examples/layouting/linear-example.cpp

   1 /*
   2  * Copyright (c) 2018 Samsung Electronics Co., Ltd.
   3  *
   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
   7  *
   8  * http://www.apache.org/licenses/LICENSE-2.0
   9  *
  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.
  15  *
  16  */
  17
  18 #include <string>
  19 #include "linear-example.h"
  20 #include <dali-toolkit/devel-api/visuals/image-visual-properties-devel.h>
  21 #include <dali-toolkit/devel-api/visual-factory/visual-factory.h>
  22 #include <dali-toolkit/devel-api/controls/control-devel.h>
  23 #include <dali-toolkit/devel-api/layouting/linear-layout.h>
  24
  25 using namespace Dali;
  26 using namespace Dali::Toolkit;
  27
  28 namespace
  29 {
  30
  31 // Button file names
  32 const char* LTR_IMAGE( DEMO_IMAGE_DIR "icon-play.png" );
  33 const char* LTR_SELECTED_IMAGE( DEMO_IMAGE_DIR "icon-play-selected.png" );
  34
  35 const char* RTL_IMAGE( DEMO_IMAGE_DIR "icon-reverse.png" );
  36 const char* RTL_SELECTED_IMAGE( DEMO_IMAGE_DIR "icon-reverse-selected.png" );
  37
  38 const char* ROTATE_CLOCKWISE_IMAGE( DEMO_IMAGE_DIR "icon-reset.png" );
  39 const char* ROTATE_CLOCKWISE_SELECTED_IMAGE( DEMO_IMAGE_DIR "icon-reset-selected.png" );
  40
  41 // Child image filenames
  42 const char* IMAGE_PATH[] = {
  43   DEMO_IMAGE_DIR "application-icon-101.png",
  44   DEMO_IMAGE_DIR "application-icon-102.png",
  45   DEMO_IMAGE_DIR "application-icon-103.png",
  46   DEMO_IMAGE_DIR "application-icon-104.png"
  47 };
  48
  49 const unsigned int NUMBER_OF_RESOURCES = sizeof(IMAGE_PATH) / sizeof(char*);
  50
  51 // Helper function to create ImageViews with given filename and size.
  52 void CreateChildImageView( ImageView& imageView, const char* filename, Size size )
  53 {
  54   imageView = ImageView::New();
  55   Property::Map imagePropertyMap;
  56   imagePropertyMap[ Toolkit::Visual::Property::TYPE ] = Toolkit::Visual::IMAGE;
  57   imagePropertyMap[ Toolkit::ImageVisual::Property::URL ] = filename;
  58   imagePropertyMap[ ImageVisual::Property::DESIRED_WIDTH ] = size.width;
  59   imagePropertyMap[ ImageVisual::Property::DESIRED_HEIGHT ] = size.height;
  60   imageView.SetProperty(Toolkit::ImageView::Property::IMAGE , imagePropertyMap );
  61   imageView.SetName("ImageView");
  62   imageView.SetAnchorPoint( AnchorPoint::TOP_LEFT );
  63   imageView.SetResizePolicy( ResizePolicy::FIXED, Dimension::ALL_DIMENSIONS );
  64 }
  65
  66 }  // namespace
  67
  68 namespace Demo
  69 {
  70
  71 LinearExample::LinearExample()
  72 : mLTRDirection(true)
  73 {
  74 }
  75
  76 void LinearExample::Create()
  77 {
  78   auto stage = Stage::GetCurrent();
  79
  80   mDirectionButton = PushButton::New();
  81   mDirectionButton.SetProperty( PushButton::Property::UNSELECTED_ICON, RTL_IMAGE );
  82   mDirectionButton.SetProperty( PushButton::Property::SELECTED_ICON, RTL_SELECTED_IMAGE );
  83   mDirectionButton.ClickedSignal().Connect( this, &LinearExample::OnDirectionClicked );
  84   mDirectionButton.SetParentOrigin( Vector3(0.33f, 1.0f, 0.5f ) );
  85   mDirectionButton.SetAnchorPoint( AnchorPoint::BOTTOM_CENTER );
  86   mDirectionButton.SetSize(75, 75);
  87   stage.Add( mDirectionButton );
  88
  89   mRotateButton = PushButton::New();
