paintbrush.txt

java编画图软件

    		g2d_bufImg.setPaint(Color.WHITE);
			g2d_bufImg.fill(new Rectangle2D.Double((int)rectangle2D_select.getX(),(int)rectangle2D_select.getY(),(int)rectangle2D_select.getWidth(),(int)rectangle2D_select.getHeight()));
			
			redo_lim=count++;
			jMenuItem[1][1].setEnabled(false);
			
   			//新增一张BufferedImage形态至bufImg_data[count]，并将bufImg绘制至bufImg_data[count]//
   			bufImg_data[count] = new BufferedImage(draw_panel_width, draw_panel_height, BufferedImage.TYPE_3BYTE_BGR);
   			Graphics2D g2d_bufImg_data = (Graphics2D) bufImg_data[count].getGraphics();
   			g2d_bufImg_data.drawImage(bufImg,0,0,this);

			//判断坐标为新起点//
			press=0;
			
			//让复原MenuItem可以点选//
   			if(count>0)
   				jMenuItem[1][0].setEnabled(true);
   			jMenuItem[1][2].setEnabled(false);
   			jMenuItem[1][3].setEnabled(false);
			jMenuItem[1][4].setEnabled(true);
			cut=3;
			repaint();
		}
		public void copy(){
			bufImg_cut = new BufferedImage((int)rectangle2D_select.getWidth(), (int)rectangle2D_select.getHeight(), BufferedImage.TYPE_3BYTE_BGR);
			BufferedImage copy = bufImg.getSubimage((int)rectangle2D_select.getX(),(int)rectangle2D_select.getY(),(int)rectangle2D_select.getWidth(),(int)rectangle2D_select.getHeight());
			Graphics2D g2d_bufImg_cut = (Graphics2D) bufImg_cut.createGraphics();
			g2d_bufImg_cut.drawImage(copy,0,0,this);
			jMenuItem[1][4].setEnabled(true);
			cut=1;
			repaint();
		}
		public void paste(){
			cut=2;
			repaint();
		}
    	public void mousePressed(MouseEvent e) {
    		x1=e.getX();
    		y1=e.getY();
    		if(first==0){
    			polygon = new Polygon();
				polygon.addPoint(x1, y1);
				first=1;
			}
			//判断坐标为新起点//
			press=1;
			chk=0;
			if(cut!=2) cut=0;
		}

    	public void mouseReleased(MouseEvent e) {
    		x2=e.getX();
    		y2=e.getY();
    		
    		if(step_chk==0)//控制贝氏曲线用
    			step=1;
    		else if(step_chk==1)
    			step=2;
    		
    		if(step_chk_arc==0)//控制扇型用
    			chk=step_arc=1;
    		else if(step_chk_arc==1)
    			chk=step_arc=2;
			
			if(drawMethod==6 && click!=1){
				polygon.addPoint(x2, y2);
				repaint();
			}
			if(drawMethod==10){
				if(cut!=2) cut=1;
				select_x=(int)rectangle2D_select.getX();
				select_y=(int)rectangle2D_select.getY();
				select_w=(int)rectangle2D_select.getWidth();
				select_h=(int)rectangle2D_select.getHeight();
				jMenuItem[1][2].setEnabled(true);
				jMenuItem[1][3].setEnabled(true);
			}

    		if((step_chk==2 && step==2) || (step_chk_arc==2 && step_arc==2) || drawMethod==0 || drawMethod==1 || drawMethod==2 || drawMethod==3 || drawMethod==7 || drawMethod==8 || drawMethod==9 || cut==2){//當不是畫貝氏曲線或是已經完成貝氏曲線時畫
				toDraw();
    		}
		}
		public void clear(){
			cut=select_x=select_y=select_w=select_h=step_chk_arc=step_arc=first=step_chk=step=0;
			x1=x2=y1=y2=-1;
		}
		
		public void toDraw(){
			if(x1<0 || y1<0) return;//防止误按
			chk=3;
			draw(x1,y1,x2,y2);
			
			//画出图形至bufImg//
			Graphics2D g2d_bufImg = (Graphics2D) bufImg.getGraphics();
			if(cut!=2){
				if(color_inside!=null && drawMethod!=8){
					g2d_bufImg.setPaint(color_inside);
					g2d_bufImg.fill(shape);
				}
				if(color_border!=null && drawMethod!=8){
					g2d_bufImg.setPaint(color_border);
					g2d_bufImg.setStroke(stroke);
					g2d_bufImg.draw(shape);
				}
			}
			else{
   				g2d_bufImg.drawImage(bufImg_cut,x2,y2,this);
			}
			repaint();
			clear();
			//记录可重做最大次数，並让重做不可按//
			redo_lim=count++;
			jMenuItem[1][1].setEnabled(false);
			
