panelwindowcontainer.java

用java 编写的源码开放的文本编辑器。有很多有用的特性

			{
				g.setColor(color1);
				g.drawLine(x + i * 4 + 2,y + 3,
					x + i * 4 + 2,y + 3);
				g.setColor(color2);
				g.drawLine(x + i * 4 + 3,y + 4,
					x + i * 4 + 3,y + 4);
				g.setColor(color1);
				g.drawLine(x + i * 4 + 4,y + 5,
					x + i * 4 + 4,y + 5);
				g.setColor(color2);
				g.drawLine(x + i * 4 + 5,y + 6,
					x + i * 4 + 5,y + 6);
			}
		} //}}}

		//{{{ paintVertBorder() method
		private void paintVertBorder(Graphics g, int x, int y, int height)
		{
			g.setColor(color3);
			g.fillRect(x,y,SPLITTER_WIDTH,height);

			for(int i = 0; i < height / 4 - 1; i++)
			{
				g.setColor(color1);
				g.drawLine(x + 3,y + i * 4 + 2,
					x + 3,y + i * 4 + 2);
				g.setColor(color2);
				g.drawLine(x + 4,y + i * 4 + 3,
					x + 4,y + i * 4 + 3);
				g.setColor(color1);
				g.drawLine(x + 5,y + i * 4 + 4,
					x + 5,y + i * 4 + 4);
				g.setColor(color2);
				g.drawLine(x + 6,y + i * 4 + 5,
					x + 6,y + i * 4 + 5);
			}
		} //}}}

		//{{{ updateColors() method
		private void updateColors()
		{
			if(UIManager.getLookAndFeel() instanceof MetalLookAndFeel)
			{
				color1 = MetalLookAndFeel.getControlHighlight();
				color2 = MetalLookAndFeel.getControlDarkShadow();
				color3 = MetalLookAndFeel.getControl();
			}
			else
			{
				color1 = color2 = color3 = null;
			}
		} //}}}
	} //}}}

	//{{{ RotatedTextIcon class
	public static class RotatedTextIcon implements Icon
	{
		public static final int NONE = 0;
		public static final int CW = 1;
		public static final int CCW = 2;

		//{{{ RotatedTextIcon constructor
		public RotatedTextIcon(int rotate, Font font, String text)
		{
			this.rotate = rotate;
			this.font = font;

			FontRenderContext fontRenderContext
				= new FontRenderContext(null,true,true);
			this.text = text;
			glyphs = font.createGlyphVector(fontRenderContext,text);
			width = (int)glyphs.getLogicalBounds().getWidth() + 4;
			//height = (int)glyphs.getLogicalBounds().getHeight();

			LineMetrics lineMetrics = font.getLineMetrics(text,fontRenderContext);
			ascent = lineMetrics.getAscent();
			height = (int)lineMetrics.getHeight();

			renderHints = new RenderingHints(
				RenderingHints.KEY_ANTIALIASING,
				RenderingHints.VALUE_ANTIALIAS_ON);
			renderHints.put(RenderingHints.KEY_FRACTIONALMETRICS,
				RenderingHints.VALUE_FRACTIONALMETRICS_ON);
			renderHints.put(RenderingHints.KEY_RENDERING,
				RenderingHints.VALUE_RENDER_QUALITY);
		} //}}}

		//{{{ getIconWidth() method
		public int getIconWidth()
		{
			return (int)(rotate == RotatedTextIcon.CW
				|| rotate == RotatedTextIcon.CCW
				? height : width);
		} //}}}

		//{{{ getIconHeight() method
		public int getIconHeight()
		{
			return (int)(rotate == RotatedTextIcon.CW
				|| rotate == RotatedTextIcon.CCW
				? width : height);
		} //}}}

		//{{{ paintIcon() method
		public void paintIcon(Component c, Graphics g, int x, int y)
		{
			Graphics2D g2d = (Graphics2D)g;
			g2d.setFont(font);
			AffineTransform oldTransform = g2d.getTransform();
			RenderingHints oldHints = g2d.getRenderingHints();

			g2d.setRenderingHints(renderHints);
			g2d.setColor(c.getForeground());

