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 const char* const TITLE = "Linear Example";
  31
  32 // Button file names
  33 const char* LTR_IMAGE( DEMO_IMAGE_DIR "icon-play.png" );
  34 const char* LTR_SELECTED_IMAGE( DEMO_IMAGE_DIR "icon-play-selected.png" );
  35
  36 const char* RTL_IMAGE( DEMO_IMAGE_DIR "icon-reverse.png" );
  37 const char* RTL_SELECTED_IMAGE( DEMO_IMAGE_DIR "icon-reverse-selected.png" );
  38
  39 const char* ROTATE_CLOCKWISE_IMAGE( DEMO_IMAGE_DIR "icon-reset.png" );
  40 const char* ROTATE_CLOCKWISE_SELECTED_IMAGE( DEMO_IMAGE_DIR "icon-reset-selected.png" );
  41
  42 // Child image filenames
  43 const char* IMAGE_PATH[] = {
  44   DEMO_IMAGE_DIR "application-icon-101.png",
  45   DEMO_IMAGE_DIR "application-icon-102.png",
  46   DEMO_IMAGE_DIR "application-icon-103.png",
  47   DEMO_IMAGE_DIR "application-icon-104.png"
  48 };
  49
  50 const unsigned int NUMBER_OF_RESOURCES = sizeof(IMAGE_PATH) / sizeof(char*);
  51
  52 // Helper function to create ImageViews with given filename and size.
  53 void CreateChildImageView( ImageView& imageView, const char* filename, Size size )
  54 {
  55   imageView = ImageView::New();
  56   Property::Map imagePropertyMap;
  57   imagePropertyMap[ Toolkit::Visual::Property::TYPE ] = Toolkit::Visual::IMAGE;
  58   imagePropertyMap[ Toolkit::ImageVisual::Property::URL ] = filename;
  59   imagePropertyMap[ ImageVisual::Property::DESIRED_WIDTH ] = size.width;
  60   imagePropertyMap[ ImageVisual::Property::DESIRED_HEIGHT ] = size.height;
  61   imageView.SetProperty(Toolkit::ImageView::Property::IMAGE , imagePropertyMap );
  62   imageView.SetName("ImageView");
  63   imageView.SetAnchorPoint( AnchorPoint::TOP_LEFT );
  64   imageView.SetResizePolicy( ResizePolicy::FIXED, Dimension::ALL_DIMENSIONS );
  65 }
  66
  67 }  // namespace
  68
  69 namespace Demo
  70 {
  71
  72 LinearExample::LinearExample()
  73 : Example( TITLE ),
  74   mLTRDirection(true)
  75 {
  76 }
  77
  78 void LinearExample::Create()
  79 {
  80   auto stage = Stage::GetCurrent();
  81
  82   mDirectionButton = PushButton::New();
  83   mDirectionButton.SetProperty( PushButton::Property::UNSELECTED_ICON, RTL_IMAGE );
  84   mDirectionButton.SetProperty( PushButton::Property::SELECTED_ICON, RTL_SELECTED_IMAGE );
  85   mDirectionButton.ClickedSignal().Connect( this, &LinearExample::OnDirectionClicked );
  86   mDirectionButton.SetParentOrigin( Vector3(0.33f, 1.0f, 0.5f ) );
  87   mDirectionButton.SetAnchorPoint( AnchorPoint::BOTTOM_CENTER );
  88   mDirectionButton.SetSize(75, 75);
  89   stage.Add( mDirectionButton );
  90
  91   mRotateButton = PushButton::New();
  92   mRotateButton.SetProperty( PushButton::Property::UNSELECTED_ICON, ROTATE_CLOCKWISE_IMAGE );
  93   mRotateButton.SetProperty( PushButton::Property::SELECTED_ICON, ROTATE_CLOCKWISE_SELECTED_IMAGE );
  94   mRotateButton.ClickedSignal().Connect( this, &LinearExample::OnRotateClicked );
