+/*
+ * Copyright (c) 2017 Samsung Electronics Co., Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+
+#include <dali/devel-api/actors/actor-devel.h>
+#include <dali-toolkit/dali-toolkit.h>
+#include <dali-toolkit/devel-api/controls/text-controls/text-label-devel.h>
+
+using namespace Dali;
+using namespace Dali::Toolkit;
+
+namespace
+{
+const float COLOR_ANIMATION_DURATION( 5.0f );
+const float OPACITY_ANIMATION_DURATION( 1.0f );
+} // unnamed namespace
+
+/**
+ * @brief An example that shows how to use property notifications.
+ *
+ * - Creates a text label and sets its text color to black.
+ * - Animates the text color of a text label to red.
+ * - Sets up a property notification so that we are informed when the color is 50% red.
+ * - When we are notified, we start a new animation which animates the text label to transparent.
+ */
+class PropertyNotificationController : public ConnectionTracker
+{
+public:
+
+ /**
+ * @brief Constructor.
+ * @param[in] application A reference to the Application class.
+ */
+ PropertyNotificationController( Application& application )
+ : mApplication( application )
+ {
+ // Connect to the Application's Init signal
+ mApplication.InitSignal().Connect( this, &PropertyNotificationController::Create );
+ }
+
+ /**
+ * @brief Called to initialise the application content
+ * @param[in] application A reference to the Application class.
+ */
+ void Create( Application& application )
+ {
+ // Set the stage background color and connect to the stage's key signal to allow Back and Escape to exit.
+ Stage stage = Stage::GetCurrent();
+ stage.SetBackgroundColor( Color::WHITE );
+ stage.KeyEventSignal().Connect( this, &PropertyNotificationController::OnKeyEvent );
+
+ // Create a text label and set the text color to black
+ mTextLabel = TextLabel::New( "Black to Red Animation\nNew opacity animation at 50% Red" );
+ mTextLabel.SetProperty( Actor::Property::ANCHOR_POINT, AnchorPoint::CENTER );
+ mTextLabel.SetProperty( Actor::Property::PARENT_ORIGIN, ParentOrigin::CENTER );
+ mTextLabel.SetProperty( TextLabel::Property::MULTI_LINE, true );
+ mTextLabel.SetProperty( TextLabel::Property::HORIZONTAL_ALIGNMENT, "CENTER" );
+ mTextLabel.SetProperty( DevelTextLabel::Property::TEXT_COLOR_ANIMATABLE, Color::BLACK );
+ stage.Add( mTextLabel );
+
+ // Create an animation and animate the text color to red
+ Animation animation = Animation::New( COLOR_ANIMATION_DURATION );
+ animation.AnimateTo( Property( mTextLabel, DevelTextLabel::Property::TEXT_COLOR_ANIMATABLE ), Color::RED );
+ animation.Play();
+
+ // Set up a property notification so we are notified when the red component of the text-color reaches 50%
+ PropertyNotification notification = mTextLabel.AddPropertyNotification( DevelTextLabel::Property::TEXT_COLOR_RED, GreaterThanCondition( 0.5f ) );
+ notification.NotifySignal().Connect( this, &PropertyNotificationController::RedComponentNotification );
+ }
+
+ /**
+ * @brief Called when any key event is received
+ *
+ * Will use this to quit the application if Back or the Escape key is received
+ * @param[in] event The key event information
+ */
+ void OnKeyEvent( const KeyEvent& event )
+ {
+ if( event.state == KeyEvent::Down )
+ {
+ if ( IsKey( event, Dali::DALI_KEY_ESCAPE ) || IsKey( event, Dali::DALI_KEY_BACK ) )
+ {
+ mApplication.Quit();
+ }
+ }
+ }
+
+ /**
+ * @brief Called when the property notification condition is met.
+ *
+ * In our case, it's when the red component is greater than 50%.
+ * Will use this notification to animate the opacity of the text-label to transparent.
+ */
+ void RedComponentNotification( PropertyNotification& /* source */ )
+ {
+ Animation animation = Animation::New( OPACITY_ANIMATION_DURATION );
+ animation.AnimateTo( Property( mTextLabel, DevelActor::Property::OPACITY ), 0.0f );
+ animation.Play();
+ }
+
+private:
+ Application& mApplication;
+ TextLabel mTextLabel;
+};
+
+int DALI_EXPORT_API main( int argc, char **argv )
+{
+ Application application = Application::New( &argc, &argv );
+ PropertyNotificationController test( application );
+ application.MainLoop();
+ return 0;
+}
projects / platform / core / uifw / dali-demo.git / commitdiff