			//{{{ No rotation
			if(rotate == RotatedTextIcon.NONE)
			{
				g2d.drawGlyphVector(glyphs,x + 2,y + ascent);
			} //}}}
			//{{{ Clockwise rotation
			else if(rotate == RotatedTextIcon.CW)
			{
				AffineTransform trans = new AffineTransform();
				trans.concatenate(oldTransform);
				trans.translate(x,y + 2);
				trans.rotate(Math.PI / 2,
					height / 2, width / 2);
				g2d.setTransform(trans);
				g2d.drawGlyphVector(glyphs,(height - width) / 2,
					(width - height) / 2
					+ ascent);
			} //}}}
			//{{{ Counterclockwise rotation
			else if(rotate == RotatedTextIcon.CCW)
			{
				AffineTransform trans = new AffineTransform();
				trans.concatenate(oldTransform);
				trans.translate(x,y - 2);
				trans.rotate(Math.PI * 3 / 2,
					height / 2, width / 2);
				g2d.setTransform(trans);
				g2d.drawGlyphVector(glyphs,(height - width) / 2,
					(width - height) / 2
					+ ascent);
			} //}}}

			g2d.setTransform(oldTransform);
			g2d.setRenderingHints(oldHints);
		} //}}}

		//{{{ Private members
		private int rotate;
		private Font font;
		private String text;
		private GlyphVector glyphs;
		private float width;
		private float height;
		private float ascent;
		private RenderingHints renderHints;
		//}}}
	} //}}}

	//{{{ ButtonLayout class
	class ButtonLayout implements LayoutManager
	{
		//{{{ addLayoutComponent() method
		public void addLayoutComponent(String name, Component comp) {} //}}}

		//{{{ removeLayoutComponent() method
		public void removeLayoutComponent(Component comp) {} //}}}

		//{{{ preferredLayoutSize() method
		public Dimension preferredLayoutSize(Container parent)
		{
			Insets insets = ((JComponent)parent).getBorder()
				.getBorderInsets((JComponent)parent);

			Component[] comp = parent.getComponents();
			if(comp.length == 2)
			{
				// nothing 'cept close box and popup button
				return new Dimension(0,0);
			}
			else
			{
				if(position.equals(DockableWindowManager.TOP)
					|| position.equals(DockableWindowManager.BOTTOM))
				{
					return new Dimension(0,
						comp[2].getPreferredSize().height
						+ insets.top
						+ insets.bottom);
				}
				else
				{
					return new Dimension(
						comp[2].getPreferredSize().width
						+ insets.left + insets.right,0);
				}
			}
		} //}}}

		//{{{ minimumLayoutSize() method
		public Dimension minimumLayoutSize(Container parent)
		{
			return preferredLayoutSize(parent);
		} //}}}

		//{{{ layoutContainer() method
		public void layoutContainer(Container parent)
		{
			Insets insets = ((JComponent)parent).getBorder()
				.getBorderInsets((JComponent)parent);

			Component[] comp = parent.getComponents();
			if(comp.length != 2)
			{
				boolean closeBoxSizeSet = false;
				boolean noMore = false;
				popupButton.setVisible(false);

				Dimension parentSize = parent.getSize();
				int pos = (position.equals(DockableWindowManager.TOP)
					|| position.equals(DockableWindowManager.BOTTOM)
					) ? 0 : insets.left;

				for(int i = 2; i < comp.length; i++)
				{
					Dimension size = comp[i].getPreferredSize();
					if(position.equals(DockableWindowManager.TOP)
						|| position.equals(DockableWindowManager.BOTTOM))
					{
						if(!closeBoxSizeSet)
						{
							closeBox.setBounds(pos,
								insets.top,
								size.height,size.height);
							pos += size.height;
							closeBoxSizeSet = true;
						}

						if(noMore || pos + size.width > parentSize.width
							- (i == comp.length - 1
							? 0 : closeBox.getWidth()))
						{
							popupButton.setBounds(
								parentSize.width - size.height
								- insets.right,
								insets.top,size.height,
								size.height);
							popupButton.setVisible(true);
							comp[i].setVisible(false);
							noMore = true;
						}
						else
						{
							comp[i].setBounds(pos,insets.top,
								size.width,size.height);
							comp[i].setVisible(true);
							pos += size.width;
						}
					}
					else
					{
						if(!closeBoxSizeSet)
						{
							closeBox.setBounds(insets.left,
								insets.top,size.width,size.width);
							pos += size.width;
							closeBoxSizeSet = true;
						}

						if(noMore || pos + size.height > parentSize.height
							- (i == comp.length - 1
							? 0 : closeBox.getHeight()))
						{
							popupButton.setBounds(
								insets.top,
								parentSize.height - size.width,
								size.width,size.width);
							popupButton.setVisible(true);
							comp[i].setVisible(false);
							noMore = true;
						}
						else
						{
							comp[i].setBounds(insets.left,
								pos,size.width,size.height);
							comp[i].setVisible(true);
							pos += size.height;
						}
					}
				}
			}
		} //}}}
	} //}}}

