plasma-framework/widgets/combobox.cpp

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/*
* Copyright 2008 Aaron Seigo <aseigo@kde.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU Library General Public License as
* published by the Free Software Foundation; either version 2, 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 Library 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 "combobox.h"
#include <QPainter>
#include <QApplication>
#include <kcombobox.h>
#include <kmimetype.h>
#include <kiconeffect.h>
#include <kiconloader.h>
#include <plasma/private/style_p.h>
#include "theme.h"
#include "framesvg.h"
#include "animator.h"
#include "paintutils.h"
namespace Plasma
{
class ComboBoxPrivate
{
public:
ComboBoxPrivate(ComboBox *comboBox)
: q(comboBox),
background(0),
customFont(0),
underMouse(false)
{
}
~ComboBoxPrivate()
{
}
void syncActiveRect();
void syncBorders();
void animationUpdate(qreal progress);
void animationFinished(int id);
ComboBox *q;
FrameSvg *background;
FrameSvg *lineEditBackground;
int animId;
bool fadeIn;
qreal opacity;
QRectF activeRect;
Style::Ptr style;
bool customFont;
bool underMouse;
};
void ComboBoxPrivate::syncActiveRect()
{
background->setElementPrefix("normal");
qreal left, top, right, bottom;
background->getMargins(left, top, right, bottom);
background->setElementPrefix("active");
qreal activeLeft, activeTop, activeRight, activeBottom;
background->getMargins(activeLeft, activeTop, activeRight, activeBottom);
activeRect = QRectF(QPointF(0, 0), q->size());
activeRect.adjust(left - activeLeft, top - activeTop,
-(right - activeRight), -(bottom - activeBottom));
background->setElementPrefix("normal");
}
void ComboBoxPrivate::syncBorders()
{
//set margins from the normal element
qreal left, top, right, bottom;
background->setElementPrefix("normal");
background->getMargins(left, top, right, bottom);
q->setContentsMargins(left, top, right, bottom);
//calc the rect for the over effect
syncActiveRect();
KComboBox *native = q->nativeWidget();
if (customFont) {
native->setFont(Theme::defaultTheme()->font(Theme::DefaultFont));
} else {
native->setFont(q->font());
}
}
void ComboBoxPrivate::animationUpdate(qreal progress)
{
if (progress == 1) {
animId = -1;
fadeIn = true;
}
opacity = fadeIn ? progress : 1 - progress;
// explicit update
q->update();
}
void ComboBoxPrivate::animationFinished(int id)
{
if (id == animId) {
animId = -1;
}
}
ComboBox::ComboBox(QGraphicsWidget *parent)
: QGraphicsProxyWidget(parent),
d(new ComboBoxPrivate(this))
{
d->background = new FrameSvg(this);
d->background->setImagePath("widgets/button");
d->background->setCacheAllRenderedFrames(true);
d->background->setElementPrefix("normal");
d->lineEditBackground = new FrameSvg(this);
d->lineEditBackground->setImagePath("widgets/lineedit");
d->lineEditBackground->setCacheAllRenderedFrames(true);
setAcceptHoverEvents(true);
d->style = Style::sharedStyle();
setNativeWidget(new KComboBox);
connect(Theme::defaultTheme(), SIGNAL(themeChanged()), SLOT(syncBorders()));
connect(Plasma::Animator::self(), SIGNAL(customAnimationFinished(int)), this, SLOT(animationFinished(int)));
}
ComboBox::~ComboBox()
{
delete d;
Style::doneWithSharedStyle();
}
QString ComboBox::text() const
{
return static_cast<KComboBox*>(widget())->currentText();
