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plasma-framework/widgets/iconwidget.cpp
Kevin Ottens f66b4d819b API changes as announced: 
* ConfigXml becomes ConfigLoader
  * Containment::(add|remove)ToolBoxTool(QAction *action) becomes
    Containment::(add|remove)ToolBoxAction(QAction *action)
  * Flash becomes FlashingLabel
  * Icon becomes IconWidget
  * PanelSvg becomes FrameSvg

svn path=/trunk/KDE/kdebase/workspace/libs/plasma/; revision=877504
2008-10-29 17:46:33 +00:00

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/*
* Copyright 2007 by Aaron Seigo <aseigo@kde.org>
* Copyright 2007 by Riccardo Iaconelli <riccardo@kde.org>
* Copyright 2007 by Matt Broadstone <mbroadst@gmail.com>
* Copyright 2006-2007 Fredrik Höglund <fredrik@kde.org>
* Copyright 2007 by Marco Martin <notmart@gmail.com>
* Copyright 2008 by Alexis Ménard <darktears31@gmail.com>
*
* 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 "iconwidget.h"
#include "iconwidget_p.h"
#include <QAction>
#include <QApplication>
#include <QPainter>
#include <QGraphicsSceneMouseEvent>
#include <QGraphicsView>
#include <QStyleOptionGraphicsItem>
#include <QTextLayout>
//#define BACKINGSTORE_BLUR_HACK
#ifdef BACKINGSTORE_BLUR_HACK
#include <private/qwindowsurface_p.h>
#include "effects/blur.cpp"
#endif
#include <KGlobalSettings>
#include <KIconEffect>
#include <KIconLoader>
#include <KIcon>
#include <KUrl>
#include <KRun>
#include <KMimeType>
#include <KDebug>
#include <KColorScheme>
#include <plasma/paintutils.h>
#include <plasma/theme.h>
#include "animator.h"
#include "svg.h"
namespace Plasma
{
IconWidgetPrivate::IconWidgetPrivate(IconWidget *i)
: q(i),
iconSvg(0),
m_fadeIn(false),
m_hoverAnimId(-1),
m_hoverAlpha(20 / 255),
iconSize(48, 48),
states(IconWidgetPrivate::NoState),
orientation(Qt::Vertical),
numDisplayLines(2),
invertLayout(false),
drawBg(false),
action(0),
activeMargins(0)
{
}
IconWidgetPrivate::~IconWidgetPrivate()
{
qDeleteAll(cornerActions);
}
void IconWidget::readColors()
{
d->textColor = Plasma::Theme::defaultTheme()->color(Theme::TextColor);
d->shadowColor = Plasma::Theme::defaultTheme()->color(Theme::BackgroundColor);
}
IconAction::IconAction(IconWidget *icon, QAction *action)
: m_icon(icon),
m_action(action),
m_hovered(false),
m_pressed(false),
m_selected(false),
m_visible(false),
m_animationId(-1)
{
}
void IconAction::show()
{
if (m_animationId) {
Animator::self()->stopElementAnimation(m_animationId);
}
rebuildPixmap();
m_animationId = Animator::self()->animateElement(m_icon, Animator::AppearAnimation);
Animator::self()->setInitialPixmap(m_animationId, m_pixmap);
m_visible = true;
}
void IconAction::hide()
{
if (m_animationId) {
Animator::self()->stopElementAnimation(m_animationId);
}
rebuildPixmap();
m_animationId = Animator::self()->animateElement(m_icon, Animator::DisappearAnimation);
Animator::self()->setInitialPixmap(m_animationId, m_pixmap);
m_visible = false;
}
bool IconAction::isVisible() const
{
return m_visible;
}
bool IconAction::isPressed() const
{
return m_pressed;
}
bool IconAction::isHovered() const
{
return m_hovered;
}
void IconAction::setSelected(bool selected)
{
m_selected = selected;
}
bool IconAction::isSelected() const
{
return m_selected;
}
void IconAction::setRect(const QRectF &rect)
{
m_rect = rect;
}
QRectF IconAction::rect() const
{
return m_rect;
}
void IconAction::rebuildPixmap()
{
// Determine proper QIcon mode based on selection status
QIcon::Mode mode = QIcon::Normal;
if (m_selected) {
mode = QIcon::Selected;
}
// Draw everything
m_pixmap = QPixmap(26, 26);
m_pixmap.fill(Qt::transparent);
int element = IconWidgetPrivate::Minibutton;
if (m_pressed) {
element = IconWidgetPrivate::MinibuttonPressed;
} else if (m_hovered) {
element = IconWidgetPrivate::MinibuttonHover;
}
QPainter painter(&m_pixmap);
m_icon->drawActionButtonBase(&painter, m_pixmap.size(), element);
m_action->icon().paint(&painter, 2, 2, 22, 22, Qt::AlignCenter, mode);
}
bool IconAction::event(QEvent::Type type, const QPointF &pos)
