2 * Copyright (c) 2017 Samsung Electronics Co., Ltd.
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
18 #include <dali/dali.h>
19 #include <dali-toolkit/dali-toolkit.h>
22 using namespace Toolkit;
30 const char* VERTEX_SHADER = DALI_COMPOSE_SHADER(
31 attribute mediump vec2 aPosition;\n // DALi shader builtin
32 uniform mediump mat4 uMvpMatrix;\n // DALi shader builtin
33 uniform mediump vec3 uSize;\n // DALi shader builtin
37 mediump vec4 vertexPosition = vec4(aPosition, 0.0, 1.0);\n
38 vertexPosition.xyz *= uSize;\n
39 gl_Position = uMvpMatrix * vertexPosition;\n
46 const char* FRAGMENT_SHADER = DALI_COMPOSE_SHADER(
47 uniform mediump vec4 uColor;\n
51 gl_FragColor = uColor;\n
57 // This example shows how to draw a line in actor's color
59 class DrawLineController : public ConnectionTracker
63 DrawLineController( Application& application )
64 : mApplication( application )
66 // Connect to the Application's Init signal
67 mApplication.InitSignal().Connect( this, &DrawLineController::Create );
72 // Nothing to do here;
75 // The Init signal is received once (only) during the Application lifetime
76 void Create( Application& application )
78 // Get a handle to the stage
79 Stage stage = Stage::GetCurrent();
80 stage.SetBackgroundColor( Color::WHITE );
82 // Step 1. Create shader
85 // Step 2. Prepare geometry
88 // Step 3. Create a renderer
91 // Step 4. Create an Actor
94 // Respond to a click anywhere on the stage
95 stage.GetRootLayer().TouchSignal().Connect( this, &DrawLineController::OnTouch );
97 // Respond to key events
98 stage.KeyEventSignal().Connect( this, &DrawLineController::OnKeyEvent );
101 bool OnTouch( Actor actor, const TouchData& touch )
103 // quit the application
109 * @brief Called when any key event is received
111 * Will use this to quit the application if Back or the Escape key is received
112 * @param[in] event The key event information
114 void OnKeyEvent( const KeyEvent& event )
116 if( event.state == KeyEvent::Down )
118 if ( IsKey( event, Dali::DALI_KEY_ESCAPE ) || IsKey( event, Dali::DALI_KEY_BACK ) )
126 * This function creates a line geometry made of two vertices in order
127 * to draw a diagonal line.
129 void CreateLineGeometry()
131 Vector2 vertices[] = {
132 Vector2( -1.0f, -1.0f ),
133 Vector2( 1.0f, 1.0f )
136 PropertyBuffer vertexBuffer = PropertyBuffer::New( Property::Map()
137 .Add( "aPosition", Property::VECTOR2 ) );
138 vertexBuffer.SetData( vertices, sizeof(vertices) / sizeof(Vector2) );
140 mGeometry = Geometry::New();
141 mGeometry.AddVertexBuffer( vertexBuffer );
142 mGeometry.SetType( Geometry::LINES );
146 * Creates a shader using inlined variable VERTEX_SHADER and FRAGMENT_SHADER
148 * Shaders are very basic and all they do is transforming vertices and applying actor's colour.
150 void CreateLineShader()
152 mShader = Shader::New( VERTEX_SHADER, FRAGMENT_SHADER );
156 * Function creates renderer.
158 void CreateRenderer()
160 mRenderer = Renderer::New( mGeometry, mShader );
164 * Creates new actor and attaches renderer.
168 Stage stage = Stage::GetCurrent();
169 Size size = stage.GetSize() * 0.25f;
170 mActor = Actor::New();
171 mActor.SetAnchorPoint( AnchorPoint::CENTER );
172 mActor.SetParentOrigin( ParentOrigin::CENTER );
173 mActor.SetPosition( Vector3( 0.0f, 0.0f, 0.0f ) );
174 mActor.SetColor( Color::BLACK );
175 mActor.SetSize( Vector3( size.x, size.x, size.x ) );
176 mActor.AddRenderer( mRenderer );
181 Application& mApplication;
189 int DALI_EXPORT_API main( int argc, char **argv )
191 Application application = Application::New( &argc, &argv );
192 DrawLineController test( application );
193 application.MainLoop();