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/***************************************************************************
* Copyright (C) 2003 by S�astien Laot *
* slaout@linux62.org *
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2 of the License, or *
* (at your option) any later version. *
* *
* This program is distributed in the hope that it will be useful, *
* but WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
* GNU General Public License for more details. *
* *
* You should have received a copy of the GNU General Public License *
* along with this program; if not, write to the *
* Free Software Foundation, Inc., *
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. *
***************************************************************************/
#include "colorpicker.h"
#include "qtimer.h"
#include <kcolordialog.h>
/// ///
/** DektopColorPicker */
/* From Qt documentation:
* " Note that only visible widgets can grab mouse input.
* If isVisible() returns FALSE for a widget, that widget cannot call grabMouse(). "
* So, we should use an always visible widget to be able to pick a color from screen,
* even by first hidding the main window (user seldomly want to grab a color from BasKet!)
* or use a global shortcut (main window can be hidden when hitting that shortcut).
*/
DesktopColorPicker::DesktopColorPicker()
: QDesktopWidget()
{
setName("DesktopColorPicker");
m_gettingColorFromScreen = false;
}
DesktopColorPicker::~DesktopColorPicker()
{
}
void DesktopColorPicker::pickColor()
{
m_gettingColorFromScreen = true;
// Global::mainContainer->setActive(false);
QTimer::singleShot( 50, this, SLOT(slotDelayedPick()) );
}
/* When firered from basket context menu, and not from menu, grabMouse doesn't work!
* It's perhapse because context menu call slotColorFromScreen() and then
* ungrab the mouse (since menus grab the mouse).
* But why isn't there such bug with normal menus?...
* By calling this method with a QTimer::singleShot, we are sure context menu code is
* finished and we can grab the mouse without loosing the grab:
*/
void DesktopColorPicker::slotDelayedPick()
{
grabKeyboard();
grabMouse(crossCursor);
}
/* Validate the color
*/
void DesktopColorPicker::mouseReleaseEvent(QMouseEvent *event)
{
if (m_gettingColorFromScreen) {
m_gettingColorFromScreen = false;
releaseMouse();
releaseKeyboard();
QColor color = KColorDialog::grabColor(event->globalPos());
emit pickedColor(color);
} else
QDesktopWidget::mouseReleaseEvent(event);
}
/* Cancel the mode
*/
void DesktopColorPicker::keyPressEvent(QKeyEvent *event)
{
if (m_gettingColorFromScreen)
if (event->key() == Qt::Key_Escape) {
m_gettingColorFromScreen = false;
releaseMouse();
releaseKeyboard();
emit canceledPick();
}
QDesktopWidget::keyPressEvent(event);
}
#include "colorpicker.moc"
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