{
if (m_icon->size().width() < m_rect.width() * 2.0 ||
m_icon->size().height() < m_rect.height() * 2.0) {
return false;
}
switch (type) {
case QEvent::GraphicsSceneMousePress:
{
setSelected(m_rect.contains(pos));
return isSelected();
}
break;
case QEvent::GraphicsSceneMouseMove:
{
bool wasSelected = isSelected();
bool active = m_rect.contains(pos);
setSelected(wasSelected && active);
return (wasSelected != isSelected()) || active;
}
break;
case QEvent::GraphicsSceneMouseRelease:
{
// kDebug() << "IconAction::event got a QEvent::MouseButtonRelease, " << isSelected();
bool wasSelected = isSelected();
setSelected(false);
if (wasSelected) {
m_action->trigger();
}
return wasSelected;
}
break;
case QEvent::GraphicsSceneHoverEnter:
m_pressed = false;
m_hovered = true;
break;
case QEvent::GraphicsSceneHoverLeave:
m_pressed = false;
m_hovered = false;
break;
default:
break;
}
return false;
}
int IconAction::animationId() const
{
return m_animationId;
}
QAction *IconAction::action() const
{
return m_action;
}
void IconAction::paint(QPainter *painter) const
{
if (m_icon->size().width() < m_rect.width() * 2.0 ||
m_icon->size().height() < m_rect.height() * 2.0) {
return;
}
QPixmap animPixmap = Animator::self()->currentPixmap(m_animationId);
if (m_visible && animPixmap.isNull()) {
painter->drawPixmap(m_rect.toRect(), m_pixmap);
} else {
painter->drawPixmap(m_rect.toRect(), animPixmap);
}
}
IconWidget::IconWidget(QGraphicsItem *parent)
: QGraphicsWidget(parent),
d(new IconWidgetPrivate(this))
{
init();
}
IconWidget::IconWidget(const QString &text, QGraphicsItem *parent)
: QGraphicsWidget(parent),
d(new IconWidgetPrivate(this))
{
init();
setText(text);
}
IconWidget::IconWidget(const QIcon &icon, const QString &text, QGraphicsItem *parent)
: QGraphicsWidget(parent),
d(new IconWidgetPrivate(this))
{
init();
setText(text);
setIcon(icon);
}
IconWidget::~IconWidget()
{
delete d;
}
void IconWidget::init()
{
readColors();
connect(Plasma::Theme::defaultTheme(), SIGNAL(themeChanged()), SLOT(readColors()));
// setAcceptedMouseButtons(Qt::LeftButton);
setAcceptsHoverEvents(true);
int focusHMargin = QApplication::style()->pixelMetric(QStyle::PM_FocusFrameHMargin);
int focusVMargin = QApplication::style()->pixelMetric(QStyle::PM_FocusFrameVMargin);
// Margins for horizontal mode (list views, tree views, table views)
d->setHorizontalMargin(IconWidgetPrivate::TextMargin, focusHMargin, focusVMargin);
d->setHorizontalMargin(IconWidgetPrivate::IconMargin, focusHMargin, focusVMargin);
d->setHorizontalMargin(IconWidgetPrivate::ItemMargin, 0, 0);
// Margins for vertical mode (icon views)
d->setVerticalMargin(IconWidgetPrivate::TextMargin, 6, 2);
d->setVerticalMargin(IconWidgetPrivate::IconMargin, focusHMargin, focusVMargin);
d->setVerticalMargin(IconWidgetPrivate::ItemMargin, 0, 0);
d->setActiveMargins();
d->currentSize = QSizeF(-1, -1);
//setDrawStandardBackground(false);
}
void IconWidget::addIconAction(QAction *action)
{
int count = d->cornerActions.count();
if (count > 3) {
kDebug() << "no more room for more actions!";
}
IconAction *iconAction = new IconAction(this, action);
d->cornerActions.append(iconAction);
connect(action, SIGNAL(destroyed(QObject*)), this, SLOT(actionDestroyed(QObject*)));
iconAction->setRect(d->actionRect((IconWidgetPrivate::ActionPosition)count));
}
void IconWidget::setAction(QAction *action)
{
if (d->action) {
disconnect(d->action, 0, this, 0);
disconnect(this, 0, d->action, 0);
}
d->action = action;
if (action) {
connect(action, SIGNAL(changed()), this, SLOT(syncToAction()));
connect(this, SIGNAL(clicked()), action, SLOT(trigger()));
d->syncToAction();
}
}
QAction *IconWidget::action() const
{
return d->action;
}
void IconWidget::actionDestroyed(QObject *action)
{
QList<IconAction*>::iterator it = d->cornerActions.begin();
while (it != d->cornerActions.end()) {
if ((*it)->action() == action) {
d->cornerActions.erase(it);
break;
}
}
update(); // redraw since an action has been deleted.
