcrumbItem setToolbarHeight(final int toolbarHeight) {
this.toolbarHeight = toolbarHeight;
return this;
}
BreadcrumbItem setIsLastItemOfTheBreadCrumb(
final boolean isLastItemOfTheBreadCrumb) {
this.isLastItemOfTheBreadCrumb = isLastItemOfTheBreadCrumb;
return this;
}
}
