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/*
* colourcombo.cpp - colour selection combo box
* Program: kalarm
* Copyright (c) 2001 - 2003, 2005 by David Jarvie <software@astrojar.org.uk>
*
* Some code taken from kdelibs/kdeui/kcolorcombo.cpp in the KDE libraries:
* Copyright (C) 1997 Martin Jones (mjones@kde.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 <qpainter.h>
#include <klocale.h>
#include <kcolordialog.h>
#include "preferences.h"
#include "colourcombo.moc"
ColourCombo::ColourCombo(QWidget* parent, const char* name, const QColor& defaultColour)
: QComboBox(parent, name),
mColourList(Preferences::messageColours()),
mSelectedColour(defaultColour),
mCustomColour(255, 255, 255),
mReadOnly(false),
mDisabled(false)
{
addColours();
connect(this, SIGNAL(activated(int)), SLOT(slotActivated(int)));
connect(this, SIGNAL(highlighted(int)), SLOT(slotHighlighted(int)));
Preferences::connect(SIGNAL(preferencesChanged()), this, SLOT(slotPreferencesChanged()));
}
void ColourCombo::setColour(const QColor& colour)
{
mSelectedColour = colour;
addColours();
}
/******************************************************************************
* Set a new colour selection.
*/
void ColourCombo::setColours(const ColourList& colours)
{
mColourList = colours;
if (mSelectedColour != mCustomColour
&& !mColourList.contains(mSelectedColour))
{
// The current colour has been deleted
mSelectedColour = mColourList.count() ? mColourList.first() : mCustomColour;
}
addColours();
}
/******************************************************************************
* Called when the user changes the preference settings.
* If the colour list has changed, update the colours displayed.
*/
void ColourCombo::slotPreferencesChanged()
{
const ColourList& prefColours = Preferences::messageColours();
if (prefColours != mColourList)
setColours(prefColours); // update the display with the new colours
}
/******************************************************************************
* Enable or disable the control.
* If it is disabled, its colour is set to the dialog background colour.
*/
void ColourCombo::setEnabled(bool enable)
{
if (enable && mDisabled)
{
mDisabled = false;
setColour(mSelectedColour);
}
else if (!enable && !mDisabled)
{
mSelectedColour = color();
int end = count();
if (end > 1)
{
// Add a dialog background colour item
QPixmap pm = *pixmap(1);
pm.fill(paletteBackgroundColor());
insertItem(pm);
setCurrentItem(end);
}
mDisabled = true;
}
QComboBox::setEnabled(enable);
}
void ColourCombo::slotActivated(int index)
{
if (index)
mSelectedColour = mColourList[index - 1];
else
{
if (KColorDialog::getColor(mCustomColour, this) == QDialog::Accepted)
{
QRect rect;
drawCustomItem(rect, false);
}
mSelectedColour = mCustomColour;
}
emit activated(mSelectedColour);
}
void ColourCombo::slotHighlighted(int index)
{
mSelectedColour = index ? mColourList[index - 1] : mCustomColour;
emit highlighted(mSelectedColour);
}
/******************************************************************************
* Initialise the items in the combo box to one for each colour in the list.
*/
void ColourCombo::addColours()
{
clear();
for (ColourList::const_iterator it = mColourList.begin(); ; ++it)
{
if (it == mColourList.end())
{
mCustomColour = mSelectedColour;
break;
}
if (mSelectedColour == *it)
break;
}
QRect rect;
drawCustomItem(rect, true);
QPainter painter;
QPixmap pixmap(rect.width(), rect.height());
int i = 1;
for (ColourList::const_iterator it = mColourList.begin(); it != mColourList.end(); ++i, ++it)
{
painter.begin(&pixmap);
QBrush brush(*it);
painter.fillRect(rect, brush);
painter.end();
insertItem(pixmap);
pixmap.detach();
if (*it == mSelectedColour.rgb())
setCurrentItem(i);
}
}
void ColourCombo::drawCustomItem(QRect& rect, bool insert)
{
QPen pen;
if (qGray(mCustomColour.rgb()) < 128)
pen.setColor(Qt::white);
else
pen.setColor(Qt::black);
QPainter painter;
QFontMetrics fm = QFontMetrics(painter.font());
rect.setRect(0, 0, width(), fm.height() + 4);
QPixmap pixmap(rect.width(), rect.height());
painter.begin(&pixmap);
QBrush brush(mCustomColour);
painter.fillRect(rect, brush);
painter.setPen(pen);
painter.drawText(2, fm.ascent() + 2, i18n("Custom..."));
painter.end();
if (insert)
insertItem(pixmap);
else
changeItem(pixmap, 0);
pixmap.detach();
}
void ColourCombo::setReadOnly(bool ro)
{
mReadOnly = ro;
}
void ColourCombo::resizeEvent(QResizeEvent* re)
{
QComboBox::resizeEvent(re);
addColours();
}
void ColourCombo::mousePressEvent(QMouseEvent* e)
{
if (mReadOnly)
{
// Swallow up the event if it's the left button
if (e->button() == Qt::LeftButton)
return;
}
QComboBox::mousePressEvent(e);
}
void ColourCombo::mouseReleaseEvent(QMouseEvent* e)
{
if (!mReadOnly)
QComboBox::mouseReleaseEvent(e);
}
void ColourCombo::mouseMoveEvent(QMouseEvent* e)
{
if (!mReadOnly)
QComboBox::mouseMoveEvent(e);
}
void ColourCombo::keyPressEvent(QKeyEvent* e)
{
if (!mReadOnly || e->key() == Qt::Key_Escape)
QComboBox::keyPressEvent(e);
}
void ColourCombo::keyReleaseEvent(QKeyEvent* e)
{
if (!mReadOnly)
QComboBox::keyReleaseEvent(e);
}
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