}
int IconWidget::numDisplayLines()
{
return d->numDisplayLines;
}
void IconWidget::setNumDisplayLines(int numLines)
{
if(numLines > d->maxDisplayLines) {
d->numDisplayLines = d->maxDisplayLines;
} else {
d->numDisplayLines = numLines;
}
}
void IconWidget::setDrawBackground(bool draw)
{
if (d->drawBg != draw) {
d->drawBg = draw;
update();
}
}
bool IconWidget::drawBackground() const
{
return d->drawBg;
}
QPainterPath IconWidget::shape() const
{
if (d->currentSize.width() < 1) {
return QGraphicsItem::shape();
}
return PaintUtils::roundedRectangle(
QRectF(QPointF(0.0, 0.0), d->currentSize).adjusted(-2, -2, 2, 2), 10.0);
}
QSizeF IconWidgetPrivate::displaySizeHint(const QStyleOptionGraphicsItem *option, const qreal width) const
{
if (text.isEmpty() && infoText.isEmpty()) {
return QSizeF(.0, .0);
}
QString label = text;
// const qreal maxWidth = (orientation == Qt::Vertical) ? iconSize.width() + 10 : 32757;
// NOTE: find a way to use the other layoutText, it currently returns nominal width, when
// we actually need the actual width.
qreal textWidth = width -
horizontalMargin[IconWidgetPrivate::TextMargin].left -
horizontalMargin[IconWidgetPrivate::TextMargin].right;
//allow only five lines of text
const qreal maxHeight =
numDisplayLines * Plasma::Theme::defaultTheme()->fontMetrics().lineSpacing();
// To compute the nominal size for the label + info, we'll just append
// the information string to the label
if (!infoText.isEmpty()) {
label += QString(QChar::LineSeparator) + infoText;
}
QTextLayout layout;
setLayoutOptions(layout, option);
QSizeF size = layoutText(layout, option, label, QSizeF(textWidth, maxHeight));
return addMargin(size, TextMargin);
}
void IconWidget::layoutIcons(const QStyleOptionGraphicsItem *option)
{
if (size() == d->currentSize) {
return;
}
d->currentSize = size();
d->setActiveMargins();
//calculate icon size based on the available space
qreal iconWidth;
if (d->orientation == Qt::Vertical) {
qreal heightAvail;
//if there is text resize the icon in order to make room for the text
if (!d->text.isEmpty() || !d->infoText.isEmpty()) {
heightAvail = d->currentSize.height() -
d->displaySizeHint(option, d->currentSize.width()).height() -
d->verticalMargin[IconWidgetPrivate::TextMargin].top -
d->verticalMargin[IconWidgetPrivate::TextMargin].bottom;
//never make a label higher than half the total height
heightAvail = qMax(heightAvail, d->currentSize.height() / 2);
} else {
heightAvail = d->currentSize.height();
}
//aspect ratio very "tall"
if (d->currentSize.width() < heightAvail) {
iconWidth = d->currentSize.width() -
d->horizontalMargin[IconWidgetPrivate::IconMargin].left -
d->horizontalMargin[IconWidgetPrivate::IconMargin].right;
} else {
iconWidth = heightAvail -
d->verticalMargin[IconWidgetPrivate::IconMargin].top -
d->verticalMargin[IconWidgetPrivate::IconMargin].bottom;
}
} else {
//Horizontal layout
QFontMetricsF fm(font());
//if there is text resize the icon in order to make room for the text
if (d->text.isEmpty() && d->infoText.isEmpty()) {
// with no text, we just take up the whole geometry
iconWidth = d->currentSize.width() -
d->horizontalMargin[IconWidgetPrivate::IconMargin].left -
d->horizontalMargin[IconWidgetPrivate::IconMargin].right;
} else {
iconWidth = d->currentSize.height() -
d->verticalMargin[IconWidgetPrivate::IconMargin].top -
d->verticalMargin[IconWidgetPrivate::IconMargin].bottom;
}
}
d->iconSize = QSizeF(iconWidth, iconWidth);