   			//新增一张BufferedImage形态至bufImg_data[count]，并将bufImg绘制至bufImg_data[count]//
   			bufImg_data[count] = new BufferedImage(draw_panel_width, draw_panel_height, BufferedImage.TYPE_3BYTE_BGR);
   			Graphics2D g2d_bufImg_data = (Graphics2D) bufImg_data[count].getGraphics();
   			g2d_bufImg_data.drawImage(bufImg,0,0,this);
   			
			//判断界面为新起点//
			press=0;
			
			//让复原MenuItem可以点选//
   			if(count>0)
   				jMenuItem[1][0].setEnabled(true);
		}
		
    	public void mouseEntered(MouseEvent e){}
    	public void mouseExited(MouseEvent e){}
    	public void mouseClicked(MouseEvent e){
    		if(click==1){//双击时
    			toDraw();
    		}
    		click=1;
    	}
    	
    	public void mouseDragged(MouseEvent e){
    		x2=e.getX();
    		y2=e.getY();
    		if(drawMethod==7 || drawMethod==8){
				draw(x1,y1,x2,y2);
				x1=e.getX();
				y1=e.getY();
			}
			if(drawMethod!=9)
    			repaint();
    	}

    	public void mouseMoved(MouseEvent e) {
			show_x=x2=e.getX();
			show_y=y2=e.getY();
    		
			jLabel[0].setText(show_x+","+show_y);
			click=0;
			if(drawMethod==7 || drawMethod==8 || cut==2)
				repaint();
    	}
		
		public void draw(int input_x1,int input_y1,int input_x2,int input_y2){
			if(drawMethod==0){//直线时，让shape为Line2D
				shape=line2D;
				line2D.setLine(input_x1,input_y1,input_x2,input_y2);
			}
			else if(drawMethod==1){//矩型時，让shape为Rectangle2D
				shape=rectangle2D;
				rectangle2D.setRect(Math.min(input_x1,input_x2),Math.min(input_y1,input_y2),Math.abs(input_x1-input_x2),Math.abs(input_y1-input_y2));
			}
			else if(drawMethod==2){//椭圆
				shape=ellipse2D;
				ellipse2D.setFrame(Math.min(input_x1,input_x2),Math.min(input_y1,input_y2),Math.abs(input_x1-input_x2),Math.abs(input_y1-input_y2));
			}
			else if(drawMethod==3){//圆角矩型
				shape=roundRectangle2D;
				roundRectangle2D.setRoundRect(Math.min(input_x1,input_x2),Math.min(input_y1,input_y2),Math.abs(input_x1-input_x2),Math.abs(input_y1-input_y2),10.0f,10.0f);
			}
			else if(drawMethod==4){//贝氏曲線
				shape=cubicCurve2D;
				if(step==0){
					cubicCurve2D.setCurve(input_x1,input_y1,input_x1,input_y1,input_x2,input_y2,input_x2,input_y2);
					temp_x1=input_x1;
					temp_y1=input_y1;
					temp_x2=input_x2;
					temp_y2=input_y2;
					step_chk=0;
				}
				else if(step==1){
					cubicCurve2D.setCurve(temp_x1,temp_y1,input_x2,input_y2,input_x2,input_y2,temp_x2,temp_y2);
					temp_x3=input_x2;
					temp_y3=input_y2;
					step_chk=1;
				}
				else if(step==2){
					cubicCurve2D.setCurve(temp_x1,temp_y1,temp_x3,temp_y3,input_x2,input_y2,temp_x2,temp_y2);
					step_chk=2;
				}
			}
			else if(drawMethod==5){//扇型，chk用來防止意外的repaint//
				if(step_arc==0 || chk==1){//步驟控制
					shape=ellipse2D;
					ellipse2D.setFrame(Math.min(input_x1,input_x2),Math.min(input_y1,input_y2),Math.abs(input_x1-input_x2),Math.abs(input_y1-input_y2));
					temp_x1=input_x1;
					temp_y1=input_y1;
					temp_x2=input_x2;
					temp_y2=input_y2;
					step_chk_arc=0;
				}
				else if(step_arc==1 || chk==2){//步骤控制
					shape=arc2D;

					center_point_x = Math.min(temp_x1,temp_x2)+Math.abs(temp_x1-temp_x2)/2;
					center_point_y = Math.min(temp_y1,temp_y2)+Math.abs(temp_y1-temp_y2)/2;
					
					double a = Math.pow(Math.pow(input_x2-center_point_x,2)+Math.pow(input_y2-center_point_y,2),0.5);
					double b = input_x2-center_point_x;
					if(input_y2>center_point_y)
						start=360+Math.acos(b/a)/Math.PI*-180;
					else
						start=Math.acos(b/a)/Math.PI*180;
					
					arc2D.setArc(Math.min(temp_x1,temp_x2),Math.min(temp_y1,temp_y2),Math.abs(temp_x1-temp_x2),Math.abs(temp_y1-temp_y2),start,0,pie_shape);
					step_chk_arc=1;
				}
				else if(step_arc==2 || chk==3){//步骤控制
					shape=arc2D;
					
