examples/layouting/flex-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 "flex-example.h"
  19 #include <dali-toolkit/devel-api/visuals/image-visual-properties-devel.h>
  20 #include <dali-toolkit/devel-api/visual-factory/visual-factory.h>
  21 #include <dali-toolkit/devel-api/controls/control-devel.h>
  22 #include <dali-toolkit/devel-api/layouting/flex-layout.h>
  23
  24 using namespace Dali;
  25 using namespace Dali::Toolkit;
  26
  27 namespace
  28 {
  29
  30 // Button file names
  31 const char* LTR_IMAGE( DEMO_IMAGE_DIR "icon-play.png" );
  32 const char* LTR_SELECTED_IMAGE( DEMO_IMAGE_DIR "icon-play-selected.png" );
  33
  34 const char* RTL_IMAGE( DEMO_IMAGE_DIR "icon-reverse.png" );
  35 const char* RTL_SELECTED_IMAGE( DEMO_IMAGE_DIR "icon-reverse-selected.png" );
  36
  37 const char* ROTATE_CLOCKWISE_IMAGE( DEMO_IMAGE_DIR "icon-reset.png" );
  38 const char* ROTATE_CLOCKWISE_SELECTED_IMAGE( DEMO_IMAGE_DIR "icon-reset-selected.png" );
  39
  40 const char* WRAP_IMAGE( DEMO_IMAGE_DIR "icon-replace.png" );
  41 const char* WRAP_SELECTED_IMAGE( DEMO_IMAGE_DIR "icon-replace-selected.png" );
  42
  43 const char* JUSTIFY_IMAGE( DEMO_IMAGE_DIR "icon-item-view-layout-grid.png" );
  44 const char* JUSTIFY_SELECTED_IMAGE( DEMO_IMAGE_DIR "icon-item-view-layout-grid-selected.png" );
  45
  46 // Child image filenames
  47 const char* IMAGE_PATH[] = {
  48   DEMO_IMAGE_DIR "application-icon-101.png",
  49   DEMO_IMAGE_DIR "application-icon-102.png",
  50   DEMO_IMAGE_DIR "application-icon-103.png",
  51   DEMO_IMAGE_DIR "application-icon-104.png",
  52   DEMO_IMAGE_DIR "application-icon-105.png",
  53   DEMO_IMAGE_DIR "application-icon-106.png",
  54   DEMO_IMAGE_DIR "application-icon-107.png",
  55   DEMO_IMAGE_DIR "application-icon-108.png",
  56   DEMO_IMAGE_DIR "application-icon-109.png",
  57   DEMO_IMAGE_DIR "application-icon-110.png"
  58
  59 };
  60
  61 const unsigned int NUMBER_OF_RESOURCES = sizeof(IMAGE_PATH) / sizeof(char*);
  62
  63 // Helper function to create ImageViews with given filename and size.
  64 void CreateChildImageView( ImageView& imageView, const char* filename, Size size )
  65 {
  66   imageView = ImageView::New();
  67   Property::Map imagePropertyMap;
  68   imagePropertyMap[ Toolkit::Visual::Property::TYPE ] = Toolkit::Visual::IMAGE;
  69   imagePropertyMap[ Toolkit::ImageVisual::Property::URL ] = filename;
  70   imagePropertyMap[ ImageVisual::Property::DESIRED_WIDTH ] = size.width;
  71   imagePropertyMap[ ImageVisual::Property::DESIRED_HEIGHT ] = size.height;
  72   imageView.SetProperty( Toolkit::ImageView::Property::IMAGE , imagePropertyMap );
  73   imageView.SetName("ImageView");
  74   imageView.SetAnchorPoint( AnchorPoint::TOP_LEFT );
  75   imageView.SetResizePolicy( ResizePolicy::FIXED, Dimension::ALL_DIMENSIONS );
  76 }
  77
  78 }  // namespace
  79
  80 namespace Demo
  81 {
  82
  83 FlexExample::FlexExample()
  84 : mLTRDirection(true)
  85 {
  86
  87 }
  88
  89 void FlexExample::Create()
  90 {
  91   // The Init signal is received once (only) during the Application lifetime
  92   auto stage = Stage::GetCurrent();
  93
  94   mDirectionButton = PushButton::New();
  95   mDirectionButton.SetProperty( PushButton::Property::UNSELECTED_ICON, RTL_IMAGE );
  96   mDirectionButton.SetProperty( PushButton::Property::SELECTED_ICON, RTL_SELECTED_IMAGE );
  97   mDirectionButton.ClickedSignal().Connect( this, &FlexExample::OnDirectionClicked );