int count = 0;
foreach (IconAction *iconAction, d->cornerActions) {
iconAction->setRect(d->actionRect((IconWidgetPrivate::ActionPosition)count));
++count;
}
}
void IconWidget::setSvg(const QString &svgFilePath, const QString &elementId)
{
if (!d->iconSvg) {
d->iconSvg = new Plasma::Svg(this);
}
d->iconSvg->setImagePath(svgFilePath);
d->iconSvg->setContainsMultipleImages(!elementId.isNull());
d->iconSvgElement = elementId;
}
void IconWidget::hoverEffect(bool show)
{
if (show) {
d->states |= IconWidgetPrivate::HoverState;
}
d->m_fadeIn = show;
const int FadeInDuration = 150;
if (d->m_hoverAnimId != -1) {
Animator::self()->stopCustomAnimation(d->m_hoverAnimId);
}
d->m_hoverAnimId = Animator::self()->customAnimation(
40 / (1000 / FadeInDuration), FadeInDuration,
Animator::EaseOutCurve, this, "hoverAnimationUpdate");
}
void IconWidget::hoverAnimationUpdate(qreal progress)
{
if (d->m_fadeIn) {
d->m_hoverAlpha = progress;
} else {
// If we mouse leaves before the fade in is done, fade out from where we were,
// not from fully faded in
d->m_hoverAlpha = qMin(1 - progress, d->m_hoverAlpha);
}
if (qFuzzyCompare(qreal(1.0), progress)) {
d->m_hoverAnimId = -1;
if (!d->m_fadeIn) {
d->states &= ~IconWidgetPrivate::HoverState;
}
}
update();
}
void IconWidgetPrivate::drawBackground(QPainter *painter, IconWidgetState state)
{
if (!drawBg) {
return;
}
bool darkShadow = shadowColor.value() < 128;
QColor shadow = shadowColor;
QColor border = textColor;
switch (state) {
case IconWidgetPrivate::HoverState:
shadow.setHsv(
shadow.hue(),
shadow.saturation(),
shadow.value() + (int)(darkShadow ? 50 * m_hoverAlpha: -50 * m_hoverAlpha),
200 + (int)m_hoverAlpha * 55); // opacity
break;
case IconWidgetPrivate::PressedState:
shadow.setHsv(
shadow.hue(),
shadow.saturation(),
shadow.value() + (darkShadow ?
(int)(50 * m_hoverAlpha) : (int)(-50 * m_hoverAlpha)),
204); //80% opacity
break;
default:
break;
}
border.setAlphaF(0.3 * m_hoverAlpha);
shadow.setAlphaF(0.6 * m_hoverAlpha);
painter->save();
painter->translate(0.5, 0.5);
painter->setRenderHint(QPainter::Antialiasing);
painter->setBrush(shadow);
painter->setPen(QPen(border, 1));
painter->drawPath(
PaintUtils::roundedRectangle(
QRectF(QPointF(1, 1), QSize((int)currentSize.width() - 2,
(int)currentSize.height() - 2)),
5.0));
painter->restore();
}
QPixmap IconWidgetPrivate::decoration(const QStyleOptionGraphicsItem *option, bool useHoverEffect)
{
QPixmap result;
QIcon::Mode mode = option->state & QStyle::State_Enabled ? QIcon::Normal : QIcon::Disabled;
QIcon::State state = option->state & QStyle::State_Open ? QIcon::On : QIcon::Off;
if (iconSvg) {
if (iconSvgPixmap.size() != iconSize.toSize()) {
QImage img(iconSize.toSize(), QImage::Format_ARGB32_Premultiplied);
{
img.fill(0);
QPainter p(&img);
iconSvg->resize(iconSize);
iconSvg->paint(&p, img.rect(), iconSvgElement);
}
iconSvgPixmap = QPixmap::fromImage(img);
}
result = iconSvgPixmap;
} else {
const QSize size = icon.actualSize(iconSize.toSize(), mode, state);
result = icon.pixmap(size, mode, state);
}
// We disable the iconeffect here since we cannot get it into sync with
// the fade animation. TODO: Enable it when animations are switched off
if (!result.isNull() && useHoverEffect) {
KIconEffect *effect = KIconLoader::global()->iconEffect();
// Note that in KIconLoader terminology, active = hover.
// We're assuming that the icon group is desktop/filemanager, since this
// is KFileItemDelegate.
