ctabfolder.java

源码为Eclipse开源开发平台桌面开发工具SWT的源代码,

		} else {
			gc.drawLine(x1, y2, x2, y2); // bottom
		}
	}
}

void drawChevron(GC gc) {
	if (chevronRect.width == 0 || chevronRect.height == 0) return;
	// draw chevron (10x7)
	Display display = getDisplay();
	FontData fd = getFont().getFontData()[0];
	fd.setHeight(7);
	Font f = new Font(display, fd);
	int fHeight = f.getFontData()[0].getHeight() * display.getDPI().y / 72;
	int indent = Math.max(2, (chevronRect.height - fHeight - 4) /2);
	int x = chevronRect.x + 2;
	int y = chevronRect.y + indent;
	int count;
	if (single) {
		count = selectedIndex == -1 ? items.length : items.length - 1;
	} else {
		int lastIndex = getLastIndex();
		count = Math.max(0, items.length - (lastIndex - firstIndex + 1));
	}
	switch (chevronImageState) {
		case NORMAL: {
			Color chevronBorder = single ? getSelectionForeground() : getForeground();
			gc.setForeground(chevronBorder);
			gc.setFont(f);
			gc.drawLine(x,y,     x+2,y+2);
			gc.drawLine(x+2,y+2, x,y+4);
			gc.drawLine(x+1,y,   x+3,y+2);
			gc.drawLine(x+3,y+2, x+1,y+4);
			gc.drawLine(x+4,y,   x+6,y+2);
			gc.drawLine(x+6,y+2, x+5,y+4);
			gc.drawLine(x+5,y,   x+7,y+2);
			gc.drawLine(x+7,y+2, x+4,y+4);
			gc.drawString(String.valueOf(count), x+7, y+3, true);
			break;
		}
		case HOT: {
			gc.setForeground(display.getSystemColor(BUTTON_BORDER));
			gc.setBackground(display.getSystemColor(BUTTON_FILL));
			gc.setFont(f);
			gc.fillRoundRectangle(chevronRect.x, chevronRect.y, chevronRect.width, chevronRect.height, 6, 6);
			gc.drawRoundRectangle(chevronRect.x, chevronRect.y, chevronRect.width - 1, chevronRect.height - 1, 6, 6);
			gc.drawLine(x,y,     x+2,y+2);
			gc.drawLine(x+2,y+2, x,y+4);
			gc.drawLine(x+1,y,   x+3,y+2);
			gc.drawLine(x+3,y+2, x+1,y+4);
			gc.drawLine(x+4,y,   x+6,y+2);
			gc.drawLine(x+6,y+2, x+5,y+4);
			gc.drawLine(x+5,y,   x+7,y+2);
			gc.drawLine(x+7,y+2, x+4,y+4);
			gc.drawString(String.valueOf(count), x+7, y+3, true);
			break;
		}
		case SELECTED: {
			gc.setForeground(display.getSystemColor(BUTTON_BORDER));
			gc.setBackground(display.getSystemColor(BUTTON_FILL));
			gc.setFont(f);
			gc.fillRoundRectangle(chevronRect.x, chevronRect.y, chevronRect.width, chevronRect.height, 6, 6);
			gc.drawRoundRectangle(chevronRect.x, chevronRect.y, chevronRect.width - 1, chevronRect.height - 1, 6, 6);
			gc.drawLine(x+1,y+1, x+3,y+3);
			gc.drawLine(x+3,y+3, x+1,y+5);
			gc.drawLine(x+2,y+1, x+4,y+3);
			gc.drawLine(x+4,y+3, x+2,y+5);
			gc.drawLine(x+5,y+1, x+7,y+3);
			gc.drawLine(x+7,y+3, x+6,y+5);
			gc.drawLine(x+6,y+1, x+8,y+3);
			gc.drawLine(x+8,y+3, x+5,y+5);
			gc.drawString(String.valueOf(count), x+8, y+4, true);
			break;
		}
	}
	f.dispose();
}
void drawMaximize(GC gc) {
	if (maxRect.width == 0 || maxRect.height == 0) return;
	Display display = getDisplay();
	// 5x4 or 7x9
	int x = maxRect.x + (CTabFolder.BUTTON_SIZE - 10)/2;
	int y = maxRect.y + 3;
	
	gc.setForeground(display.getSystemColor(BUTTON_BORDER));
	gc.setBackground(display.getSystemColor(BUTTON_FILL));
	
