juce/source/extras/the jucer/src/ui/jucer_SnapGridPainter.cpp

   1 /*
   2   ==============================================================================
   3
   4    This file is part of the JUCE library - "Jules' Utility Class Extensions"
   5    Copyright 2004-11 by Raw Material Software Ltd.
   6
   7   ------------------------------------------------------------------------------
   8
   9    JUCE can be redistributed and/or modified under the terms of the GNU General
  10    Public License (Version 2), as published by the Free Software Foundation.
  11    A copy of the license is included in the JUCE distribution, or can be found
  12    online at www.gnu.org/licenses.
  13
  14    JUCE is distributed in the hope that it will be useful, but WITHOUT ANY
  15    WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
  16    A PARTICULAR PURPOSE.  See the GNU General Public License for more details.
  17
  18   ------------------------------------------------------------------------------
  19
  20    To release a closed-source product which uses JUCE, commercial licenses are
  21    available: visit www.rawmaterialsoftware.com/juce for more information.
  22
  23   ==============================================================================
  24 */
  25
  26 #include "../jucer_Headers.h"
  27 #include "jucer_SnapGridPainter.h"
  28
  29
  30 //==============================================================================
  31 SnapGridPainter::SnapGridPainter()
  32     : snapGridSize (-1),
  33       snapShown (false),
  34       backgroundFill (0)
  35 {
  36 }
  37
  38 SnapGridPainter::~SnapGridPainter()
  39 {
  40 }
  41
  42 bool SnapGridPainter::updateFromDesign (JucerDocument& design)
  43 {
  44     if (snapGridSize != design.getSnappingGridSize()
  45          || snapShown != (design.isSnapShown() && design.isSnapActive (false)))
  46     {
  47         snapGridSize = design.getSnappingGridSize();
  48         snapShown = design.isSnapShown() && design.isSnapActive (false);
  49
  50         backgroundFill = Image();
  51         return true;
  52     }
  53
  54     return false;
  55 }
  56
  57 void SnapGridPainter::updateColour()
  58 {
  59     backgroundFill = Image();
  60 }
  61
  62 void SnapGridPainter::draw (Graphics& g, PaintRoutine* backgroundGraphics)
  63 {
  64     if (backgroundFill.isNull() && snapShown)
  65     {
  66         backgroundFill = Image (Image::ARGB, snapGridSize, snapGridSize, true);
  67
  68         Graphics g (backgroundFill);
  69
  70         Colour col (Colours::black);
  71
  72         if (backgroundGraphics != 0)
  73             col = backgroundGraphics->getBackgroundColour().contrasting();
  74
  75         if (snapGridSize > 2)
  76         {
  77             g.setColour (col.withAlpha (0.1f));
  78             g.drawRect (0, 0, snapGridSize + 1, snapGridSize + 1);
  79         }
  80
  81         g.setColour (col.withAlpha (0.35f));
  82         g.setPixel (0, 0);
  83     }
  84
  85     if (backgroundFill.isValid())
  86     {
  87         g.setTiledImageFill (backgroundFill, 0, 0, 1.0f);
  88         g.fillAll();
  89     }
  90 }