git.sesse.net Git - kdenlive/blob - src/colorpickerwidget.cpp

   1 /***************************************************************************
   2  *   Copyright (C) 2010 by Till Theato (root@ttill.de)                     *
   3  *                                                                         *
   4  *   This program is free software; you can redistribute it and/or modify  *
   5  *   it under the terms of the GNU General Public License as published by  *
   6  *   the Free Software Foundation; either version 2 of the License, or     *
   7  *   (at your option) any later version.                                   *
   8  *                                                                         *
   9  *   This program is distributed in the hope that it will be useful,       *
  10  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  11  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  12  *   GNU General Public License for more details.                          *
  13  *                                                                         *
  14  *   You should have received a copy of the GNU General Public License     *
  15  *   along with this program; if not, write to the                         *
  16  *   Free Software Foundation, Inc.,                                       *
  17  *   51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA          *
  18  ***************************************************************************/
  19
  20
  21 #include "colorpickerwidget.h"
  22
  23 #include <QMouseEvent>
  24 #include <QPushButton>
  25 #include <QDesktopWidget>
  26
  27 #include <KApplication>
  28 #include <KColorDialog>
  29 #include <KIcon>
  30 #include <KLocalizedString>
  31
  32 #ifdef Q_WS_X11
  33 #include <X11/Xlib.h>
  34 #include <X11/Xutil.h>
  35 #include <QX11Info>
  36 #include <fixx11h.h>
  37
  38 class KCDPickerFilter: public QWidget
  39 {
  40 public:
  41     KCDPickerFilter(QWidget* parent): QWidget(parent) {}
  42
  43     virtual bool x11Event(XEvent* event) {
  44         if (event->type == ButtonRelease) {
  45             QMouseEvent e(QEvent::MouseButtonRelease, QPoint(),
  46             QPoint(event->xmotion.x_root, event->xmotion.y_root) , Qt::NoButton, Qt::NoButton, Qt::NoModifier);
  47             QApplication::sendEvent(parentWidget(), &e);
  48             return true;
  49         }
  50         return false;
  51     }
  52 };
  53 #endif
  54
  55
  56 ColorPickerWidget::ColorPickerWidget(QWidget *parent) :
  57         QWidget(parent),
  58         m_filterActive(false)
  59 {
  60 #ifdef Q_WS_X11
  61     m_filter = 0;
  62 #endif
  63
  64     QPushButton *button = new QPushButton(this);
  65     button->setIcon(KIcon("color-picker"));
  66     button->setToolTip(i18n("Pick a color on the screen"));
  67     connect(button, SIGNAL(clicked()), this, SLOT(slotSetupEventFilter()));
  68 }
  69
  70 ColorPickerWidget::~ColorPickerWidget()
  71 {
  72 #ifdef Q_WS_X11
  73     if (m_filterActive && kapp)
  74         kapp->removeX11EventFilter(m_filter);
  75 #endif
  76 }
  77
  78 void ColorPickerWidget::mouseReleaseEvent(QMouseEvent* event)
  79 {
  80     if (m_filterActive) {
  81         closeEventFilter();
  82         emit colorPicked(KColorDialog::grabColor(event->globalPos()));
  83         return;
  84     }
  85     QWidget::mouseReleaseEvent(event);
  86 }
  87
  88 void ColorPickerWidget::keyPressEvent(QKeyEvent* event)
  89 {
  90     if (m_filterActive) {
  91         if (event->key() == Qt::Key_Escape)
  92             closeEventFilter();
  93         event->accept();
  94         return;
  95     }
  96     QWidget::keyPressEvent(event);
  97 }
  98
  99 void ColorPickerWidget::slotSetupEventFilter()
 100 {
 101     m_filterActive = true;
 102 #ifdef Q_WS_X11
 103     m_filter = new KCDPickerFilter(this);
 104     kapp->installX11EventFilter(m_filter);
 105 #endif
 106     grabMouse(Qt::CrossCursor);
 107     grabKeyboard();
 108 }
 109
 110 void ColorPickerWidget::closeEventFilter()
 111 {
 112     m_filterActive = false;
 113 #ifdef Q_WS_X11
 114     kapp->removeX11EventFilter(m_filter);
 115     delete m_filter;
 116     m_filter = 0;
 117 #endif
 118     releaseMouse();
 119     releaseKeyboard();
 120 }
 121
 122 #include "colorpickerwidget.moc"