  90   mRotateButton.SetProperty( PushButton::Property::UNSELECTED_ICON, ROTATE_CLOCKWISE_IMAGE );
  91   mRotateButton.SetProperty( PushButton::Property::SELECTED_ICON, ROTATE_CLOCKWISE_SELECTED_IMAGE );
  92   mRotateButton.ClickedSignal().Connect( this, &LinearExample::OnRotateClicked );
  93   mRotateButton.SetParentOrigin( Vector3(0.66f, 1.0f, 0.5f ));
  94   mRotateButton.SetAnchorPoint( Vector3(0.5f, 1.0f, 0.5f));
  95   mRotateButton.SetSize(75, 75);
  96   stage.Add( mRotateButton );
  97
  98   // Create a linear layout
  99   mLinearContainer = Control::New();
 100   auto layout = LinearLayout::New();
 101   layout.SetAnimateLayout(true);
 102   layout.SetOrientation( LinearLayout::Orientation::VERTICAL );
 103   DevelControl::SetLayout( mLinearContainer, layout );
 104
 105   mLinearContainer.SetParentOrigin( ParentOrigin::CENTER );
 106   mLinearContainer.SetAnchorPoint( AnchorPoint::CENTER );
 107   mLinearContainer.SetName( "LinearExample" );
 108   stage.Add( mLinearContainer );
 109   mLinearContainer.SetProperty( Toolkit::LayoutItem::ChildProperty::WIDTH_SPECIFICATION, ChildLayoutData::MATCH_PARENT );
 110   mLinearContainer.SetProperty( Toolkit::LayoutItem::ChildProperty::HEIGHT_SPECIFICATION, ChildLayoutData::MATCH_PARENT );
 111   mLinearContainer.SetProperty( Actor::Property::LAYOUT_DIRECTION, LayoutDirection::LEFT_TO_RIGHT );
 112
 113   for( unsigned int x = 0; x < NUMBER_OF_RESOURCES; ++x )
 114   {
 115     Toolkit::ImageView imageView;
 116     CreateChildImageView( imageView, IMAGE_PATH[ x ], Size(100.0f, 100.0f) );
 117     mLinearContainer.Add( imageView );
 118   }
 119 }
 120
 121 // Remove controls added by this example from stage
 122 void LinearExample::Remove()
 123 {
 124   if ( mLinearContainer )
 125   {
 126     UnparentAndReset( mDirectionButton );
 127     UnparentAndReset( mRotateButton );
 128     UnparentAndReset( mLinearContainer);
 129   }
 130 }
 131
 132 // Mirror items in layout
 133 bool LinearExample::OnDirectionClicked( Button button )
 134 {
 135   if( !mLTRDirection )
 136   {
 137     mDirectionButton.SetProperty( PushButton::Property::UNSELECTED_ICON, LTR_IMAGE );
 138     mDirectionButton.SetProperty( PushButton::Property::SELECTED_ICON, LTR_SELECTED_IMAGE );
 139     mLinearContainer.SetProperty( Actor::Property::LAYOUT_DIRECTION, LayoutDirection::LEFT_TO_RIGHT );
 140   }
 141   else
 142   {
 143     mDirectionButton.SetProperty( PushButton::Property::UNSELECTED_ICON, RTL_IMAGE );
 144     mDirectionButton.SetProperty( PushButton::Property::SELECTED_ICON, RTL_SELECTED_IMAGE );
 145     mLinearContainer.SetProperty( Actor::Property::LAYOUT_DIRECTION, LayoutDirection::RIGHT_TO_LEFT );
 146   }
 147   mLTRDirection = !mLTRDirection;
 148   return true;
 149 }
 150
 151 // Rotate layout by changing layout
 152 bool LinearExample::OnRotateClicked( Button button )
 153 {
 154   auto layout = LinearLayout::DownCast( DevelControl::GetLayout( mLinearContainer ) );
 155   if( layout.GetOrientation() == LinearLayout::Orientation::VERTICAL )
 156   {
 157     layout.SetOrientation( LinearLayout::Orientation::HORIZONTAL );
 158   }
 159   else
 160   {
 161     layout.SetOrientation( LinearLayout::Orientation::VERTICAL );
 162   }
 163   return true;
 164 }
 165
 166 } // namespace Demo