if (effect->hasEffect(KIconLoader::Desktop, KIconLoader::ActiveState)) {
if (qFuzzyCompare(qreal(1.0), m_hoverAlpha)) {
result = effect->apply(result, KIconLoader::Desktop, KIconLoader::ActiveState);
} else {
result = PaintUtils::transition(
result,
effect->apply(result, KIconLoader::Desktop,
KIconLoader::ActiveState), m_hoverAlpha);
}
}
}
return result;
}
QPointF IconWidgetPrivate::iconPosition(const QStyleOptionGraphicsItem *option,
const QPixmap &pixmap) const
{
const QRectF itemRect = subtractMargin(option->rect, IconWidgetPrivate::ItemMargin);
// Compute the nominal decoration rectangle
const QSizeF size = addMargin(iconSize, IconWidgetPrivate::IconMargin);
Qt::LayoutDirection direction = iconDirection(option);
//alignment depends from orientation and option->direction
Qt::Alignment alignment;
if (text.isEmpty() && infoText.isEmpty()) {
alignment = Qt::AlignCenter;
} else if (orientation == Qt::Vertical) {
alignment = Qt::Alignment(Qt::AlignHCenter | Qt::AlignTop);
//Horizontal
} else {
alignment = QStyle::visualAlignment(
direction, Qt::Alignment(Qt::AlignLeft | Qt::AlignVCenter));
}
const QRect iconRect =
QStyle::alignedRect(direction, alignment, size.toSize(), itemRect.toRect());
// Position the pixmap in the center of the rectangle
QRect pixmapRect = pixmap.rect();
pixmapRect.moveCenter(iconRect.center());
// add a gimmicky margin of 5px to y, TEMP TEMP TEMP
// pixmapRect = pixmapRect.adjusted(0, 5, 0, 0);
return QPointF(pixmapRect.topLeft());
}
QRectF IconWidgetPrivate::labelRectangle(const QStyleOptionGraphicsItem *option,
const QPixmap &icon,
const QString &string) const
{
Q_UNUSED(string)
if (icon.isNull()) {
return option->rect;
}
const QSizeF decoSize = addMargin(iconSize, IconWidgetPrivate::IconMargin);
const QRectF itemRect = subtractMargin(option->rect, IconWidgetPrivate::ItemMargin);
QRectF textArea(QPointF(0, 0), itemRect.size());
if (orientation == Qt::Vertical) {
textArea.setTop(decoSize.height() + 1);
} else {
//Horizontal
textArea.setLeft(decoSize.width() + 1);
}
textArea.translate(itemRect.topLeft());
return QRectF(QStyle::visualRect(iconDirection(option), option->rect, textArea.toRect()));
}
// Lays the text out in a rectangle no larger than constraints, eliding it as necessary
QSizeF IconWidgetPrivate::layoutText(QTextLayout &layout, const QStyleOptionGraphicsItem *option,
const QString &text, const QSizeF &constraints) const
{
const QSizeF size = layoutText(layout, text, constraints.width());
if (size.width() > constraints.width() || size.height() > constraints.height()) {
const QString elided = elidedText(layout, option, constraints);
return layoutText(layout, elided, constraints.width());
}
return size;
}
// Lays the text out in a rectangle no wider than maxWidth
QSizeF IconWidgetPrivate::layoutText(QTextLayout &layout, const QString &text, qreal maxWidth) const
{
QFontMetricsF metrics(layout.font());
qreal leading = metrics.leading();
qreal height = 0.0;
qreal widthUsed = 0.0;
QTextLine line;
layout.setText(text);
layout.beginLayout();
while ((line = layout.createLine()).isValid()) {
line.setLineWidth(maxWidth);
height += leading;
line.setPosition(QPointF(0.0, height));
height += line.height();
widthUsed = qMax(widthUsed, line.naturalTextWidth());
}
layout.endLayout();
return QSizeF(widthUsed, height);
}
// Elides the text in the layout, by iterating over each line in the layout, eliding
// or word breaking the line if it's wider than the max width, and finally adding an
// ellipses at the end of the last line, if there are more lines than will fit within
// the vertical size constraints.
QString IconWidgetPrivate::elidedText(QTextLayout &layout, const QStyleOptionGraphicsItem *option,
const QSizeF &size) const
{
Q_UNUSED(option)
QFontMetricsF metrics(layout.font());
const QString text = layout.text();
qreal maxWidth = size.width();
qreal maxHeight = size.height();
qreal height = 0;
// Elide each line that has already been laid out in the layout.
QString elided;
elided.reserve(text.length());
for (int i = 0; i < layout.lineCount(); i++) {
QTextLine line = layout.lineAt(i);
int start = line.textStart();
int length = line.textLength();
height += metrics.leading();
if (height + line.height() + metrics.lineSpacing() > maxHeight) {
// Unfortunately, if the line ends because of a line separator,
// elidedText() will be too clever and keep adding lines until
// it finds one that's too wide.