	switch (maxImageState) {
		case NORMAL: {
			if (!maximized) {
				gc.fillRectangle(x, y, 9, 9);
				gc.drawRectangle(x, y, 9, 9);
				gc.drawLine(x+1, y+2, x+8, y+2);				
			} else {
				gc.fillRectangle(x, y+3, 5, 4);
				gc.fillRectangle(x+2, y, 5, 4);
				gc.drawRectangle(x, y+3, 5, 4);
				gc.drawRectangle(x+2, y, 5, 4);
				gc.drawLine(x+3, y+1, x+6, y+1);
				gc.drawLine(x+1, y+4, x+4, y+4);
			}
			break;
		}
		case HOT: {
			gc.fillRoundRectangle(maxRect.x, maxRect.y, maxRect.width, maxRect.height, 6, 6);
			gc.drawRoundRectangle(maxRect.x, maxRect.y, maxRect.width - 1, maxRect.height - 1, 6, 6);
			if (!maximized) {
				gc.fillRectangle(x, y, 9, 9);
				gc.drawRectangle(x, y, 9, 9);
				gc.drawLine(x+1, y+2, x+8, y+2);
			} else {
				gc.fillRectangle(x, y+3, 5, 4);
				gc.fillRectangle(x+2, y, 5, 4);
				gc.drawRectangle(x, y+3, 5, 4);
				gc.drawRectangle(x+2, y, 5, 4);
				gc.drawLine(x+3, y+1, x+6, y+1);
				gc.drawLine(x+1, y+4, x+4, y+4);
			}
			break;
		}
		case SELECTED: {
			gc.fillRoundRectangle(maxRect.x, maxRect.y, maxRect.width, maxRect.height, 6, 6);
			gc.drawRoundRectangle(maxRect.x, maxRect.y, maxRect.width - 1, maxRect.height - 1, 6, 6);
			if (!maximized) {
				gc.fillRectangle(x+1, y+1, 9, 9);
				gc.drawRectangle(x+1, y+1, 9, 9);
				gc.drawLine(x+2, y+3, x+9, y+3);
			} else {
				gc.fillRectangle(x+1, y+4, 5, 4);
				gc.fillRectangle(x+3, y+1, 5, 4);
				gc.drawRectangle(x+1, y+4, 5, 4);
				gc.drawRectangle(x+3, y+1, 5, 4);
				gc.drawLine(x+4, y+2, x+7, y+2);
				gc.drawLine(x+2, y+5, x+5, y+5);
			}
			break;
		}
	}
}
void drawMinimize(GC gc) {
	if (minRect.width == 0 || minRect.height == 0) return;
	Display display = getDisplay();
	// 5x4 or 9x3
	int x = minRect.x + (BUTTON_SIZE - 10)/2;
	int y = minRect.y + 3;
	
	gc.setForeground(display.getSystemColor(BUTTON_BORDER));
	gc.setBackground(display.getSystemColor(BUTTON_FILL));
	
	switch (minImageState) {
		case NORMAL: {
			if (!minimized) {
				gc.fillRectangle(x, y, 9, 3);
				gc.drawRectangle(x, y, 9, 3);
			} else {
				gc.fillRectangle(x, y+3, 5, 4);
				gc.fillRectangle(x+2, y, 5, 4);
				gc.drawRectangle(x, y+3, 5, 4);
				gc.drawRectangle(x+2, y, 5, 4);
				gc.drawLine(x+3, y+1, x+6, y+1);
				gc.drawLine(x+1, y+4, x+4, y+4);
			}
			break;
		}
		case HOT: {
			gc.fillRoundRectangle(minRect.x, minRect.y, minRect.width, minRect.height, 6, 6);
			gc.drawRoundRectangle(minRect.x, minRect.y, minRect.width - 1, minRect.height - 1, 6, 6);
			if (!minimized) {
				gc.fillRectangle(x, y, 9, 3);
				gc.drawRectangle(x, y, 9, 3);
			} else {
				gc.fillRectangle(x, y+3, 5, 4);
				gc.fillRectangle(x+2, y, 5, 4);
				gc.drawRectangle(x, y+3, 5, 4);
				gc.drawRectangle(x+2, y, 5, 4);
				gc.drawLine(x+3, y+1, x+6, y+1);
				gc.drawLine(x+1, y+4, x+4, y+4);
			}
			break;
		}
		case SELECTED: {
			gc.fillRoundRectangle(minRect.x, minRect.y, minRect.width, minRect.height, 6, 6);
			gc.drawRoundRectangle(minRect.x, minRect.y, minRect.width - 1, minRect.height - 1, 6, 6);
			if (!minimized) {
				gc.fillRectangle(x+1, y+1, 9, 3);
				gc.drawRectangle(x+1, y+1, 9, 3);
			} else {
				gc.fillRectangle(x+1, y+4, 5, 4);
				gc.fillRectangle(x+3, y+1, 5, 4);
				gc.drawRectangle(x+1, y+4, 5, 4);
				gc.drawRectangle(x+3, y+1, 5, 4);
				gc.drawLine(x+4, y+2, x+7, y+2);
				gc.drawLine(x+2, y+5, x+5, y+5);
			}
			break;
		}
	}
}
void drawTabArea(Event event) {
	GC gc = event.gc;
	Point size = getSize();
	int[] shape = null;
	
