examples/text-overlap/text-overlap-example.cpp

   1
   2 #include <dali-toolkit/dali-toolkit.h>
   3 #include <dali/devel-api/actors/actor-devel.h>
   4 #include "text-overlap-example.h"
   5
   6 #include <iostream>
   7
   8 using namespace Dali;
   9 using namespace Dali::Toolkit;
  10
  11 static const int NUMBER_OF_LABELS(2);
  12
  13
  14
  15 namespace Demo
  16 {
  17
  18 TextOverlapController::TextOverlapController( Application& app )
  19 : mApplication( app ),
  20   mTopmostLabel( 1 )
  21 {
  22   app.InitSignal().Connect( this, &TextOverlapController::Create );
  23   app.TerminateSignal().Connect( this, &TextOverlapController::Destroy );
  24 }
  25
  26 void TextOverlapController::Create( Application& app )
  27 {
  28   Window window = app.GetWindow();
  29   window.KeyEventSignal().Connect( this, &TextOverlapController::OnKeyEvent );
  30
  31   Vector2 windowSize = window.GetSize();
  32
  33   mLabels[0] = TextLabel::New("Text Label 1");
  34   mLabels[1] = TextLabel::New("Text Label 2");
  35
  36   mLabels[0].SetProperty( Dali::Actor::Property::NAME,"Label1");
  37   mLabels[1].SetProperty( Dali::Actor::Property::NAME,"Label2");
  38
  39   mLabels[0].SetProperty( Dali::DevelActor::Property::SIBLING_ORDER, 1 );
  40   mLabels[1].SetProperty( Dali::DevelActor::Property::SIBLING_ORDER, 2 );
  41
  42   mLabels[0].SetProperty( Control::Property::BACKGROUND, Color::RED );
  43   mLabels[1].SetProperty( Control::Property::BACKGROUND, Color::YELLOW );
  44
  45   for(int i=0; i<NUMBER_OF_LABELS; ++i )
  46   {
  47     mLabels[i].SetProperty( TextLabel::Property::HORIZONTAL_ALIGNMENT, "CENTER" );
  48     mLabels[i].SetProperty( Actor::Property::ANCHOR_POINT, AnchorPoint::TOP_LEFT );
  49     mLabels[i].SetProperty( Actor::Property::PARENT_ORIGIN, ParentOrigin::TOP_LEFT );
  50     mLabels[i].SetProperty( Actor::Property::POSITION, Vector2( 0, (i*2+1) * windowSize.height * 0.25f ));
  51   }
  52
  53   window.Add( mLabels[0] );
  54   window.Add( mLabels[1] );
  55
  56   mSwapButton = PushButton::New();
  57   mSwapButton.SetProperty( Button::Property::LABEL, "Swap depth order");
  58   mSwapButton.SetProperty( Actor::Property::PARENT_ORIGIN, ParentOrigin::BOTTOM_CENTER );
  59   mSwapButton.SetProperty( Actor::Property::ANCHOR_POINT, AnchorPoint::BOTTOM_CENTER );
  60   mSwapButton.ClickedSignal().Connect( this, &TextOverlapController::OnClicked );
  61   mSwapButton.SetResizePolicy( ResizePolicy::FILL_TO_PARENT, Dimension::WIDTH );
  62   mSwapButton.SetResizePolicy( ResizePolicy::USE_NATURAL_SIZE, Dimension::HEIGHT );
  63   window.Add( mSwapButton );
  64
  65
  66   Layer rootLayer = window.GetRootLayer();
  67   rootLayer.SetProperty( Dali::Actor::Property::NAME,"RootLayer");
  68
  69   mPanDetector = PanGestureDetector::New();
  70   mPanDetector.Attach( rootLayer );
  71   mPanDetector.AddAngle( Radian(-0.5f * Math::PI ));
  72   mPanDetector.AddAngle( Radian( 0.5f * Math::PI ));
  73   mPanDetector.DetectedSignal().Connect( this, &TextOverlapController::OnPan );
  74 }
  75
  76 void TextOverlapController::OnPan( Actor actor, const PanGesture& gesture )
  77 {
  78   const Gesture::State state = gesture.GetState();
  79   if( ! mGrabbedActor || state == PanGesture::Started )
  80   {
  81     const Vector2& gesturePosition = gesture.GetPosition();
  82     for( int i=0; i<NUMBER_OF_LABELS; ++i )
  83     {
  84       Vector3 position = mLabels[i].GetCurrentProperty< Vector3 >( Actor::Property::POSITION );
  85       Vector3 size = mLabels[i].GetCurrentProperty< Vector3 >( Actor::Property::SIZE );
  86       if( gesturePosition.y > position.y - size.y * 0.5f &&
  87           gesturePosition.y <= position.y + size.y * 0.5f )
  88       {
  89         mGrabbedActor = mLabels[i];
  90         break;
  91       }
  92     }
  93   }
  94   else if( mGrabbedActor && state == PanGesture::Continuing )
  95   {
  96     Vector2 windowSize = mApplication.GetWindow().GetSize();
  97     Vector3 size = mGrabbedActor.GetCurrentProperty< Vector3 >( Actor::Property::SIZE );
  98     const Vector2& gesturePosition = gesture.GetPosition();
  99
 100     float y = Clamp( gesturePosition.y, size.y * 0.5f, windowSize.y - size.y*0.5f );
 101     mGrabbedActor.SetProperty( Actor::Property::POSITION, Vector2( 0, y ));
 102   }
 103   else
 104   {
 105     mGrabbedActor.Reset();
 106   }
 107 }
 108
 109 void TextOverlapController::Destroy( Application& app )
 110 {
 111   mPanDetector.DetachAll();
 112   UnparentAndReset(mLabels[0]);
 113   UnparentAndReset(mLabels[1]);
 114   mGrabbedActor.Reset();
 115 }
 116
 117 bool TextOverlapController::OnClicked( Button button )
 118 {
 119   mTopmostLabel = 1-mTopmostLabel; // toggles between 0 and 1
 120   mLabels[mTopmostLabel].RaiseToTop();
 121   return false;
 122 }
 123
 124
 125 void TextOverlapController::OnKeyEvent( const KeyEvent& keyEvent )
 126 {
 127   if( keyEvent.GetState() == KeyEvent::DOWN &&
 128       ( IsKey( keyEvent, DALI_KEY_BACK ) ||
 129         IsKey( keyEvent, DALI_KEY_ESCAPE ) ) )
 130   {
 131     mApplication.Quit();
 132   }
 133   else
 134   {
 135     Dali::Layer l = mApplication.GetWindow().GetRootLayer();
 136     int so = l.GetProperty<int>(Dali::DevelActor::Property::SIBLING_ORDER);
 137     l.SetProperty(Dali::DevelActor::Property::SIBLING_ORDER, so+1);
 138   }
 139 }
 140
 141
 142 } // namespace Demo
 143
 144 int DALI_EXPORT_API main( int argc, char** argv )
 145 {
 146   {
 147     Application app = Application::New( &argc, &argv );
 148     Demo::TextOverlapController controller( app );
 149     app.MainLoop();
 150   }
 151   exit( 0 );
 152 }