  98   mDirectionButton.SetParentOrigin( Vector3(0.2f, 1.0f, 0.5f ) );
  99   mDirectionButton.SetAnchorPoint( AnchorPoint::BOTTOM_CENTER );
 100   mDirectionButton.SetSize(75, 75);
 101   stage.Add( mDirectionButton );
 102
 103   mWrapButton = Toolkit::PushButton::New();
 104   mWrapButton.SetProperty( PushButton::Property::UNSELECTED_ICON, WRAP_IMAGE );
 105   mWrapButton.SetProperty( PushButton::Property::SELECTED_ICON, WRAP_SELECTED_IMAGE );
 106   mWrapButton.ClickedSignal().Connect( this, &FlexExample::OnWrapClicked );
 107   mWrapButton.SetParentOrigin( Vector3(0.4f, 1.0f, 0.5f ));
 108   mWrapButton.SetAnchorPoint( AnchorPoint::BOTTOM_CENTER );
 109   mWrapButton.SetSize(75, 75);
 110   stage.Add( mWrapButton );
 111
 112   mJustifyButton = Toolkit::PushButton::New();
 113   mJustifyButton.SetProperty( PushButton::Property::UNSELECTED_ICON, JUSTIFY_IMAGE );
 114   mJustifyButton.SetProperty( PushButton::Property::SELECTED_ICON, JUSTIFY_SELECTED_IMAGE );
 115   mJustifyButton.ClickedSignal().Connect( this, &FlexExample::OnJustifyClicked );
 116   mJustifyButton.SetParentOrigin( Vector3(0.6f, 1.0f, 0.5f ));
 117   mJustifyButton.SetAnchorPoint( AnchorPoint::BOTTOM_CENTER );
 118   mJustifyButton.SetSize(75, 75);
 119   stage.Add( mJustifyButton );
 120
 121   mRotateButton = PushButton::New();
 122   mRotateButton.SetProperty( PushButton::Property::UNSELECTED_ICON, ROTATE_CLOCKWISE_IMAGE );
 123   mRotateButton.SetProperty( PushButton::Property::SELECTED_ICON, ROTATE_CLOCKWISE_SELECTED_IMAGE );
 124   mRotateButton.ClickedSignal().Connect( this, &FlexExample::OnRotateClicked );
 125   mRotateButton.SetParentOrigin( Vector3(0.8f, 1.0f, 0.5f ));
 126   mRotateButton.SetAnchorPoint( AnchorPoint::BOTTOM_CENTER );
 127   mRotateButton.SetSize(75, 75);
 128   stage.Add( mRotateButton );
 129
 130   // Create a flex container
 131   mFlexContainer = Control::New();
 132
 133   auto layout = FlexLayout::New();
 134   layout.SetAnimateLayout( true );
 135   layout.SetFlexDirection( Toolkit::FlexLayout::FlexDirection::ROW );
 136   layout.SetFlexWrap( Toolkit::FlexLayout::WrapType::NO_WRAP );
 137   layout.SetFlexJustification( Toolkit::FlexLayout::Justification::FLEX_START );
 138   layout.SetFlexAlignment( Toolkit::FlexLayout::Alignment::FLEX_START );
 139
 140   DevelControl::SetLayout( mFlexContainer, layout );
 141
 142   mFlexContainer.SetParentOrigin( ParentOrigin::CENTER );
 143   mFlexContainer.SetAnchorPoint( AnchorPoint::CENTER );
 144   mFlexContainer.SetName( "FlexExample" );
 145   mFlexContainer.SetProperty( Toolkit::LayoutItem::ChildProperty::WIDTH_SPECIFICATION, ChildLayoutData::MATCH_PARENT );
 146   mFlexContainer.SetProperty( Toolkit::LayoutItem::ChildProperty::HEIGHT_SPECIFICATION, ChildLayoutData::MATCH_PARENT );
 147   mFlexContainer.SetAnchorPoint( AnchorPoint::CENTER );
 148   mFlexContainer.SetProperty( Actor::Property::LAYOUT_DIRECTION, LayoutDirection::LEFT_TO_RIGHT );
 149
 150   for( unsigned int x = 0; x < NUMBER_OF_RESOURCES; ++x )
 151   {
 152     Toolkit::ImageView imageView;
 153     CreateChildImageView( imageView, IMAGE_PATH[ x ], Size(100.0f, 100.0f) );
 154     imageView.SetProperty( Toolkit::Control::Property::PADDING, Extents(0.f, 0.f, 0.f, 0.f) );
 155     imageView.SetProperty( Toolkit::Control::Property::MARGIN, Extents(2.0f, 2.0f, 2.0f, 2.0f) );
 156     imageView.SetProperty( Toolkit::FlexLayout::ChildProperty::ALIGN_SELF, Toolkit::FlexLayout::Alignment::CENTER );