	if (tabHeight == 0) {
		int x1 = borderLeft - 1;
		int x2 = size.x - borderRight;
		int y1 = onBottom ? size.y - borderBottom - highlight_header - 1 : borderTop + highlight_header;
		int y2 = onBottom ? size.y - borderBottom : borderTop;
		if (borderLeft > 0 && onBottom) y2 -= 1;
		
		shape = new int[] {x1, y1, x1,y2, x2,y2, x2,y1};

		// If horizontal gradient, show gradient across the whole area
		if (selectedIndex != -1 && selectionGradientColors != null && selectionGradientColors.length > 1 && !selectionGradientVertical) {
			drawBackground(gc, shape, true);
		} else if (selectedIndex == -1 && gradientColors != null && gradientColors.length > 1 && !gradientVertical) {
			drawBackground(gc, shape, false);
		} else {
			gc.setBackground(selectedIndex == -1 ? getBackground() : selectionBackground);
			gc.fillPolygon(shape);
		}
		
		//draw 1 pixel border
		if (borderLeft > 0) {
			gc.setForeground(borderColor);
			gc.drawPolyline(shape); 
		}
		return;
	}
	
	int x = Math.max(0, borderLeft - 1);
	int y = onBottom ? size.y - borderBottom - tabHeight : borderTop;
	int width = size.x - borderLeft - borderRight + 1;
	int height = tabHeight - 1;
	
	// Draw Tab Header
	if (onBottom) {
		int[] left = simple ? SIMPLE_BOTTOM_LEFT_CORNER : BOTTOM_LEFT_CORNER;
		int[] right = simple ? SIMPLE_BOTTOM_RIGHT_CORNER : BOTTOM_RIGHT_CORNER;
		shape = new int[left.length + right.length + 4];
		int index = 0;
		shape[index++] = x;
		shape[index++] = y-highlight_header;
		for (int i = 0; i < left.length/2; i++) {
			shape[index++] = x+left[2*i];
			shape[index++] = y+height+left[2*i+1];
			if (borderLeft == 0) shape[index-1] += 1;
		}
		for (int i = 0; i < right.length/2; i++) {
			shape[index++] = x+width+right[2*i];
			shape[index++] = y+height+right[2*i+1];
			if (borderLeft == 0) shape[index-1] += 1;
		}
		shape[index++] = x+width;
		shape[index++] = y-highlight_header;
	} else {
		int[] left = simple ? SIMPLE_TOP_LEFT_CORNER : TOP_LEFT_CORNER;
		int[] right = simple ? SIMPLE_TOP_RIGHT_CORNER : TOP_RIGHT_CORNER;
		shape = new int[left.length + right.length + 4];
		int index = 0;
		shape[index++] = x;
		shape[index++] = y+height+highlight_header + 1;
		for (int i = 0; i < left.length/2; i++) {
			shape[index++] = x+left[2*i];
			shape[index++] = y+left[2*i+1];
		}
		for (int i = 0; i < right.length/2; i++) {
			shape[index++] = x+width+right[2*i];
			shape[index++] = y+right[2*i+1];
		}
		shape[index++] = x+width;
		shape[index++] = y+height+highlight_header + 1;
	}
	// Fill in background
	boolean bkSelected = single && selectedIndex != -1;
	drawBackground(gc, shape, bkSelected);
	// Fill in parent background for non-rectangular shape
	Region r = new Region();
	r.add(new Rectangle(x, y, width + 1, height + 1));
	r.subtract(shape);
	gc.setBackground(getParent().getBackground());
	fillRegion(gc, r);
	r.dispose();
	// Draw border line
	if (borderLeft > 0) {
		RGB outside = getParent().getBackground().getRGB();
		antialias(shape, borderColor.getRGB(), null, outside, gc);
		gc.setForeground(borderColor);
		gc.drawPolyline(shape);
	}	
	
	// Draw the unselected tabs.
	if (!single) {
		for (int i=0; i < items.length; i++) {
			if (i != selectedIndex && event.getBounds().intersects(items[i].getBounds())) {
				items[i].onPaint(gc, false);
			}
		}
	}
	
