Move chrome/browser/gtk to chrome/browser/ui/gtk

chrome/browser/ui/gtk/nine_box.h

+// Copyright (c) 2010 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef CHROME_BROWSER_UI_GTK_NINE_BOX_H_
+#define CHROME_BROWSER_UI_GTK_NINE_BOX_H_
+#pragma once
+
+#include <gtk/gtk.h>
+
+// A NineBox manages a set of source images representing a 3x3 grid, where
+// non-corner images can be tiled to make a larger image.  It's used to
+// use bitmaps for constructing image-based resizable widgets like buttons.
+//
+// If you want just a vertical image that stretches in height but is fixed
+// in width, only pass in images for the left column (leave others NULL).
+// Similarly, for a horizontal image that stretches in width but is fixed in
+// height, only pass in images for the top row.
+//
+// TODO(port): add support for caching server-side pixmaps of prerendered
+// nineboxes.
+class NineBox {
+ public:
+  // Construct a NineBox with nine images.  Images are specified using resource
+  // ids that will be passed to the resource bundle.  Use 0 for no image.
+  NineBox(int top_left, int top, int top_right, int left, int center, int right,
+          int bottom_left, int bottom, int bottom_right);
+
+  // Construct a NineBox from a single image and insets indicating the sizes
+  // of the edges and corners.
+  NineBox(int image, int top_margin, int bottom_margin, int left_margin,
+          int right_margin);
+  ~NineBox();
+
+  // Render the NineBox to |dst|.
+  // The images will be tiled to fit into the widget.
+  void RenderToWidget(GtkWidget* dst) const;
+
+  // As above, but rendered partially transparent.
+  void RenderToWidgetWithOpacity(GtkWidget* dst, double opacity) const;
+
+  // Render the top row of images to |dst| between |x1| and |x1| + |width|.
+  // This is split from RenderToWidget so the toolbar can use it.
+  void RenderTopCenterStrip(cairo_t* cr, int x, int y, int width) const;
+
+  // Change all pixels that are white in |images_| to have 0 opacity.
+  void ChangeWhiteToTransparent();
+
+  // Set the shape of |widget| to match that of the ninebox. Note that |widget|
+  // must have its own window and be allocated. Also, currently only the top
+  // three images are used.
+  // TODO(estade): extend this function to use all 9 images (if it's ever
+  // needed).
+  void ContourWidget(GtkWidget* widget) const;
+
+ private:
+  GdkPixbuf* images_[9];
+  bool unref_pixbufs_on_destroy_;
+};
+
+#endif  // CHROME_BROWSER_UI_GTK_NINE_BOX_H_