1 // Copyright 2013 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #include "ui/app_list/views/cached_label.h" 6 7 #include "base/strings/utf_string_conversions.h" 8 #include "ui/base/resource/resource_bundle.h" 9 #include "ui/gfx/canvas.h" 10 11 namespace app_list { 12 CachedLabel()13CachedLabel::CachedLabel() 14 : needs_repaint_(true) { 15 } 16 PaintToBackingImage()17void CachedLabel::PaintToBackingImage() { 18 if (image_.size() == size() && !needs_repaint_) 19 return; 20 21 bool is_opaque = SkColorGetA(background_color()) == 0xFF; 22 gfx::Canvas canvas(size(), 1.0f, is_opaque); 23 // If a background is provided, it will initialize the canvas in 24 // View::OnPaintBackground(). Otherwise, the background must be set here. 25 if (!background()) { 26 canvas.FillRect( 27 GetLocalBounds(), background_color(), SkXfermode::kSrc_Mode); 28 } 29 Label::OnPaint(&canvas); 30 image_ = gfx::ImageSkia(canvas.ExtractImageRep()); 31 needs_repaint_ = false; 32 } 33 34 #if defined(OS_WIN) OnPaint(gfx::Canvas * canvas)35void CachedLabel::OnPaint(gfx::Canvas* canvas) { 36 PaintToBackingImage(); 37 canvas->DrawImageInt(image_, 0, 0); 38 } 39 #endif 40 41 } // namespace app_list 42