Make the App Info Dialog appear modal

ui/app_list/views/app_list_view.cc

Index: ui/app_list/views/app_list_view.cc
diff --git a/ui/app_list/views/app_list_view.cc b/ui/app_list/views/app_list_view.cc
index a7f607da5e433d6c42f89ad864613cc947c1310c..0d74acf9ed8ed459f6e77c276c732a2cfbf6fbf4 100644
--- a/ui/app_list/views/app_list_view.cc
+++ b/ui/app_list/views/app_list_view.cc
@@ -28,6 +28,7 @@
 #include "ui/compositor/layer.h"
 #include "ui/compositor/layer_animation_observer.h"
 #include "ui/compositor/scoped_layer_animation_settings.h"
+#include "ui/gfx/canvas.h"
 #include "ui/gfx/image/image_skia.h"
 #include "ui/gfx/insets.h"
 #include "ui/gfx/path.h"
@@ -78,6 +79,26 @@ bool SupportsShadow() {
   return true;
 }
 
+// An background for a view that appears as a colored rounded rectangle with the
+// given radius and the same size as the target view.
+class ColoredRoundRectBackground : public views::Background {
+ public:
+  ColoredRoundRectBackground(int corner_radius, SkColor color)
+      : corner_radius_(corner_radius), color_(color) {};
+  virtual ~ColoredRoundRectBackground() {};
+
+  virtual void Paint(gfx::Canvas* canvas, views::View* view) const OVERRIDE {
+    SkPaint paint;
+    paint.setStyle(SkPaint::kFill_Style);
+    paint.setColor(color_);
+    canvas->DrawRoundRect(view->GetContentsBounds(), corner_radius_, paint);
+  }
+
+ private:
+  const int corner_radius_;
+  const SkColor color_;
+};
+
 }  // namespace
 
 // An animation observer to hide the view at the end of the animation.
@@ -127,6 +148,7 @@ AppListView::AppListView(AppListViewDelegate* delegate)
       app_list_main_view_(NULL),
       signin_view_(NULL),
       speech_view_(NULL),
+      overlay_view_(NULL),
       animation_observer_(new HideViewAnimationObserver()) {
   CHECK(delegate);
 
@@ -194,6 +216,11 @@ void AppListView::UpdateBounds() {
   SizeToContents();
 }
 
+void AppListView::ShowAppListOverlay(bool visible) {
+  DCHECK(overlay_view_);
+  overlay_view_->SetVisible(visible);
+}
+
 bool AppListView::ShouldCenterWindow() const {
   return delegate_->ShouldCenterWindow();
 }
@@ -334,6 +361,24 @@ void AppListView::InitAsBubbleInternal(gfx::NativeView parent,
   GetWidget()->Hide();
 #endif
 
+  // The contents corner radius is 1px smaller than border corner radius.

[calamity, 2014/05/20 08:42:06]

Mention that this is needed for platforms where the bubble doesn't have a
shadow. (Linux aura and Windows XP).

+  const int kOverlayCornerRadius =
+      GetBubbleFrameView()->bubble_border()->GetBorderCornerRadius() - 1;
+  const float kOverlayOpacity = 0.75f;
+
+  // To make the overlay view, construct a regular view with a solid white
+  // background, rather than a white rectangle on it. This is because we need
+  // overlay_view_ to be drawn to its own layer (so it appears correctly in the
+  // foreground).
+  overlay_view_ = new views::View();
+  overlay_view_->SetPaintToLayer(true);
+  overlay_view_->set_background(
+      new ColoredRoundRectBackground(kOverlayCornerRadius, SK_ColorWHITE));
+  overlay_view_->layer()->SetOpacity(kOverlayOpacity);
+  overlay_view_->SetBoundsRect(bounds());
+  overlay_view_->SetVisible(false);
+  AddChildView(overlay_view_);
+
   if (delegate_)
     delegate_->ViewInitialized();
 }