2 * Copyright (c) 2015 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.
19 * @file text-label-example.cpp
20 * @brief Basic usage of TextLabel control
24 #include <dali-toolkit/dali-toolkit.h>
28 #include "shared/multi-language-strings.h"
29 #include "shared/view.h"
32 using namespace Dali::Toolkit;
33 using namespace MultiLanguageStrings;
37 const char* const BACKGROUND_IMAGE = DEMO_IMAGE_DIR "grab-handle.png";
39 const unsigned int KEY_ZERO = 10;
40 const unsigned int KEY_ONE = 11;
41 const unsigned int KEY_F = 41;
42 const unsigned int KEY_H = 43;
43 const unsigned int KEY_V = 55;
44 const unsigned int KEY_M = 58;
45 const unsigned int KEY_L = 46;
46 const unsigned int KEY_S = 39;
47 const unsigned int KEY_PLUS = 21;
48 const unsigned int KEY_MINUS = 20;
50 const char* H_ALIGNMENT_STRING_TABLE[] =
57 const unsigned int H_ALIGNMENT_STRING_COUNT = sizeof( H_ALIGNMENT_STRING_TABLE ) / sizeof( H_ALIGNMENT_STRING_TABLE[0u] );
59 const char* V_ALIGNMENT_STRING_TABLE[] =
66 const unsigned int V_ALIGNMENT_STRING_COUNT = sizeof( V_ALIGNMENT_STRING_TABLE ) / sizeof( V_ALIGNMENT_STRING_TABLE[0u] );
68 int ConvertToEven(int value)
70 return (value % 2 == 0) ? value : (value + 1);
73 struct HSVColorConstraint
75 HSVColorConstraint(float hue, float saturation, float value)
77 saturation(saturation),
82 void operator()(Vector4& current, const PropertyInputContainer& inputs )
84 current = hsv2rgb(Vector4(inputs[0]->GetFloat(), saturation, value, current.a));
87 Vector4 hsv2rgb(Vector4 colorHSV)
89 float r=colorHSV.z*(1+colorHSV.y*(cos(colorHSV.x)-1));
90 float g=colorHSV.z*(1+colorHSV.y*(cos(colorHSV.x-2.09439)-1));
91 float b=colorHSV.z*(1+colorHSV.y*(cos(colorHSV.x+2.09439)-1));
92 return Vector4(r, g, b, colorHSV.a);
99 } // anonymous namespace
102 * @brief The main class of the demo.
104 class TextLabelExample : public ConnectionTracker
108 TextLabelExample( Application& application )
109 : mApplication( application ),
113 // Connect to the Application's Init signal
114 mApplication.InitSignal().Connect( this, &TextLabelExample::Create );
119 // Nothing to do here.
123 * One-time setup in response to Application InitSignal.
125 void Create( Application& application )
127 Stage stage = Stage::GetCurrent();
129 stage.KeyEventSignal().Connect(this, &TextLabelExample::OnKeyEvent);
130 Vector2 stageSize = stage.GetSize();
132 mContainer = Control::New();
133 mContainer.SetName( "Container" );
134 mContainer.SetParentOrigin( ParentOrigin::CENTER );
135 mLayoutSize = Vector2(stageSize.width*0.6f, stageSize.width*0.6f);
136 mContainer.SetSize( mLayoutSize );
137 mContainer.SetDrawMode( DrawMode::OVERLAY_2D );
138 stage.Add( mContainer );
140 // Resize the center layout when the corner is grabbed
141 mGrabCorner = ImageView::New( BACKGROUND_IMAGE );
142 mGrabCorner.SetName( "GrabCorner" );
143 mGrabCorner.SetAnchorPoint( AnchorPoint::TOP_CENTER );
144 mGrabCorner.SetParentOrigin( ParentOrigin::BOTTOM_RIGHT );
145 mGrabCorner.SetResizePolicy( ResizePolicy::USE_NATURAL_SIZE, Dimension::ALL_DIMENSIONS );
146 mContainer.Add( mGrabCorner );
148 mPanGestureDetector = PanGestureDetector::New();
149 mPanGestureDetector.Attach( mGrabCorner );
150 mPanGestureDetector.DetectedSignal().Connect( this, &TextLabelExample::OnPan );
152 mLabel = TextLabel::New( "A Quick Brown Fox Jumps Over The Lazy Dog" );
153 mLabel.SetName( "TextLabel" );
154 mLabel.SetAnchorPoint( AnchorPoint::TOP_LEFT );
155 mLabel.SetResizePolicy( ResizePolicy::FILL_TO_PARENT, Dimension::WIDTH );
156 mLabel.SetResizePolicy( ResizePolicy::FILL_TO_PARENT, Dimension::HEIGHT );
157 mLabel.SetProperty( TextLabel::Property::MULTI_LINE, true );
158 mLabel.SetProperty( TextLabel::Property::TEXT_COLOR, Color::BLUE );
159 mLabel.SetProperty( TextLabel::Property::SHADOW_OFFSET, Vector2( 1.0f, 1.0f ) );
160 mLabel.SetProperty( TextLabel::Property::SHADOW_COLOR, Color::BLACK );
161 mLabel.SetBackgroundColor( Color::WHITE );
162 mContainer.Add( mLabel );
164 mHueAngleIndex = mLabel.RegisterProperty( "hue", 0.0f );
165 Renderer bgRenderer = mLabel.GetRendererAt(0);
