Add transparency to TYPE_CHILD WidgetGtk.

 * This does not work with renderer as parent yet.(I need to investigate renderer what it's doing)
 * gtk_widget_set_back_pixmap is not necessary and removed.
 * changed to use clear operation to fill a background with transparent color.

BUG=none
TEST=manual: added transparent widget example to view_examples. I also tested with chrome and confirmed that info bubble, app launcher and tab dragging works.

Committed: http://src.chromium.org/viewvc/chrome?view=rev&revision=46374

Review URL: http://codereview.chromium.org/1629024

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@46439 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 29 insertions, 9 deletions

diff --git a/views/examples/widget_example.h b/views/examples/widget_example.h
index 609e6ed..b84e8f8 100644
--- a/views/examples/widget_example.h
+++ b/views/examples/widget_example.h
@@ -43,7 +43,17 @@ class BoxLayout : public views::LayoutManager {
   }
 
   virtual gfx::Size GetPreferredSize(views::View* host) {
-    return host->GetPreferredSize();
+    int count = host->GetChildViewCount();
+    gfx::Rect bounds;
+    int y = 0;
+    for (int i = 0; i < count; i++) {
+      views::View* child = host->GetChildViewAt(i);
+      gfx::Size size = child->GetPreferredSize();
+      gfx::Rect child_bounds(0, y, size.width(), size.height());
+      bounds = bounds.Union(child_bounds);
+      y += size.height();
+    }
+    return bounds.size();
   }
 
  private:
@@ -123,19 +133,29 @@ class WidgetExample : public ExampleBase, public views::ButtonListener {
 
   void InitWidget(Widget* widget,
                   const Widget::TransparencyParam transparency) {
-    // Add a button to close the popup widget.
+    // Add view/native buttons to close the popup widget.
     views::TextButton* close_button = new views::TextButton(this, L"Close");
     close_button->set_tag(CLOSE_WIDGET);
+    // TODO(oshima): support transparent native view.
+    views::NativeButton* native_button
+        = new views::NativeButton(this, L"Native Close");
+    native_button->set_tag(CLOSE_WIDGET);
+
+    views::View* button_container = new views::View();
+    button_container->SetLayoutManager(new BoxLayout);
+    button_container->AddChildView(close_button);
+    button_container->AddChildView(native_button);
+
     views::View* widget_container = new views::View();
     widget_container->SetLayoutManager(new CenterLayout);
-    if (transparency == Widget::Transparent)
-      close_button->set_background(
-          views::Background::CreateStandardPanelBackground());
-    else
+    widget_container->AddChildView(button_container);
+
+    widget->SetContentsView(widget_container);
+
+    if (transparency != Widget::Transparent) {
       widget_container->set_background(
           views::Background::CreateStandardPanelBackground());
-    widget_container->AddChildView(close_button);
-    widget->GetRootView()->SetContentsView(widget_container);
+    }
 
     // Show the widget.
     widget->Show();
@@ -151,7 +171,7 @@ class WidgetExample : public ExampleBase, public views::ButtonListener {
     // Compute where to place the child widget.
     // We'll place it at the center of the root widget.
     views::WidgetGtk* parent_widget =
-        static_cast<views::WidgetGtk*>(parent->GetWidget()->GetRootWidget());
+        static_cast<views::WidgetGtk*>(parent->GetWidget());
     gfx::Rect bounds;
     parent_widget->GetBounds(&bounds, false);
     // Child widget is 200x200 square.