	//{{{ DockablePanel class
	class DockablePanel extends JPanel
	{
		//{{{ DockablePanel constructor
		DockablePanel()
		{
			super(new CardLayout());

			ResizeMouseHandler resizeMouseHandler = new ResizeMouseHandler();
			addMouseListener(resizeMouseHandler);
			addMouseMotionListener(resizeMouseHandler);
		} //}}}

		//{{{ getWindowContainer() method
		PanelWindowContainer getWindowContainer()
		{
			return PanelWindowContainer.this;
		} //}}}

		//{{{ showDockable() method
		void showDockable(String name)
		{
			((CardLayout)getLayout()).show(this,name);
		} //}}}

		//{{{ getMinimumSize() method
		public Dimension getMinimumSize()
		{
			return new Dimension(0,0);
		} //}}}

		//{{{ getPreferredSize() method
		public Dimension getPreferredSize()
		{
			if(current == null)
				return new Dimension(0,0);
			else
			{
				if(dimension <= 0)
				{
					int width = super.getPreferredSize().width;
					dimension = width - SPLITTER_WIDTH - 3;
				}

				if(position.equals(DockableWindowManager.TOP)
					|| position.equals(DockableWindowManager.BOTTOM))
				{
					return new Dimension(0,
						dimension + SPLITTER_WIDTH + 3);
				}
				else
				{
					return new Dimension(dimension + SPLITTER_WIDTH + 3,
						0);
				}
			}
		} //}}}

		//{{{ ResizeMouseHandler class
		class ResizeMouseHandler extends MouseAdapter implements MouseMotionListener
		{
			boolean canDrag;
			int dragStartDimension;
			Point dragStart;

			//{{{ mousePressed() method
			public void mousePressed(MouseEvent evt)
			{
				dragStartDimension = dimension;
				dragStart = evt.getPoint();
			} //}}}

			//{{{ mouseMoved() method
			public void mouseMoved(MouseEvent evt)
			{
				Border border = getBorder();
				if(border == null)
				{
					// collapsed
					return;
				}

				Insets insets = border.getBorderInsets(DockablePanel.this);
				int cursor = Cursor.DEFAULT_CURSOR;
				canDrag = false;
				//{{{ Top...
				if(position.equals(DockableWindowManager.TOP))
				{
					if(evt.getY() >= getHeight() - insets.bottom)
					{
						cursor = Cursor.N_RESIZE_CURSOR;
						canDrag = true;
					}
				} //}}}
				//{{{ Left...
				else if(position.equals(DockableWindowManager.LEFT))
				{
					if(evt.getX() >= getWidth() - insets.right)
					{
						cursor = Cursor.W_RESIZE_CURSOR;
						canDrag = true;
					}
				} //}}}
				//{{{ Bottom...
				else if(position.equals(DockableWindowManager.BOTTOM))
				{
					if(evt.getY() <= insets.top)
					{
						cursor = Cursor.S_RESIZE_CURSOR;
						canDrag = true;
					}
				} //}}}
				//{{{ Right...
				else if(position.equals(DockableWindowManager.RIGHT))
				{
					if(evt.getX() <= insets.left)
					{
						cursor = Cursor.E_RESIZE_CURSOR;
						canDrag = true;
					}
				} //}}}

				setCursor(Cursor.getPredefinedCursor(cursor));
			} //}}}

			//{{{ mouseDragged() method
			public void mouseDragged(MouseEvent evt)
			{
				if(!canDrag)
					return;

				if(dragStart == null) // can't happen?
					return;

				//{{{ Top...
				if(position.equals(DockableWindowManager.TOP))
				{
					dimension = evt.getY()
						+ dragStartDimension
						- dragStart.y;
				} //}}}
				//{{{ Left...
				else if(position.equals(DockableWindowManager.LEFT))
				{
					dimension = evt.getX()
						+ dragStartDimension
						- dragStart.x;
				} //}}}
				//{{{ Bottom...
				else if(position.equals(DockableWindowManager.BOTTOM))
				{
					dimension += (dragStart.y - evt.getY());
				} //}}}
				//{{{ Right...
				else if(position.equals(DockableWindowManager.RIGHT))
				{
					dimension += (dragStart.x - evt.getX());
				} //}}}

				if(dimension <= 0)
					dimension = dragStartDimension;

				wm.invalidate();
				wm.validate();
			} //}}}

			//{{{ mouseExited() method
			public void mouseExited(MouseEvent evt)
			{
				setCursor(Cursor.getPredefinedCursor(
					Cursor.DEFAULT_CURSOR));
			} //}}}
		} //}}}
	} //}}}

	//}}}
}