1 // Copyright (c) 2012 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/views/examples/example_base.h" 6 7 #include <stdarg.h> 8 9 #include "base/strings/stringprintf.h" 10 #include "ui/views/view.h" 11 12 namespace views { 13 namespace examples { 14 15 // Logs the specified string to the status area of the examples window. 16 // This function can only be called if there is a visible examples window. 17 void LogStatus(const std::string& status); 18 19 namespace { 20 21 // TODO(oshima): Check if this special container is still necessary. 22 class ContainerView : public View { 23 public: 24 explicit ContainerView(ExampleBase* base) 25 : example_view_created_(false), 26 example_base_(base) { 27 } 28 29 private: 30 // View: 31 virtual void ViewHierarchyChanged( 32 const ViewHierarchyChangedDetails& details) OVERRIDE { 33 View::ViewHierarchyChanged(details); 34 // We're not using child == this because a Widget may not be 35 // available when this is added to the hierarchy. 36 if (details.is_add && GetWidget() && !example_view_created_) { 37 example_view_created_ = true; 38 example_base_->CreateExampleView(this); 39 } 40 } 41 42 // True if the example view has already been created, or false otherwise. 43 bool example_view_created_; 44 45 ExampleBase* example_base_; 46 47 DISALLOW_COPY_AND_ASSIGN(ContainerView); 48 }; 49 50 } // namespace 51 52 ExampleBase::~ExampleBase() {} 53 54 ExampleBase::ExampleBase(const char* title) : 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 LogStatus(msg); 65 } 66 67 } // namespace examples 68 } // namespace views 69