if (line.naturalTextWidth() < maxWidth &&
start + length > 0 &&
text[start + length - 1] == QChar::LineSeparator) {
elided += text.mid(start, length - 1);
} else {
elided += metrics.elidedText(text.mid(start), Qt::ElideRight, maxWidth);
}
break;
} else if (line.naturalTextWidth() > maxWidth) {
elided += metrics.elidedText(text.mid(start, length), Qt::ElideRight, maxWidth);
} else {
elided += text.mid(start, length);
}
height += line.height();
}
return elided;
}
void IconWidgetPrivate::layoutTextItems(const QStyleOptionGraphicsItem *option,
const QPixmap &icon, QTextLayout *labelLayout,
QTextLayout *infoLayout, QRectF *textBoundingRect) const
{
bool showInformation = false;
setLayoutOptions(*labelLayout, option);
QFontMetricsF fm(labelLayout->font());
const QRectF textArea = labelRectangle(option, icon, text);
QRectF textRect = subtractMargin(textArea, IconWidgetPrivate::TextMargin);
//kDebug() << this << "text area" << textArea << "text rect" << textRect;
// Sizes and constraints for the different text parts
QSizeF maxLabelSize = textRect.size();
QSizeF maxInfoSize = textRect.size();
QSizeF labelSize;
QSizeF infoSize;
// If we have additional info text, and there's space for at least two lines of text,
// adjust the max label size to make room for at least one line of the info text
if (!infoText.isEmpty() && textRect.height() >= fm.lineSpacing() * 2) {
infoLayout->setFont(labelLayout->font());
infoLayout->setTextOption(labelLayout->textOption());
maxLabelSize.rheight() -= fm.lineSpacing();
showInformation = true;
}
// Lay out the label text, and adjust the max info size based on the label size
labelSize = layoutText(*labelLayout, option, text, maxLabelSize);
maxInfoSize.rheight() -= labelSize.height();
// Lay out the info text
if (showInformation) {
infoSize = layoutText(*infoLayout, option, infoText, maxInfoSize);
} else {
infoSize = QSizeF(0, 0);
}
// Compute the bounding rect of the text
const Qt::Alignment alignment = labelLayout->textOption().alignment();
const QSizeF size(qMax(labelSize.width(), infoSize.width()),
labelSize.height() + infoSize.height());
*textBoundingRect =
QStyle::alignedRect(iconDirection(option), alignment, size.toSize(), textRect.toRect());
// Compute the positions where we should draw the layouts
labelLayout->setPosition(QPointF(textRect.x(), textBoundingRect->y()));
infoLayout->setPosition(QPointF(textRect.x(), textBoundingRect->y() + labelSize.height()));
//kDebug() << "final position is" << labelLayout->position();
}
QBrush IconWidgetPrivate::foregroundBrush(const QStyleOptionGraphicsItem *option) const
{
const QPalette::ColorGroup group = option->state & QStyle::State_Enabled ?
QPalette::Normal : QPalette::Disabled;
// Always use the highlight color for selected items
if (option->state & QStyle::State_Selected) {
return option->palette.brush(group, QPalette::HighlightedText);
}
return option->palette.brush(group, QPalette::Text);
}
QBrush IconWidgetPrivate::backgroundBrush(const QStyleOptionGraphicsItem *option) const
{
const QPalette::ColorGroup group = option->state & QStyle::State_Enabled ?
QPalette::Normal : QPalette::Disabled;
QBrush background(Qt::NoBrush);
// Always use the highlight color for selected items
if (option->state & QStyle::State_Selected) {
background = option->palette.brush(group, QPalette::Highlight);
}
return background;
}
void IconWidgetPrivate::drawTextItems(QPainter *painter,
const QStyleOptionGraphicsItem *option,
const QTextLayout &labelLayout,
const QTextLayout &infoLayout) const
{
Q_UNUSED(option)
painter->save();
painter->setPen(textColor);
// the translation prevents odd rounding errors in labelLayout.position()
// when applied to the canvas
painter->translate(0.5, 0.5);
labelLayout.draw(painter, QPointF());
if (!infoLayout.text().isEmpty()) {
painter->setPen(textColor);
infoLayout.draw(painter, QPointF());
}
painter->restore();
}
void IconWidget::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget)
{
Q_UNUSED(widget);
#ifdef BACKINGSTORE_BLUR_HACK
if (d->state == IconWidgetPrivate::HoverState && scene()) {
QList<QGraphicsView*> views = scene()->views();
if (views.count() > 0) {
QPixmap* pix = static_cast<QPixmap*>(views[0]->windowSurface()->paintDevice());
QImage image(boundingRect().size().toSize(), QImage::Format_ARGB32_Premultiplied);
{
QPainter p(&image);
p.drawPixmap(image.rect(), *pix, sceneBoundingRect());
}
expblur<16,7>(image, 8);
painter->drawImage(0, 0, image);
}
}
#endif
//Lay out the main icon and action icons
layoutIcons(option);
// Compute the metrics, and lay out the text items
// ========================================================================
IconWidgetPrivate::IconWidgetState state = IconWidgetPrivate::NoState;
if (d->states & IconWidgetPrivate::ManualPressedState) {
state = IconWidgetPrivate::PressedState;
} else if (d->states & IconWidgetPrivate::PressedState) {
if (d->states & IconWidgetPrivate::HoverState) {
state = IconWidgetPrivate::PressedState;
}
} else if (d->states & IconWidgetPrivate::HoverState) {
state = IconWidgetPrivate::HoverState;
}
QPixmap icon = d->decoration(option, state != IconWidgetPrivate::NoState);