 157     imageView.SetProperty( Toolkit::FlexLayout::ChildProperty::FLEX, 0.f );
 158     mFlexContainer.Add( imageView );
 159   }
 160   stage.Add( mFlexContainer );
 161 }
 162
 163 // Remove controls added by this example from stage
 164 void FlexExample::Remove()
 165 {
 166   if ( mFlexContainer )
 167   {
 168     UnparentAndReset( mDirectionButton );
 169     UnparentAndReset( mWrapButton );
 170     UnparentAndReset( mJustifyButton );
 171     UnparentAndReset( mRotateButton );
 172     UnparentAndReset( mFlexContainer);
 173   }
 174 }
 175
 176 // Mirror items in layout
 177 bool FlexExample::OnDirectionClicked( Button button )
 178 {
 179   mLTRDirection = !mLTRDirection;
 180   if( mLTRDirection )
 181   {
 182     mDirectionButton.SetProperty( PushButton::Property::UNSELECTED_ICON, LTR_IMAGE );
 183     mDirectionButton.SetProperty( PushButton::Property::SELECTED_ICON, LTR_SELECTED_IMAGE );
 184     mFlexContainer.SetProperty( Actor::Property::LAYOUT_DIRECTION, LayoutDirection::LEFT_TO_RIGHT );
 185   }
 186   else
 187   {
 188     mDirectionButton.SetProperty( PushButton::Property::UNSELECTED_ICON, RTL_IMAGE );
 189     mDirectionButton.SetProperty( PushButton::Property::SELECTED_ICON, RTL_SELECTED_IMAGE );
 190     mFlexContainer.SetProperty( Actor::Property::LAYOUT_DIRECTION, LayoutDirection::RIGHT_TO_LEFT );
 191   }
 192   return true;
 193 }
 194
 195 // Rotate layout by changing layout
 196 bool FlexExample::OnRotateClicked( Button button )
 197 {
 198   auto layout = FlexLayout::DownCast(DevelControl::GetLayout( mFlexContainer ));
 199   if( layout.GetFlexDirection() == Toolkit::FlexLayout::FlexDirection::COLUMN )
 200   {
 201     layout.SetFlexDirection( Toolkit::FlexLayout::FlexDirection::ROW );
 202   }
 203   else
 204   {
 205     layout.SetFlexDirection( Toolkit::FlexLayout::FlexDirection::COLUMN );
 206   }
 207   return true;
 208 }
 209
 210 // Alternates the layout wrapping from wrapping to none
 211 bool FlexExample::OnWrapClicked( Button button )
 212 {
 213   auto layout = FlexLayout::DownCast(DevelControl::GetLayout( mFlexContainer ));
 214   if ( layout.GetFlexWrap() == Toolkit::FlexLayout::WrapType::NO_WRAP )
 215   {
 216     layout.SetFlexWrap( Toolkit::FlexLayout::WrapType::WRAP );
 217     layout.SetFlexAlignment( Toolkit::FlexLayout::Alignment::CENTER );
 218     mFlexContainer.SetProperty( Toolkit::Control::Property::PADDING, Extents(0.0f, 0.0f, 45.0f, 75.0f) );
 219   }
 220   else
 221   {
 222     layout.SetFlexWrap( Toolkit::FlexLayout::WrapType::NO_WRAP );
 223     layout.SetFlexAlignment( Toolkit::FlexLayout::Alignment::FLEX_START );
 224     mFlexContainer.SetProperty( Toolkit::Control::Property::PADDING, Extents(0.0f, 0.0f, 0.0f, 0.0f) );
 225   }
 226   return true;
 227 }
 228
 229 // Alternates the layout to justify space between items or not
 230 bool FlexExample::OnJustifyClicked( Button button )
 231 {
 232    auto layout = FlexLayout::DownCast(DevelControl::GetLayout( mFlexContainer ));
 233    if ( layout.GetFlexJustification() == Toolkit::FlexLayout::Justification::FLEX_START )
 234    {
 235      layout.SetFlexJustification( Toolkit::FlexLayout::Justification::SPACE_BETWEEN);
 236    }
 237    else
 238    {
 239      layout.SetFlexJustification( Toolkit::FlexLayout::Justification::FLEX_START );
 240    }
 241    return true;
 242 }
 243
 244 } // namespace Demo