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Cleaned up Plasma::Icon a whole lot, added Fredrik's text drawing code from KFileItemDelegate so we actually draw text correctly.

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svn path=/trunk/KDE/kdebase/workspace/libs/plasma/; revision=696698
This commit is contained in:
Matt Broadstone 2007-08-05 17:11:46 +00:00
parent f33c5ab58b
commit 388d1ca167
3 changed files with 768 additions and 306 deletions
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504
widgets/icon.cpp
View File

@ -2,6 +2,7 @@
* Copyright (C) 2007 by Aaron Seigo <aseigo@kde.org>
* Copyright (C) 2007 by Riccardo Iaconelli <riccardo@kde.org>
* Copyright (C) 2007 by Matt Broadstone <mbroadst@gmail.com>
* Copyright (C) 2006-2007 Fredrik Höglund <fredrik@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 version 2 as
@ -19,12 +20,15 @@
*/
#include "icon.h"
#include "icon_p.h"
#include <QAction>
#include <QApplication>
#include <QPainter>
#include <QGraphicsSceneMouseEvent>
#include <QGraphicsView>
#include <QStyleOptionGraphicsItem>
#include <QTextLayout>
//#define BACKINGSTORE_BLUR_HACK
@ -34,6 +38,9 @@
#include <KIcon>
#include <KImageEffect>
#include <KIconEffect>
#include <KIconLoader>
#include <K3Icon>
#include <KUrl>
#include <KRun>
#include <KMimeType>
@ -46,55 +53,14 @@
namespace Plasma
{
class PLASMA_EXPORT IconAction
{
public:
IconAction(Icon* icon, QAction* action);
void show();
void hide();
bool isVisible() const;
Phase::AnimId animationId() const;
QAction* action() const;
void paint(QPainter *painter) const;
bool event(QEvent::Type type, const QPointF &pos);
void setSelected(bool selected);
bool isSelected() const;
bool isHovered() const;
bool isPressed() const;
void setRect(const QRectF &rect);
QRectF rect() const;
private:
void rebuildPixmap();
Icon* m_icon;
QAction* m_action;
QPixmap m_pixmap;
QRectF m_rect;
bool m_hovered;
bool m_pressed;
bool m_selected;
bool m_visible;
Phase::AnimId m_animationId;
};
class Icon::Private
{
public:
Private()
Icon::Private::Private()
: svg("widgets/iconbutton"),
svgElements(0),
size(128*1.1, 128*1.1),
iconSize(128, 128),
state(Private::NoState)
state(Private::NoState),
orientation(Qt::Vertical),
calculateSizeRequested(true) // First time always true
{
svg.setContentType(Plasma::Svg::ImageSet);
svg.resize(size);
@ -103,17 +69,12 @@ class Icon::Private
checkSvgElements();
}
~Private()
Icon::Private::~Private()
{
qDeleteAll(cornerActions);
}
void drawBackground(QPainter *painter);
void drawForeground(QPainter *painter);
void drawIcon(QPainter *painter);
void drawText(QPainter *painter);
void checkSvgElements()
void Icon::Private::checkSvgElements()
{
if (svg.elementExists("background")) {
svgElements |= SvgBackground;
@ -152,45 +113,7 @@ class Icon::Private
}
}
enum {
NoSvg = 0,
SvgBackground = 1,
SvgBackgroundHover = 2,
SvgBackgroundPressed = 4,
SvgForeground = 8,
SvgForegroundHover = 16,
SvgForegroundPressed = 32,
SvgMinibutton = 64,
SvgMinibuttonHover = 128,
SvgMinibuttonPressed = 256
};
enum ActionPosition {
TopLeft = 0,
TopRight,
BottomLeft,
BottomRight,
LastIconPosition
};
enum ButtonState
{
NoState,
HoverState,
PressedState
};
QString text;
QString infoText;
Svg svg;
int svgElements;
QSizeF size;
QSizeF iconSize;
QIcon icon;
ButtonState state;
QList<IconAction*> cornerActions;
};
IconAction::IconAction(Icon* icon, QAction *action)
: m_icon(icon),
@ -349,14 +272,14 @@ void IconAction::paint(QPainter *painter) const
}
Icon::Icon(QGraphicsItem *parent)
: QGraphicsItem(parent),
: Plasma::Widget(parent),
d(new Private)
{
init();
}
Icon::Icon(const QString &text, QGraphicsItem *parent)
: QGraphicsItem(parent),
: Plasma::Widget(parent),
d(new Private)
{
setText(text);
@ -364,7 +287,7 @@ Icon::Icon(const QString &text, QGraphicsItem *parent)
}
Icon::Icon(const QIcon &icon, const QString &text, QGraphicsItem *parent)
: QGraphicsItem(parent),
: Plasma::Widget(parent),
d(new Private)
{
setText(text);
@ -379,8 +302,21 @@ Icon::~Icon()
void Icon::init()
{
setAcceptedMouseButtons(Qt::LeftButton);
// 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(Private::TextMargin, focusHMargin, focusVMargin);
d->setHorizontalMargin(Private::IconMargin, focusHMargin, focusVMargin);
d->setHorizontalMargin(Private::ItemMargin, 0, 0);
// Margins for vertical mode (icon views)
d->setVerticalMargin(Private::TextMargin, 6, 2);
d->setVerticalMargin(Private::IconMargin, focusHMargin, focusVMargin);
d->setVerticalMargin(Private::ItemMargin, 0, 0);
}
void Icon::addAction(QAction *action)
@ -426,17 +362,55 @@ void Icon::actionDestroyed(QObject* action)
update(); // redraw since an action has been deleted.