const QPointF iconPos = d->iconPosition(option, icon);
d->drawBackground(painter, state);
// draw icon
if (!icon.isNull()) {
painter->drawPixmap(iconPos, icon);
}
// Draw corner actions
foreach (const IconAction *action, d->cornerActions) {
if (action->animationId()) {
action->paint(painter);
}
}
// Draw text last because its overlayed
QTextLayout labelLayout, infoLayout;
QRectF textBoundingRect;
d->layoutTextItems(option, icon, &labelLayout, &infoLayout, &textBoundingRect);
QImage shadow(textBoundingRect.size().toSize() + QSize(4, 4),
QImage::Format_ARGB32_Premultiplied);
shadow.fill(Qt::transparent);
{
QPainter buffPainter(&shadow);
buffPainter.translate(-textBoundingRect.x(), -textBoundingRect.y());
d->drawTextItems(&buffPainter, option, labelLayout, infoLayout);
}
QPoint shadowOffset = QPoint(1, 2);
if (d->shadowColor.value() > 128) {
shadowOffset = QPoint(0, 1);
}
PaintUtils::shadowBlur(shadow, 2, d->shadowColor);
painter->drawImage(textBoundingRect.topLeft() + shadowOffset, shadow);
d->drawTextItems(painter, option, labelLayout, infoLayout);
}
void IconWidget::drawActionButtonBase(QPainter *painter, const QSize &size, int element)
{
qreal radius = size.width() / 2;
QRadialGradient gradient(radius, radius, radius, radius, radius);
int alpha;
if (element == IconWidgetPrivate::MinibuttonPressed) {
alpha = 255;
} else if (element == IconWidgetPrivate::MinibuttonHover) {
alpha = 200;
} else {
alpha = 160;
}
gradient.setColorAt(0, QColor::fromRgb(d->textColor.red(),
d->textColor.green(),
d->textColor.blue(), alpha));
gradient.setColorAt(1, QColor::fromRgb(d->textColor.red(),
d->textColor.green(),
d->textColor.blue(), 0));
painter->setBrush(gradient);
painter->setPen(Qt::NoPen);
painter->drawEllipse(QRectF(QPointF(.0, .0), size));
}
void IconWidget::setText(const QString &text)
{
d->text = text;
// cause a relayout
d->currentSize = QSizeF(-1, -1);
//try to relayout, needed if an icon was never shown before
if (!isVisible()) {
QStyleOptionGraphicsItem styleoption;
layoutIcons(&styleoption);
}
resize(sizeFromIconSize(d->iconSize.width()));
}
QString IconWidget::text() const
{
return d->text;
}
void IconWidget::setInfoText(const QString &text)
{
d->infoText = text;
// cause a relayout
d->currentSize = QSizeF(-1, -1);
//try to relayout, needed if an icon was never shown before
if (!isVisible()) {
layoutIcons(new QStyleOptionGraphicsItem);
}
resize(sizeFromIconSize(d->iconSize.width()));
}
QString IconWidget::infoText() const
{
return d->infoText;
}
QIcon IconWidget::icon() const
{
return d->icon;
}
void IconWidget::setIcon(const QString &icon)
{
if (icon.isEmpty()) {
setIcon(QIcon());
return;
}
setIcon(KIcon(icon));
}
void IconWidget::setIcon(const QIcon &icon)
{
d->icon = icon;
}
QSizeF IconWidget::iconSize() const
{
return d->iconSize;
}
bool IconWidget::isDown()
{
return d->states & IconWidgetPrivate::PressedState;
}
void IconWidget::mousePressEvent(QGraphicsSceneMouseEvent *event)
{
if (event->button() != Qt::LeftButton) {
QGraphicsWidget::mousePressEvent(event);
return;
}
d->states |= IconWidgetPrivate::PressedState;
d->clickStartPos = scenePos();
bool handled = false;
foreach (IconAction *action, d->cornerActions) {
handled = action->event(event->type(), event->pos());
if (handled) {
break;
}
}
if (!handled && geometry().contains(event->pos())) {
emit pressed(true);
}
update();
}
void IconWidget::mouseMoveEvent(QGraphicsSceneMouseEvent *event)
{
if (~d->states & IconWidgetPrivate::PressedState) {
QGraphicsWidget::mouseMoveEvent(event);
return;
}
if (boundingRect().contains(event->pos())) {
if (~d->states & IconWidgetPrivate::HoverState) {
d->states |= IconWidgetPrivate::HoverState;
update();
}
} else {
if (d->states & IconWidgetPrivate::HoverState) {
d->states &= ~IconWidgetPrivate::HoverState;
update();
}
}
}
void IconWidget::mouseReleaseEvent(QGraphicsSceneMouseEvent *event)
{
if (~d->states & IconWidgetPrivate::PressedState) {
QGraphicsWidget::mouseMoveEvent(event);
return;
}
d->states &= ~IconWidgetPrivate::PressedState;
//don't pass click when the mouse was moved
bool handled = d->clickStartPos != scenePos();
if (!handled) {
foreach (IconAction *action, d->cornerActions) {
if (action->event(event->type(), event->pos())) {
handled = true;
break;
}
}
}
if (!handled) {
if (boundingRect().contains(event->pos())) {
emit clicked();
if (KGlobalSettings::singleClick()) {
emit activated();
}
}
emit pressed(false);
}
update();
}
void IconWidget::mouseDoubleClickEvent(QGraphicsSceneMouseEvent *event)
{
Q_UNUSED(event)
emit doubleClicked();
if (!KGlobalSettings::singleClick()) {
emit activated();
}
}
void IconWidget::hoverEnterEvent(QGraphicsSceneHoverEvent *event)
{
foreach (IconAction *action, d->cornerActions) {
action->show();
action->event(event->type(), event->pos());
}
hoverEffect(true);
update();
QGraphicsWidget::hoverEnterEvent(event);
}
void IconWidget::hoverLeaveEvent(QGraphicsSceneHoverEvent *event)
{
foreach (IconAction *action, d->cornerActions) {
action->hide();
action->event(event->type(), event->pos());
}
// d->states &= ~IconWidgetPrivate::HoverState; // Will be set once progress is zero again ...
