paletteshelfstrategy.java

利用它可以做出非常漂亮的swt界面,包含的组件有PShelf Plist

package com.swtplus.widgets.shelf;

import org.eclipse.swt.SWT;
import org.eclipse.swt.graphics.Color;
import org.eclipse.swt.graphics.GC;

import com.swtplus.widgets.PShelf;
import com.swtplus.widgets.PShelfItem;

public class PaletteShelfStrategy implements IShelfStrategy {
	
	private int textMargin = 2;
	private int margin = 2;
	private PShelf parent;
	private int spacing = 4;
	
	private Color shadeColor;
	
	public static final int CENTER = 1 << 1;
	
	private boolean center = false;
	
	public PaletteShelfStrategy(int style) {
		
		if ((style & CENTER) == CENTER)
            center = true;		
	}

	/* (non-Javadoc)
	 * @see com.swtplus.widgets.shelf.IShelfStrategy#computeHeight(com.swtplus.widgets.shelf.ShelfItem, org.eclipse.swt.graphics.GC)
	 */
	public int computeHeight(PShelfItem item, GC gc){
		if (item.getImage() == null)
			return gc.getFontMetrics().getHeight() + (2*(margin+textMargin));
		
		int h = Math.max(item.getImage().getBounds().height,gc.getFontMetrics().getHeight() + (2*textMargin)) + (2*margin);
		
		if (h % 2 != 0)
			h ++;
		
		return h;
	}
	
	/* (non-Javadoc)
	 * @see com.swtplus.widgets.shelf.IShelfStrategy#paintItem(com.swtplus.widgets.shelf.ShelfItem, org.eclipse.swt.graphics.GC, int, int, int, boolean, boolean, boolean, boolean, boolean)
	 */
	public void paintItem(PShelfItem item,GC gc,int y,int height,int width,boolean open,boolean focus,boolean hover,boolean showPin, boolean pinned){
		
		//Color back = parent.getBackground();
		Color fore = parent.getForeground();
		
		gc.fillRectangle(0,y,width-1,height-1);		
		
		gc.setForeground(shadeColor);
		gc.fillGradientRectangle(0,y,40,height-1,false);
		
		gc.setForeground(parent.getDisplay().getSystemColor(SWT.COLOR_WIDGET_HIGHLIGHT_SHADOW));
		gc.drawLine(0,y,0,y +height -1);
		gc.drawLine(0,y,width -1,y);
		
		gc.setForeground(parent.getDisplay().getSystemColor(SWT.COLOR_WIDGET_NORMAL_SHADOW));
		gc.drawLine(0,y +height -1,width-1,y +height-1);
		gc.drawLine(width-1,y,width-1,y +height-1);
		
		int x = 6;
		if (item.getImage() != null){
			int y2 = (height - item.getImage().getBounds().height)/2;
			if ((height - item.getImage().getBounds().height) % 2 != 0)
				y2 ++;
			
			gc.drawImage(item.getImage(),x,y + y2);
			
			x += item.getImage().getBounds().width + spacing;
		}
		gc.setForeground(fore);
		
		int y2 = (height - gc.getFontMetrics().getHeight())/2;
		if ((height - gc.getFontMetrics().getHeight()) % 2 != 0)
			y2 ++;
		
		if (center){
			x = (width - gc.stringExtent(item.getText()).x)/2;
		}
		
		gc.drawString(item.getText(),x,y +y2,true);
		
		if (focus){
			gc.drawFocus(1,1,width-2,height-1);
		}
	}
	
	/* (non-Javadoc)
	 * @see com.swtplus.widgets.shelf.IShelfStrategy#initialize(com.swtplus.widgets.shelf.PShelf)
	 */
	public void initialize(PShelf parent){
		this.parent = parent;
		shadeColor = parent.getDisplay().getSystemColor(SWT.COLOR_WIDGET_NORMAL_SHADOW);
	}

	public Color getShadeColor() {
		return shadeColor;
	}

	public void setShadeColor(Color shadeColor) {
		this.shadeColor = shadeColor;
	}

	public void dispose() {
	
	}

	public boolean isOpenOnTop() {
		return false;
	}

}