platform/platform-impl/src/com/intellij/ui/OneSideRoundedLineBorder.java

   1 /*
   2  * Copyright 2000-2009 JetBrains s.r.o.
   3  *
   4  * Licensed under the Apache License, Version 2.0 (the "License");
   5  * you may not use this file except in compliance with the License.
   6  * You may obtain a copy of the License at
   7  *
   8  * http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  * Unless required by applicable law or agreed to in writing, software
  11  * distributed under the License is distributed on an "AS IS" BASIS,
  12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  * See the License for the specific language governing permissions and
  14  * limitations under the License.
  15  */
  16 package com.intellij.ui;
  17
  18 import com.intellij.util.ui.UIUtil;
  19
  20 import javax.swing.border.LineBorder;
  21 import java.awt.*;
  22
  23 /**
  24  * @author Eugene Zhuravlev
  25  */
  26 public class OneSideRoundedLineBorder extends LineBorder {
  27   private final int myArcSize;
  28   private final int myRadius;
  29   private boolean myIsTopRounded;
  30   private boolean myIsBottomRounded;
  31   private boolean myDrawDottedAngledSide;
  32   private static final float[] DASH = new float[]{0, 2, 0, 2};
  33
  34
  35   public OneSideRoundedLineBorder(Color color, int arcSize) {
  36     this(color, arcSize, 1, true, false, false);
  37   }
  38
  39   public OneSideRoundedLineBorder(Color color, int arcSize, int thickness, boolean isTopRounded, boolean isBottomRounded, boolean drawDottedAngledSide) {
  40     super(color, thickness);
  41     myArcSize = arcSize;
  42     myIsTopRounded = isTopRounded;
  43     myIsBottomRounded = isBottomRounded;
  44     myRadius = myArcSize / 2;
  45     myDrawDottedAngledSide = drawDottedAngledSide;
  46   }
  47
  48
  49   public void paintBorder(Component c, Graphics g, int x, int y, int width, int height) {
  50     final Graphics2D g2 = (Graphics2D) g;
  51
  52     final Object oldAntialiasing = g2.getRenderingHint(RenderingHints.KEY_ANTIALIASING);
  53     g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
  54     final Color oldColor = g2.getColor();
  55     g2.setColor(lineColor);
  56
  57     for (int idx = 0; idx < thickness; idx++) {
  58       final int correctedHeight = height - idx - idx - 1;
  59       final int correctedWidth = width - idx - idx - 1;
  60       final int startX = x + idx;
  61       final int startY = y + idx;
  62
  63       if (myIsTopRounded && myIsBottomRounded) {
  64         g2.drawRoundRect(startX, startY, correctedWidth, correctedHeight, myArcSize, myArcSize);
  65       }
  66       else if (myIsTopRounded){
  67         UIUtil.drawLine(g2, startX + myRadius, startY, startX + correctedWidth - myRadius, startY); // top
  68         if (myDrawDottedAngledSide) {
  69           drawDottedLine(g2, startX, startY + correctedHeight, startX + correctedWidth, startY + correctedHeight); // bottom
  70         }
  71         else {
  72           UIUtil.drawLine(g2, startX, startY + correctedHeight, startX + correctedWidth, startY + correctedHeight); // bottom
  73         }
  74         g2.drawArc(startX, startY, myArcSize, myArcSize, 90, 90);
  75         g2.drawArc(startX + correctedWidth - myArcSize, startY, myArcSize, myArcSize, 0, 90);
  76         UIUtil.drawLine(g2, startX, startY + myRadius + 1, startX, startY + correctedHeight);  // left
  77         UIUtil.drawLine(g2, startX + correctedWidth, startY + myRadius + 1, startX + correctedWidth, startY + correctedHeight);  // right
  78       }
  79       else if (myIsBottomRounded) {
  80         // todo
  81       }
  82       else {
  83         g2.drawRect(startX, startY, correctedWidth, correctedHeight);
  84       }
  85     }
  86
  87     g2.setColor(oldColor);
  88     g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING, oldAntialiasing);
  89   }
  90
  91   private void drawDottedLine(Graphics2D g, int x1, int y1, int x2, int y2) {
  92     final Stroke saved = g.getStroke();
  93     g.setStroke(new BasicStroke(1, BasicStroke.CAP_ROUND, BasicStroke.JOIN_ROUND, 0, DASH, y1 % 2));
  94
  95     UIUtil.drawLine(g, x1, y1, x2, y2);
  96
  97     g.setStroke(saved);
  98   }
  99 }