}
void ComboBox::setStyleSheet(const QString &stylesheet)
{
widget()->setStyleSheet(stylesheet);
}
QString ComboBox::styleSheet()
{
return widget()->styleSheet();
}
void ComboBox::setNativeWidget(KComboBox *nativeWidget)
{
if (widget()) {
widget()->deleteLater();
}
connect(nativeWidget, SIGNAL(activated(const QString &)), this, SIGNAL(activated(const QString &)));
connect(nativeWidget, SIGNAL(currentIndexChanged(const QString &)),
this, SIGNAL(textChanged(const QString &)));
setWidget(nativeWidget);
nativeWidget->setAttribute(Qt::WA_NoSystemBackground);
nativeWidget->setStyle(d->style.data());
d->syncBorders();
}
KComboBox *ComboBox::nativeWidget() const
{
return static_cast<KComboBox*>(widget());
}
void ComboBox::addItem(const QString &text)
{
static_cast<KComboBox*>(widget())->addItem(text);
}
void ComboBox::clear()
{
static_cast<KComboBox*>(widget())->clear();
}
void ComboBox::resizeEvent(QGraphicsSceneResizeEvent *event)
{
if (d->background) {
//resize needed panels
d->syncActiveRect();
d->background->setElementPrefix("focus");
d->background->resizeFrame(size());
d->background->setElementPrefix("active");
d->background->resizeFrame(d->activeRect.size());
d->background->setElementPrefix("normal");
d->background->resizeFrame(size());
}
QGraphicsProxyWidget::resizeEvent(event);
}
void ComboBox::paint(QPainter *painter,
const QStyleOptionGraphicsItem *option,
QWidget *widget)
{
if (!styleSheet().isNull() ||
Theme::defaultTheme()->useNativeWidgetStyle()) {
QGraphicsProxyWidget::paint(painter, option, widget);
return;
}
if (nativeWidget()->isEditable()) {
if (d->animId != -1 || hasFocus() || d->underMouse) {
if (hasFocus()) {
d->lineEditBackground->setElementPrefix("focus");
} else {
d->lineEditBackground->setElementPrefix("hover");
}
qreal left, top, right, bottom;
d->lineEditBackground->getMargins(left, top, right, bottom);
d->lineEditBackground->resizeFrame(size()+QSizeF(left+right, top+bottom));
if (qFuzzyCompare(d->opacity, (qreal)1.0)) {
d->lineEditBackground->paintFrame(painter, QPoint(-left, -top));
} else {
QPixmap bufferPixmap = d->lineEditBackground->framePixmap();
QPainter buffPainter(&bufferPixmap);
buffPainter.setCompositionMode(QPainter::CompositionMode_DestinationIn);
buffPainter.fillRect(bufferPixmap.rect(), QColor(0, 0, 0, 256*d->opacity));
buffPainter.end();
painter->drawPixmap(bufferPixmap.rect().translated(QPoint(-left, -top)), bufferPixmap, bufferPixmap.rect());
}
}
QGraphicsProxyWidget::paint(painter, option, widget);
return;
}
QPixmap bufferPixmap;
//normal button
if (isEnabled()) {
d->background->setElementPrefix("normal");
if (d->animId == -1) {
d->background->paintFrame(painter);
}
//disabled widget
} else {
bufferPixmap = QPixmap(rect().size().toSize());
bufferPixmap.fill(Qt::transparent);
QPainter buffPainter(&bufferPixmap);
d->background->paintFrame(&buffPainter);
buffPainter.setCompositionMode(QPainter::CompositionMode_DestinationIn);
buffPainter.fillRect(bufferPixmap.rect(), QColor(0, 0, 0, 128));
painter->drawPixmap(0, 0, bufferPixmap);
}
//if is under mouse draw the animated glow overlay
if (isEnabled() && acceptHoverEvents()) {
if (d->animId != -1) {
d->background->setElementPrefix("normal");
QPixmap normalPix = d->background->framePixmap();
