kolourpaint/tools/kpToolColorPicker.cpp

   1
   2 /*
   3    Copyright (c) 2003-2007 Clarence Dang <dang@kde.org>
   4    All rights reserved.
   5
   6    Redistribution and use in source and binary forms, with or without
   7    modification, are permitted provided that the following conditions
   8    are met:
   9
  10    1. Redistributions of source code must retain the above copyright
  11       notice, this list of conditions and the following disclaimer.
  12    2. Redistributions in binary form must reproduce the above copyright
  13       notice, this list of conditions and the following disclaimer in the
  14       documentation and/or other materials provided with the distribution.
  15
  16    THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  17    IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  18    OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  19    IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  20    INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  21    NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  22    DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  23    THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  24    (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  25    THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  26 */
  27
  28
  29 #define DEBUG_KP_TOOL_COLOR_PICKER 0
  30
  31
  32 #include <kpToolColorPicker.h>
  33
  34 #include <kdebug.h>
  35 #include <klocale.h>
  36
  37 #include <kpColorToolBar.h>
  38 #include <kpCommandHistory.h>
  39 #include <kpDefs.h>
  40 #include <kpDocument.h>
  41 #include <kpPixmapFX.h>
  42 #include <kpToolColorPickerCommand.h>
  43 #include <kpToolEnvironment.h>
  44
  45
  46 kpToolColorPicker::kpToolColorPicker (kpToolEnvironment *environ, QObject *parent)
  47     : kpTool (i18n ("Color Picker"), i18n ("Lets you select a color from the image"),
  48               Qt::Key_C,
  49               environ, parent, "tool_color_picker")
  50 {
  51 }
  52
  53 kpToolColorPicker::~kpToolColorPicker ()
  54 {
  55 }
  56
  57
  58 // private
  59 kpColor kpToolColorPicker::colorAtPixel (const QPoint &p)
  60 {
  61 #if DEBUG_KP_TOOL_COLOR_PICKER && 0
  62     kDebug () << "kpToolColorPicker::colorAtPixel" << p;
  63 #endif
  64
  65     return kpPixmapFX::getColorAtPixel (document ()->image (), p);
  66 }
  67
  68
  69 // private
  70 QString kpToolColorPicker::haventBegunDrawUserMessage () const
  71 {
  72     return i18n ("Click to select a color.");
  73 }
  74
  75
  76 // public virtual [base kpTool]
  77 void kpToolColorPicker::begin ()
  78 {
  79     setUserMessage (haventBegunDrawUserMessage ());
  80 }
  81
  82 // public virtual [base kpTool]
  83 void kpToolColorPicker::beginDraw ()
  84 {
  85     m_oldColor = color (mouseButton ());
  86
  87     setUserMessage (cancelUserMessage ());
  88 }
  89
  90 // public virtual [base kpTool]
  91 void kpToolColorPicker::draw (const QPoint &thisPoint, const QPoint &, const QRect &)
  92 {
  93     const kpColor color = colorAtPixel (thisPoint);
  94
  95     if (color.isValid ())
  96     {
  97         environ ()->setColor (mouseButton (), color);
  98         setUserShapePoints (thisPoint);
  99     }
 100     else
 101     {
 102         environ ()->setColor (mouseButton (), m_oldColor);
 103         setUserShapePoints ();
 104     }
 105 }
 106
 107 // public virtual [base kpTool]
 108 void kpToolColorPicker::cancelShape ()
 109 {
 110     environ ()->setColor (mouseButton (), m_oldColor);
 111
 112     setUserMessage (i18n ("Let go of all the mouse buttons."));
 113 }
 114
 115 // public virtual [base kpTool]
 116 void kpToolColorPicker::releasedAllButtons ()
 117 {
 118     setUserMessage (haventBegunDrawUserMessage ());
 119
 120 }
 121
 122 // public virtual [base kpTool]
 123 void kpToolColorPicker::endDraw (const QPoint &thisPoint, const QRect &)
 124 {
 125     const kpColor color = colorAtPixel (thisPoint);
 126
 127     if (color.isValid ())
 128     {
 129         kpToolColorPickerCommand *cmd =
 130             new kpToolColorPickerCommand (
 131                 mouseButton (),
 132                 color, m_oldColor,
 133                 environ ()->commandEnvironment ());
 134
 135         environ ()->commandHistory ()->addCommand (cmd, false/*no exec*/);
 136         setUserMessage (haventBegunDrawUserMessage ());
 137     }
 138     else
 139     {
 140         cancelShape ();
 141     }
 142 }
 143
 144
 145 #include <kpToolColorPicker.moc>