JUCE/examples/Demo/Source/Demos/GridDemo.cpp

/*
  ==============================================================================

   This file is part of the JUCE library.
   Copyright (c) 2017 - ROLI Ltd.

   JUCE is an open source library subject to commercial or open-source
   licensing.

   By using JUCE, you agree to the terms of both the JUCE 5 End-User License
   Agreement and JUCE 5 Privacy Policy (both updated and effective as of the
   27th April 2017).

   End User License Agreement: www.juce.com/juce-5-licence
   Privacy Policy: www.juce.com/juce-5-privacy-policy

   Or: You may also use this code under the terms of the GPL v3 (see
   www.gnu.org/licenses).

   JUCE IS PROVIDED "AS IS" WITHOUT ANY WARRANTY, AND ALL WARRANTIES, WHETHER
   EXPRESSED OR IMPLIED, INCLUDING MERCHANTABILITY AND FITNESS FOR PURPOSE, ARE
   DISCLAIMED.

  ==============================================================================
*/

#include "../JuceDemoHeader.h"

// these classes are C++11-only
#if JUCE_HAS_CONSTEXPR && JUCE_COMPILER_SUPPORTS_INITIALIZER_LISTS

 struct GridDemo   : public Component
 {
     GridDemo()
     {
         addGridItemPanel (Colours::aquamarine, "0");
         addGridItemPanel (Colours::red,        "1");
         addGridItemPanel (Colours::blue,       "2");
         addGridItemPanel (Colours::green,      "3");
         addGridItemPanel (Colours::orange,     "4");
         addGridItemPanel (Colours::white,      "5");
         addGridItemPanel (Colours::aquamarine, "6");
         addGridItemPanel (Colours::red,        "7");
         addGridItemPanel (Colours::blue,       "8");
         addGridItemPanel (Colours::green,      "9");
         addGridItemPanel (Colours::orange,     "10");
         addGridItemPanel (Colours::white,      "11");
     }

     void addGridItemPanel (Colour colour, const char* text)
     {
         addAndMakeVisible (items.add (new GridItemPanel (colour, text)));
     }

     void paint (Graphics& g) override
     {
         g.fillAll (Colours::black);
     }

     void resized() override
     {
          Grid grid;

          grid.rowGap    = 20_px;
          grid.columnGap = 20_px;

          using Track = Grid::TrackInfo;

          grid.templateRows = { Track (1_fr), Track (1_fr), Track (1_fr) };

          grid.templateColumns = { Track (1_fr),
                                   Track (1_fr),
                                   Track (1_fr) };


          grid.autoColumns = Track (1_fr);
          grid.autoRows    = Track (1_fr);

          grid.autoFlow = Grid::AutoFlow::column;

          grid.items.addArray ({ GridItem (items[0]).withArea (2, 2, 4, 4),
                                 GridItem (items[1]),
                                 GridItem (items[2]).withArea ({}, 3),
                                 GridItem (items[3]),
                                 GridItem (items[4]).withArea (GridItem::Span (2), {}),
                                 GridItem (items[5]),
                                 GridItem (items[6]),
                                 GridItem (items[7]),
                                 GridItem (items[8]),
                                 GridItem (items[9]),
                                 GridItem (items[10]),
                                 GridItem (items[11])
                               });

          grid.performLayout (getLocalBounds());
     }

     //==============================================================================
     struct GridItemPanel  : public Component
     {
         GridItemPanel (Colour colourToUse, const String& textToUse)
             : colour (colourToUse),
               text (textToUse)
         {}

         void paint (Graphics& g) override
         {
             g.fillAll (colour.withAlpha (0.5f));

             g.setColour (Colours::black);
             g.drawText (text, getLocalBounds().withSizeKeepingCentre (100, 100), Justification::centred, false);
         }

         Colour colour;
         String text;
     };

     OwnedArray<GridItemPanel> items;
 };

 // This static object will register this demo type in a global list of demos..
 static JuceDemoType<GridDemo> demo ("10 Components: GridDemo");

#endif