d->background->setElementPrefix("active");
painter->drawPixmap(
d->activeRect.topLeft(),
PaintUtils::transition(d->background->framePixmap(), normalPix, 1 - d->opacity));
} else if (isUnderMouse()) {
d->background->setElementPrefix("active");
d->background->paintFrame(painter, d->activeRect.topLeft());
}
}
if (nativeWidget()->hasFocus()) {
d->background->setElementPrefix("focus");
d->background->paintFrame(painter);
}
painter->setPen(Theme::defaultTheme()->color(Theme::ButtonTextColor));
QStyleOptionComboBox comboOpt;
comboOpt.initFrom(nativeWidget());
comboOpt.palette.setColor(
QPalette::ButtonText, Theme::defaultTheme()->color(Theme::ButtonTextColor));
comboOpt.currentIcon = nativeWidget()->itemIcon(
nativeWidget()->currentIndex());
comboOpt.currentText = nativeWidget()->itemText(
nativeWidget()->currentIndex());
comboOpt.editable = false;
nativeWidget()->style()->drawControl(
QStyle::CE_ComboBoxLabel, &comboOpt, painter, nativeWidget());
comboOpt.rect = nativeWidget()->style()->subControlRect(
QStyle::CC_ComboBox, &comboOpt, QStyle::SC_ComboBoxArrow, nativeWidget());
nativeWidget()->style()->drawPrimitive(
QStyle::PE_IndicatorArrowDown, &comboOpt, painter, nativeWidget());
}
void ComboBox::focusInEvent(QFocusEvent *event)
{
if (nativeWidget()->isEditable() && !d->underMouse) {
const int FadeInDuration = 75;
if (d->animId != -1) {
Animator::self()->stopCustomAnimation(d->animId);
}
d->animId = Animator::self()->customAnimation(
40 / (1000 / FadeInDuration), FadeInDuration,
Animator::LinearCurve, this, "animationUpdate");
}
QGraphicsProxyWidget::focusInEvent(event);
}
void ComboBox::focusOutEvent(QFocusEvent *event)
{
if (nativeWidget()->isEditable() && !d->underMouse) {
const int FadeOutDuration = 150;
if (d->animId != -1) {
Animator::self()->stopCustomAnimation(d->animId != -1);
}
d->fadeIn = false;
d->animId = Animator::self()->customAnimation(
40 / (1000 / FadeOutDuration),
FadeOutDuration, Animator::LinearCurve, this, "animationUpdate");
}
QGraphicsProxyWidget::focusInEvent(event);
}
void ComboBox::hoverEnterEvent(QGraphicsSceneHoverEvent *event)
{
d->underMouse = true;
if (nativeWidget()->isEditable() && hasFocus()) {
return;
}
const int FadeInDuration = 75;
if (d->animId != -1) {
Animator::self()->stopCustomAnimation(d->animId);
}
d->animId = Animator::self()->customAnimation(
40 / (1000 / FadeInDuration), FadeInDuration,
Animator::LinearCurve, this, "animationUpdate");
d->background->setElementPrefix("active");
QGraphicsProxyWidget::hoverEnterEvent(event);
}
void ComboBox::hoverLeaveEvent(QGraphicsSceneHoverEvent *event)
{
d->underMouse = false;
if (nativeWidget()->isEditable() && hasFocus()) {
return;
}
const int FadeOutDuration = 150;
if (d->animId != -1) {
Animator::self()->stopCustomAnimation(d->animId != -1);
}
d->fadeIn = false;
d->animId = Animator::self()->customAnimation(
40 / (1000 / FadeOutDuration),
FadeOutDuration, Animator::LinearCurve, this, "animationUpdate");
d->background->setElementPrefix("active");
QGraphicsProxyWidget::hoverLeaveEvent(event);
}
void ComboBox::changeEvent(QEvent *event)
{
if (event->type() == QEvent::FontChange) {
d->customFont = true;
nativeWidget()->setFont(font());
}
QGraphicsProxyWidget::changeEvent(event);
}
} // namespace Plasma
#include <combobox.moc>