166 mOverrideMixColorIndex = bgRenderer.GetPropertyIndex( ColorVisual::Property::MIX_COLOR );
168 Constraint constraint = Constraint::New<Vector4>( bgRenderer, mOverrideMixColorIndex, HSVColorConstraint(0.0f, 0.5f, 0.8f));
169 constraint.AddSource( Source( mLabel, mHueAngleIndex ) );
170 constraint.SetRemoveAction( Constraint::Discard );
173 Animation anim = Animation::New(50.0f);
174 anim.AnimateTo(Property(mLabel, mHueAngleIndex), 6.28318f);
175 anim.SetLooping(true);
178 Property::Value labelText = mLabel.GetProperty( TextLabel::Property::TEXT );
179 std::cout << "Displaying text: \"" << labelText.Get< std::string >() << "\"" << std::endl;
182 // Resize the text-label with pan gesture
183 void OnPan( Actor actor, const PanGesture& gesture )
185 // Reset mLayoutSize when the pan starts
186 if( gesture.state == Gesture::Started )
188 if( mLayoutSize.x < 2.0f )
190 mLayoutSize.x = 2.0f;
193 if( mLayoutSize.y < 2.0f )
195 mLayoutSize.y = 2.0f;
199 mLayoutSize.x += gesture.displacement.x * 2.0f;
200 mLayoutSize.y += gesture.displacement.y * 2.0f;
202 if( mLayoutSize.x >= 2.0f ||
203 mLayoutSize.y >= 2.0f )
205 // Avoid pixel mis-alignment issue
206 Vector2 clampedSize = Vector2( std::max( ConvertToEven( static_cast<int>( mLayoutSize.x )), 2 ),
207 std::max( ConvertToEven( static_cast<int>( mLayoutSize.y )), 2 ) );
209 mContainer.SetSize( clampedSize );
214 * Main key event handler
216 void OnKeyEvent(const KeyEvent& event)
218 if(event.state == KeyEvent::Down)
220 if( IsKey( event, DALI_KEY_ESCAPE) || IsKey( event, DALI_KEY_BACK ) )
224 else if( event.IsCtrlModifier() )
226 switch( event.keyCode )
228 // Select rendering back-end
229 case KEY_ZERO: // fall through
232 mLabel.SetProperty( TextLabel::Property::RENDERING_BACKEND, event.keyCode - 10 );
235 case KEY_F: // Fill vertically
237 if( ResizePolicy::DIMENSION_DEPENDENCY == mLabel.GetResizePolicy(Dimension::HEIGHT) )
239 mLabel.SetResizePolicy( ResizePolicy::FILL_TO_PARENT, Dimension::HEIGHT );
243 mLabel.SetResizePolicy( ResizePolicy::DIMENSION_DEPENDENCY, Dimension::HEIGHT );
247 case KEY_H: // Horizontal alignment
249 if( ++mAlignment >= H_ALIGNMENT_STRING_COUNT )
254 mLabel.SetProperty( TextLabel::Property::HORIZONTAL_ALIGNMENT, H_ALIGNMENT_STRING_TABLE[ mAlignment ] );
257 case KEY_V: // Vertical alignment
259 if( ++mAlignment >= V_ALIGNMENT_STRING_COUNT )
264 mLabel.SetProperty( TextLabel::Property::VERTICAL_ALIGNMENT, V_ALIGNMENT_STRING_TABLE[ mAlignment ] );
267 case KEY_M: // Multi-line
269 bool multiLine = mLabel.GetProperty<bool>( TextLabel::Property::MULTI_LINE );
270 mLabel.SetProperty( TextLabel::Property::MULTI_LINE, !multiLine );
273 case KEY_L: // Language
275 const Language& language = LANGUAGES[ mLanguageId ];
277 mLabel.SetProperty( TextLabel::Property::TEXT, language.text );
279 if( ++mLanguageId >= NUMBER_OF_LANGUAGES )
285 case KEY_S: // Shadow color
287 if( Color::BLACK == mLabel.GetProperty<Vector4>( TextLabel::Property::SHADOW_COLOR ) )
289 mLabel.SetProperty( TextLabel::Property::SHADOW_COLOR, Color::RED );
293 mLabel.SetProperty( TextLabel::Property::SHADOW_COLOR, Color::BLACK );
297 case KEY_PLUS: // Increase shadow offset
299 mLabel.SetProperty( TextLabel::Property::SHADOW_OFFSET, mLabel.GetProperty<Vector2>( TextLabel::Property::SHADOW_OFFSET ) + Vector2( 1.0f, 1.0f ) );
302 case KEY_MINUS: // Decrease shadow offset
304 mLabel.SetProperty( TextLabel::Property::SHADOW_OFFSET, mLabel.GetProperty<Vector2>( TextLabel::Property::SHADOW_OFFSET ) - Vector2( 1.0f, 1.0f ) );
315 Application& mApplication;
322 PanGestureDetector mPanGestureDetector;
326 unsigned int mLanguageId;
327 unsigned int mAlignment;
328 Property::Index mHueAngleIndex;
329 Property::Index mOverrideMixColorIndex;
332 void RunTest( Application& application )
334 TextLabelExample test( application );
336 application.MainLoop();
339 /** Entry point for Linux & Tizen applications */
340 int DALI_EXPORT_API main( int argc, char **argv )
342 Application application = Application::New( &argc, &argv, DEMO_THEME_PATH );
344 RunTest( application );