From db66426e52f1df3604cb43b28d6b5c5ebabe6e4a Mon Sep 17 00:00:00 2001
From: Konstantin Bulenkov <kb@jetbrains.com>
Date: Mon, 21 Apr 2014 17:00:46 +0200
Subject: [PATCH] initial

---
 .../src/com/intellij/ui/TransparentPanel.java | 57 +++++++++++++++++++
 1 file changed, 57 insertions(+)
 create mode 100644 platform/util/src/com/intellij/ui/TransparentPanel.java

diff --git a/platform/util/src/com/intellij/ui/TransparentPanel.java b/platform/util/src/com/intellij/ui/TransparentPanel.java
new file mode 100644
index 000000000000..a663e1b5600c
--- /dev/null
+++ b/platform/util/src/com/intellij/ui/TransparentPanel.java
@@ -0,0 +1,57 @@
+/*
+ * Copyright 2000-2014 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.ui;
+
+import javax.swing.*;
+import java.awt.*;
+
+/**
+ * @author Konstantin Bulenkov
+ */
+@SuppressWarnings("UnusedDeclaration")
+public class TransparentPanel extends JPanel {
+  private float myOpacity;
+
+  public TransparentPanel(float opacity, LayoutManager layout) {
+    super(layout);
+    if (opacity > 1.0 || opacity < 0.0) {
+      throw new IllegalArgumentException("Opacity should be in range [0.0 .. 1.0]");
+    }
+    myOpacity = opacity;
+  }
+
+  public TransparentPanel(float opacity) {
+    myOpacity = opacity;
+  }
+
+  public TransparentPanel() {
+    myOpacity = 0.7f;
+  }
+
+  public float getOpacity() {
+    return myOpacity;
+  }
+
+  public void setOpacity(float opacity) {
+    myOpacity = opacity;
+  }
+
+  @Override
+  public void paint(Graphics g) {
+    ((Graphics2D)g).setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_OVER, myOpacity));
+    super.paint(g);
+  }
+}