hoverEffect(false);
update();
QGraphicsWidget::hoverLeaveEvent(event);
}
void IconWidget::setPressed(bool pressed)
{
if (pressed) {
d->states |= IconWidgetPrivate::ManualPressedState;
d->states |= IconWidgetPrivate::PressedState;
} else {
d->states &= ~IconWidgetPrivate::ManualPressedState;
d->states &= ~IconWidgetPrivate::PressedState;
}
update();
}
void IconWidget::setUnpressed()
{
setPressed(false);
}
void IconWidgetPrivate::syncToAction()
{
if (!action) {
return;
}
//we don't get told *what* changed, just that something changed
//so we update everything we care about
q->setIcon(action->icon());
q->setText(action->iconText());
q->setEnabled(action->isEnabled());
//TODO use action's tooltip too
emit q->changed();
}
void IconWidget::setOrientation(Qt::Orientation orientation)
{
d->orientation = orientation;
resize(sizeFromIconSize(d->iconSize.width()));
}
void IconWidget::invertLayout(bool invert)
{
d->invertLayout = invert;
}
bool IconWidget::invertedLayout() const
{
return d->invertLayout;
}
QSizeF IconWidget::sizeFromIconSize(const qreal iconWidth) const
{
if (d->text.isEmpty() && d->infoText.isEmpty()) {
//no text, less calculations
return d->addMargin(d->addMargin(QSizeF(iconWidth, iconWidth), IconWidgetPrivate::IconMargin),
IconWidgetPrivate::ItemMargin);
}
QFontMetricsF fm = Plasma::Theme::defaultTheme()->fontMetrics();
qreal width = 0;
if (d->orientation == Qt::Vertical) {
// make room for at most 14 characters
width = qMax(fm.width(d->text.left(12)),
fm.width(d->infoText.left(12))) +
fm.width("xx") +
d->horizontalMargin[IconWidgetPrivate::TextMargin].left +
d->horizontalMargin[IconWidgetPrivate::TextMargin].right;
width = qMax(width,
iconWidth +
d->horizontalMargin[IconWidgetPrivate::IconMargin].left +
d->horizontalMargin[IconWidgetPrivate::IconMargin].right);
} else {
width = iconWidth +
d->horizontalMargin[IconWidgetPrivate::IconMargin].left +
d->horizontalMargin[IconWidgetPrivate::IconMargin].right +
qMax(fm.width(d->text), fm.width(d->infoText)) + fm.width("xx") +
d->horizontalMargin[IconWidgetPrivate::TextMargin].left +
d->horizontalMargin[IconWidgetPrivate::TextMargin].right;
}
qreal height;
qreal textHeight;
QStyleOptionGraphicsItem option;
option.state = QStyle::State_None;
option.rect = boundingRect().toRect();
textHeight = d->displaySizeHint(&option, width).height();
if (d->orientation == Qt::Vertical) {
height = iconWidth + textHeight +
d->verticalMargin[IconWidgetPrivate::TextMargin].top +
d->verticalMargin[IconWidgetPrivate::TextMargin].bottom +
d->verticalMargin[IconWidgetPrivate::IconMargin].top +
d->verticalMargin[IconWidgetPrivate::IconMargin].bottom;
} else {
//Horizontal
height = qMax(iconWidth +
d->verticalMargin[IconWidgetPrivate::IconMargin].top +
d->verticalMargin[IconWidgetPrivate::IconMargin].bottom,
textHeight +
d->verticalMargin[IconWidgetPrivate::TextMargin].top +
d->verticalMargin[IconWidgetPrivate::TextMargin].bottom);
}
return d->addMargin(QSizeF(width, height), IconWidgetPrivate::ItemMargin);
}
} // namespace Plasma
#include "iconwidget.moc"
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