  95   mRotateButton.SetParentOrigin( Vector3(0.66f, 1.0f, 0.5f ));
  96   mRotateButton.SetAnchorPoint( Vector3(0.5f, 1.0f, 0.5f));
  97   mRotateButton.SetSize(75, 75);
  98   stage.Add( mRotateButton );
  99
 100   // Create a linear layout
 101   mLinearContainer = Control::New();
 102   auto layout = LinearLayout::New();
 103   layout.SetAnimateLayout(true);
 104   layout.SetOrientation( LinearLayout::Orientation::VERTICAL );
 105   DevelControl::SetLayout( mLinearContainer, layout );
 106
 107   mLinearContainer.SetParentOrigin( ParentOrigin::CENTER );
 108   mLinearContainer.SetAnchorPoint( AnchorPoint::CENTER );
 109   mLinearContainer.SetName( "LinearExample" );
 110   stage.Add( mLinearContainer );
 111   mLinearContainer.SetProperty( Toolkit::LayoutItem::ChildProperty::WIDTH_SPECIFICATION, ChildLayoutData::MATCH_PARENT );
 112   mLinearContainer.SetProperty( Toolkit::LayoutItem::ChildProperty::HEIGHT_SPECIFICATION, ChildLayoutData::MATCH_PARENT );
 113   mLinearContainer.SetProperty( Actor::Property::LAYOUT_DIRECTION, LayoutDirection::LEFT_TO_RIGHT );
 114
 115   for( unsigned int x = 0; x < NUMBER_OF_RESOURCES; ++x )
 116   {
 117     Toolkit::ImageView imageView;
 118     CreateChildImageView( imageView, IMAGE_PATH[ x ], Size(100.0f, 100.0f) );
 119     mLinearContainer.Add( imageView );
 120   }
 121 }
 122
 123 // Remove controls added by this example from stage
 124 void LinearExample::Remove()
 125 {
 126   if ( mLinearContainer )
 127   {
 128     UnparentAndReset( mDirectionButton );
 129     UnparentAndReset( mRotateButton );
 130     UnparentAndReset( mLinearContainer);
 131   }
 132 }
 133
 134 // Mirror items in layout
 135 bool LinearExample::OnDirectionClicked( Button button )
 136 {
 137   if( !mLTRDirection )
 138   {
 139     mDirectionButton.SetProperty( PushButton::Property::UNSELECTED_ICON, LTR_IMAGE );
 140     mDirectionButton.SetProperty( PushButton::Property::SELECTED_ICON, LTR_SELECTED_IMAGE );
 141     mLinearContainer.SetProperty( Actor::Property::LAYOUT_DIRECTION, LayoutDirection::LEFT_TO_RIGHT );
 142   }
 143   else
 144   {
 145     mDirectionButton.SetProperty( PushButton::Property::UNSELECTED_ICON, RTL_IMAGE );
 146     mDirectionButton.SetProperty( PushButton::Property::SELECTED_ICON, RTL_SELECTED_IMAGE );
 147     mLinearContainer.SetProperty( Actor::Property::LAYOUT_DIRECTION, LayoutDirection::RIGHT_TO_LEFT );
 148   }
 149   mLTRDirection = !mLTRDirection;
 150   return true;
 151 }
 152
 153 // Rotate layout by changing layout
 154 bool LinearExample::OnRotateClicked( Button button )
 155 {
 156   auto layout = LinearLayout::DownCast( DevelControl::GetLayout( mLinearContainer ) );
 157   if( layout.GetOrientation() == LinearLayout::Orientation::VERTICAL )
 158   {
 159     layout.SetOrientation( LinearLayout::Orientation::HORIZONTAL );
 160   }
 161   else
 162   {
 163     layout.SetOrientation( LinearLayout::Orientation::VERTICAL );
 164   }
 165   return true;
 166 }
 167
 168 } // namespace Demo