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| 1 // Copyright (c) 2011 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 "views/examples/example_base.h" | |
| 6 | |
| 7 #include <stdarg.h> | |
| 8 | |
| 9 #include "base/compiler_specific.h" | |
| 10 #include "base/stringprintf.h" | |
| 11 #include "views/examples/examples_main.h" | |
| 12 | |
| 13 namespace { | |
| 14 | |
| 15 // Some of GTK based view classes require NativeWidgetGtk in the view | |
| 16 // parent chain. This class is used to defer the creation of such | |
| 17 // views until a NativeWidgetGtk is added to the view hierarchy. | |
| 18 class ContainerView : public views::View { | |
| 19 public: | |
| 20 explicit ContainerView(examples::ExampleBase* base) | |
| 21 : example_view_created_(false), | |
| 22 example_base_(base) { | |
| 23 } | |
| 24 | |
| 25 private: | |
| 26 // Overridden from views::View: | |
| 27 virtual void ViewHierarchyChanged(bool is_add, | |
| 28 views::View* parent, | |
| 29 views::View* child) OVERRIDE { | |
| 30 views::View::ViewHierarchyChanged(is_add, parent, child); | |
| 31 // We're not using child == this because a Widget may not be | |
| 32 // availalbe when this is added to the hierarchy. | |
| 33 if (is_add && GetWidget() && !example_view_created_) { | |
| 34 example_view_created_ = true; | |
| 35 example_base_->CreateExampleView(this); | |
| 36 } | |
| 37 } | |
| 38 | |
| 39 // True if the example view has already been created, or false otherwise. | |
| 40 bool example_view_created_; | |
| 41 | |
| 42 examples::ExampleBase* example_base_; | |
| 43 | |
| 44 DISALLOW_COPY_AND_ASSIGN(ContainerView); | |
| 45 }; | |
| 46 | |
| 47 } // namespace | |
| 48 | |
| 49 namespace examples { | |
| 50 | |
| 51 ExampleBase::~ExampleBase() {} | |
| 52 | |
| 53 ExampleBase::ExampleBase(ExamplesMain* main, const char* title) | |
| 54 : main_(main), example_title_(title) { | |
| 55 container_ = new ContainerView(this); | |
| 56 } | |
| 57 | |
| 58 // Prints a message in the status area, at the bottom of the window. | |
| 59 void ExampleBase::PrintStatus(const char* format, ...) { | |
| 60 va_list ap; | |
| 61 va_start(ap, format); | |
| 62 std::string msg; | |
| 63 base::StringAppendV(&msg, format, ap); | |
| 64 main_->SetStatus(msg); | |
| 65 } | |
| 66 | |
| 67 } // namespace examples | |
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