	// Draw selected tab
	if (selectedIndex != -1) {
		CTabItem item = items[selectedIndex];
		item.onPaint(gc, true);
	} else {
		// if no selected tab - draw line across bottom of all tabs
		int x1 = borderLeft;
		int y1 = (onBottom) ? size.y - borderBottom - tabHeight - 1 : borderTop + tabHeight;
		int x2 = size.x - borderRight;
		gc.setForeground(borderColor);
		gc.drawLine(x1, y1, x2, y1);
	}
	
	// Draw Buttons
	if (items.length > 0) {
		drawChevron(gc);
		drawMinimize(gc);
		drawMaximize(gc);
	}
	
	// Draw insertion mark
//	if (insertionIndex > -2) {
//		gc.setForeground(getDisplay().getSystemColor(SWT.COLOR_LIST_SELECTION));
//		if (insertionIndex == -1) {
//			Rectangle bounds = items[0].getBounds();
//			gc.drawLine(bounds.x, bounds.y, bounds.x, bounds.y + bounds.height - 1);
//			gc.drawLine(bounds.x - 2, bounds.y, bounds.x + 2, bounds.y);
//			gc.drawLine(bounds.x - 1, bounds.y + 1, bounds.x + 1, bounds.y + 1);
//			gc.drawLine(bounds.x - 1, bounds.y + bounds.height - 2, bounds.x + 1, bounds.y + bounds.height - 2);
//			gc.drawLine(bounds.x - 2, bounds.y + bounds.height - 1, bounds.x + 2, bounds.y + bounds.height - 1);
//
//		} else {
//			Rectangle bounds = items[insertionIndex].getBounds();
//			gc.drawLine(bounds.x + bounds.width, bounds.y, bounds.x + bounds.width, bounds.y + bounds.height - 1);
//			gc.drawLine(bounds.x + bounds.width - 2, bounds.y, bounds.x + bounds.width + 2, bounds.y);
//			gc.drawLine(bounds.x + bounds.width - 1, bounds.y + 1, bounds.x + bounds.width + 1, bounds.y + 1);
//			gc.drawLine(bounds.x + bounds.width - 1, bounds.y + bounds.height - 2, bounds.x + bounds.width + 1, bounds.y + bounds.height - 2);
//			gc.drawLine(bounds.x + bounds.width - 2, bounds.y + bounds.height - 1, bounds.x + bounds.width + 2, bounds.y + bounds.height - 1);
//		}
//	}
}
/**
 * Returns <code>true</code> if the receiver's border is visible.
 *
 * @return the receiver's border visibility 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>
 * 
 * @since 3.0
 */
public boolean getBorderVisible() {
	checkWidget();
	return borderLeft == 1;
}
public Rectangle getClientArea() {
	checkWidget();
	if (minimized) return new Rectangle(xClient, yClient, 0, 0);
	Point size = getSize();
	int width = size.x  - borderLeft - borderRight - 2*marginWidth - 2*highlight_margin;
	int height = size.y - borderTop - borderBottom - 2*marginHeight - highlight_margin - highlight_header;
	height -= tabHeight;
	return new Rectangle(xClient, yClient, width, height);
}
/**
 * Return the tab that is located at the specified index.
 * 
 * @param index the index of the tab item
 * @return the item at the specified index
 * 
 * @exception IllegalArgumentException <ul>
 *    <li>ERROR_INVALID_RANGE - if the index is out of range</li>
 * </ul>
 * 
 * @exception SWTError <ul>
 *    <li>ERROR_THREAD_INVALID_ACCESS when called from the wrong thread</li>
 *    <li>ERROR_WIDGET_DISPOSED when the widget has been disposed</li>
 * </ul>
 */
public CTabItem getItem (int index) {
	//checkWidget();
	if (index  < 0 || index >= items.length) 
		SWT.error(SWT.ERROR_INVALID_RANGE);
	return items [index];
}
/**
 * Gets the item at a point in the widget.
 *
 * @param pt the point in coordinates relative to the CTabFolder
 * @return the item at a point or null
 * 
 * @exception SWTError <ul>
 *		<li>ERROR_THREAD_INVALID_ACCESS when called from the wrong thread</li>
 *		<li>ERROR_WIDGET_DISPOSED when the widget has been disposed</li>
 *	</ul>
 */
public CTabItem getItem (Point pt) {
	//checkWidget();
	if (items.length == 0) return null;
	Point size = getSize();
	if (size.x <= borderLeft + borderRight) return null;
	for (int index = firstIndex; index < items.length; index++) {
		CTabItem item = items[index];
		Rectangle rect = item.getBounds();
		if (rect.contains(pt)) return item;
	}
	return null;
}
/**
 * Return the number of tabs in the folder.
 * 
 * @return the number of tabs in the folder