platform/util/src/com/intellij/ui/SideBorder.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
  17 package com.intellij.ui;
  18
  19 import com.intellij.util.ui.UIUtil;
  20
  21 import javax.swing.border.LineBorder;
  22 import java.awt.*;
  23
  24 public class SideBorder extends LineBorder {
  25   public static final int LEFT = 0x01;
  26   public static final int TOP = 0x02;
  27   public static final int RIGHT = 0x04;
  28   public static final int BOTTOM = 0x08;
  29   public static final int ALL = LEFT | TOP | RIGHT | BOTTOM;
  30   private final int mySideMask;
  31
  32   public SideBorder(Color color, int mask) {
  33     super(color, 1);
  34     mySideMask = mask;
  35   }
  36
  37   public Insets getBorderInsets(Component component) {
  38     return new Insets(
  39       (mySideMask & TOP) != 0 ? getThickness() : 0,
  40       (mySideMask & LEFT) != 0 ? getThickness() : 0,
  41       (mySideMask & BOTTOM) != 0 ? getThickness() : 0,
  42       (mySideMask & RIGHT) != 0 ? getThickness() : 0
  43     );
  44   }
  45
  46   public Insets getBorderInsets(Component component, Insets insets) {
  47     insets.top = (mySideMask & TOP) != 0 ? getThickness() : 0;
  48     insets.left = (mySideMask & LEFT) != 0 ? getThickness() : 0;
  49     insets.bottom = (mySideMask & BOTTOM) != 0 ? getThickness() : 0;
  50     insets.right = (mySideMask & RIGHT) != 0 ? getThickness() : 0;
  51     return insets;
  52   }
  53
  54   public void paintBorder(Component c, Graphics g, int x, int y, int width, int height) {
  55     Color oldColor = g.getColor();
  56     int i;
  57
  58     g.setColor(getLineColor());
  59     for(i = 0; i < getThickness(); i++){
  60       if ((mySideMask & LEFT) != 0){
  61         UIUtil.drawLine(g, x + i, y + i, x + i, height - i - i - 1);
  62       }
  63       if ((mySideMask & TOP) != 0){
  64         UIUtil.drawLine(g, x + i, y + i, width - i - i - 1, y + i);
  65       }
  66       if ((mySideMask & RIGHT) != 0){
  67         UIUtil.drawLine(g, width - i - i - 1, y + i, width - i - i - 1, height - i - i - 1);
  68       }
  69       if ((mySideMask & BOTTOM) != 0){
  70         UIUtil.drawLine(g, x + i, height - i - i - 1, width - i - i - 1, height - i - i - 1);
  71       }
  72     }
  73     g.setColor(oldColor);
  74   }
  75
  76   public void setLineColor(Color color) {
  77     lineColor = color;
  78   }
  79 }