DarculaButtonPainter.java

/*
 * Copyright 2000-2015 JetBrains s.r.o.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.intellij.ide.ui.laf.darcula.ui;

import com.intellij.ide.ui.laf.darcula.DarculaUIUtil;
import com.intellij.openapi.actionSystem.ActionToolbar;
import com.intellij.openapi.ui.GraphicsConfig;
import com.intellij.ui.Gray;
import com.intellij.util.ui.JBUI;
import com.intellij.util.ui.UIUtil;

import javax.swing.*;
import javax.swing.border.Border;
import javax.swing.plaf.UIResource;
import java.awt.*;

/**
 * @author Konstantin Bulenkov
 */
public class DarculaButtonPainter implements Border, UIResource {
  private static final int myOffset = 4;

  @Override
  public void paintBorder(Component c, Graphics g, int x, int y, int width, int height) {
    final Graphics2D g2d = (Graphics2D)g;
    final Insets ins = getBorderInsets(c);
    final int yOff = (ins.top + ins.bottom) / 4;
    final boolean square = DarculaButtonUI.isSquare(c);
    int offset = JBUI.scale(square ? 1 : getOffset());
    int w = c.getWidth();
    int h = c.getHeight();
    int diam = JBUI.scale(22);

    if (c.hasFocus()) {
      if (DarculaButtonUI.isHelpButton((JComponent)c)) {
          DarculaUIUtil.paintFocusOval(g2d, (w - diam) / 2, (h - diam) / 2, diam, diam);
      } else {
        DarculaUIUtil.paintFocusRing(g2d, new Rectangle(offset, yOff, width - 2 * offset, height - 2 * yOff));
      }
    } else {
      final GraphicsConfig config = new GraphicsConfig(g);
      g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
      g2d.setRenderingHint(RenderingHints.KEY_STROKE_CONTROL, RenderingHints.VALUE_STROKE_DEFAULT);
      g2d.setPaint(UIUtil.getGradientPaint(width / 2, y + yOff + JBUI.scale(1), Gray._80.withAlpha(90), width / 2, height - 2 * yOff, Gray._90.withAlpha(90)));
      //g.drawRoundRect(x + offset + 1, y + yOff + 1, width - 2 * offset, height - 2*yOff, 5, 5);
      ((Graphics2D)g).setPaint(getBorderColor());
      if (DarculaButtonUI.isHelpButton((JComponent)c)) {
        g.drawOval((w - diam) / 2, (h - diam) / 2, diam, diam);
      } else {
        g.translate(x,y);
        int r = JBUI.scale(square ? 3 : 5);
        g.drawRoundRect(offset, yOff, width - 2 * offset, height - 2 * yOff, r, r);
        g.translate(-x,-y);
      }

      config.restore();
    }
  }

  protected Color getBorderColor() {
    return Gray._100.withAlpha(180);
  }

  @Override
  public Insets getBorderInsets(Component c) {
    if (c.getParent() instanceof ActionToolbar) {
      return JBUI.insets(4, 16, 4, 16);
    }
    if (DarculaButtonUI.isSquare(c)) {
      return JBUI.insets(2, 0, 2, 0).asUIResource();
    }
    return JBUI.insets(8, 16, 8, 14).asUIResource();
  }

  protected int getOffset() {
    return myOffset;
  }

  @Override
  public boolean isBorderOpaque() {
    return false;
  }
}