					double a = Math.pow(Math.pow(input_x2-center_point_x,2)+Math.pow(input_y2-center_point_y,2),0.5);
					double b = input_x2-center_point_x;
					if(input_y2>center_point_y)
						end=360+Math.acos(b/a)/Math.PI*-180-start;
					else
						end=Math.acos(b/a)/Math.PI*180-start;
					if(end<0){end=360-Math.abs(end);}
					
					arc2D.setArc(Math.min(temp_x1,temp_x2),Math.min(temp_y1,temp_y2),Math.abs(temp_x1-temp_x2),Math.abs(temp_y1-temp_y2),start,end,pie_shape);
					step_chk_arc=2;
				}
			}
			else if(drawMethod==6){//多边型
				shape=polygon;
			}
			else if(drawMethod==7 || drawMethod==8){//任意线＆橡皮擦
    			Graphics2D g2d_bufImg = (Graphics2D) bufImg.getGraphics();
    			
    			shape=line2D;
				line2D.setLine(input_x1,input_y1,input_x2,input_y2);
				if(drawMethod==7)
					g2d_bufImg.setPaint(color_border);
				else
					g2d_bufImg.setPaint(Color.white);
				g2d_bufImg.setStroke(stroke);
				g2d_bufImg.draw(shape);
			}
			
			else if(drawMethod==9){//文字
				Graphics2D g2d_bufImg = (Graphics2D) bufImg.getGraphics();
        		FontRenderContext frc = g2d_bufImg.getFontRenderContext();
        		jDialog.show();
        		
        		Font f = new Font(textField_font.getText(),valBold + valItalic,size);
        		TextLayout tl = new TextLayout(textField_word.getText(), f, frc);
        		double sw = tl.getBounds().getWidth();
        		double sh = tl.getBounds().getHeight();

        		AffineTransform Tx = AffineTransform.getScaleInstance(1, 1);
        		Tx.translate(input_x2,input_y2+sh);
        		shape = tl.getOutline(Tx);
			}
			else if(drawMethod==10){//选取工具
				shape=rectangle2D;
				rectangle2D.setRect(Math.min(input_x1,input_x2),Math.min(input_y1,input_y2),Math.abs(input_x1-input_x2),Math.abs(input_y1-input_y2));
			}
			if(color_border instanceof GradientPaint){//使用渐层填色读取拖拉坐标
				color_border = new GradientPaint( input_x1,input_y1, (Color)((GradientPaint)color_border).getColor1(), input_x2,input_y2, (Color)((GradientPaint)color_border).getColor2(), true );
			}
			if(color_inside instanceof GradientPaint){
				color_inside = new GradientPaint( input_x1,input_y1, (Color)((GradientPaint)color_inside).getColor1(), input_x2,input_y2, (Color)((GradientPaint)color_inside).getColor2(), true );
			}
		}
		
		public void paint(Graphics g) {
			Graphics2D g2d = (Graphics2D) g;
			super.paint(g2d);//重回底层JPanel以及上面所有元件

			if(press==1 && drawMethod!=10 && !(x1<0 || y1<0)) {//绘图在最上面的JLabel上，并判断是不是起点才画
				draw(x1,y1,x2,y2);
				if(drawMethod==8) return;
				if(color_inside!=null){
					g2d.setPaint(color_inside);
					g2d.fill(shape);
				}
				if(color_border!=null){
					g2d.setPaint(color_border);
					g2d.setStroke(stroke);
					g2d.draw(shape);
				}
			}

			if(drawMethod==10 && cut==0){//选取选取控制、判断是否选取、剪下、或贴上上
				g2d.setPaint(Color.black);
				g2d.setStroke(basicStroke_select);
				rectangle2D_select.setRect(Math.min(x1,x2),Math.min(y1,y2),Math.abs(x1-x2),Math.abs(y1-y2));
				g2d.draw(rectangle2D_select);
			}
			if(cut==1){
				g2d.setPaint(Color.black);
				g2d.setStroke(basicStroke_select);
				rectangle2D_select.setRect(select_x,select_y,select_w,select_h);
				g2d.draw(rectangle2D_select);
			}
			if(cut==2){
   				g2d.drawImage(bufImg_cut,x2,y2,this);
   			}

			//跟随游标的圆形//
			if(drawMethod==7 || drawMethod==8){
				g2d.setPaint(Color.black);
				g2d.setStroke(basicStroke_pen);
				ellipse2D_pan.setFrame(x2-setPanel.number/2,y2-setPanel.number/2,setPanel.number,setPanel.number);
				g2d.draw(ellipse2D_pan);
			}
		}
	}

	public static void main( String args[] ){
		try{UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());} // 此类跟踪当前的外观及其默认设置
		catch(Exception e){e.printStackTrace();} //将此 throwable 及其追踪输出至标准错误流
		
		Painter app = new Painter();
		app.setVisible(true);
		app.setExtendedState(Frame.MAXIMIZED_BOTH);//面板最大化
	}
  }