}
void Icon::calculateSize()
QSizeF Icon::Private::displaySizeHint(const QStyleOptionGraphicsItem *option) const
{
prepareGeometryChange();
QFontMetrics fm(QApplication::font()); // TODO: get the font somewhere more appropriate
QSizeF fmSize = fm.size(Qt::AlignHCenter | Qt::AlignTop, d->text);
QString label = text;
const qreal maxWidth = (orientation == Qt::Vertical) ? iconSize.width() + 10 : 32757;
kDebug() << "Icon::Private::displaySizeHint maxWidth: " << maxWidth;
int margin = 6; // hmmm
qreal height = d->iconSize.height() + (margin*2) + fmSize.height();
qreal width = margin + qMax(fmSize.width(), d->iconSize.width()) + margin;
d->size = QSizeF(width, height);
// To compute the nominal size for the label + info, we'll just append
// the information string to the label
const QString info = infoText;
if (!info.isEmpty())
label += QString(QChar::LineSeparator) + info;
QTextLayout layout;
setLayoutOptions(layout, option);
kDebug() << "Icon::Private::displaySizeHint maxWidth: " << maxWidth;
QSizeF size = layoutText(layout, option, label, QSizeF(iconSize.width() + 10, 32757));
kDebug() << "Icon::Private::displaySizeHint size.width: " << size.width();
return addMargin(size, TextMargin);
}
void Icon::calculateSize(const QStyleOptionGraphicsItem *option)
{
if (!d->calculateSizeRequested)
return;
prepareGeometryChange();
d->setActiveMargins();
const QSizeF displaySize = d->displaySizeHint(option);
const QSizeF decorationSize = d->addMargin(d->iconSize, Private::IconMargin);
QSizeF newSize;
if (d->orientation == Qt::Vertical)
{
newSize.rwidth() = qMax(decorationSize.width(), displaySize.width());
newSize.rheight() = decorationSize.height() + displaySize.height() + 1;
}
else
{
newSize.rwidth() = decorationSize.width() + displaySize.width() + 1;
newSize.rheight() = qMax(decorationSize.height(), displaySize.height());
}
kDebug() << "Icon::calculateSize newSize: " << newSize;
d->size = d->addMargin(newSize, Private::ItemMargin);
d->svg.resize(d->size);
d->calculateSizeRequested = false;
int count = 0;
foreach (IconAction* iconAction, d->cornerActions) {
@ -527,44 +501,266 @@ void Icon::Private::drawForeground(QPainter *painter)
}
}
void Icon::Private::drawIcon(QPainter *painter)
QPixmap Icon::Private::decoration(const QStyleOptionGraphicsItem *option) const
{
if (!icon.isNull()) {
qreal iw = iconSize.width();
qreal ih = iconSize.height();
qreal deltaX = (size.width() - iw) / 2;
qreal deltaY = (size.height() - ih) / 2 ;
if (state == Private::PressedState) {
painter->save();
painter->setRenderHint(QPainter::SmoothPixmapTransform);
painter->scale(0.95, 0.95);
deltaY *= 0.95;
deltaX *= 0.95;
painter->drawPixmap((int)(deltaX + (iw * .025)), (int)(deltaY + (ih * .025)),
icon.pixmap(iconSize.toSize()));
painter->restore();
} else {
painter->drawPixmap((int)deltaX, (int)deltaY, icon.pixmap(iconSize.toSize()));
}
}
}
QPixmap result;
void Icon::Private::drawText(QPainter *painter)
QIcon::Mode mode = option->state & QStyle::State_Enabled ? QIcon::Normal : QIcon::Disabled;
QIcon::State state = option->state & QStyle::State_Open ? QIcon::On : QIcon::Off;
const QSize size = icon.actualSize(iconSize.toSize(), mode, state);
result = icon.pixmap(size, mode, state);
if (!result.isNull())
{
if (!text.isEmpty()) {
qreal offset = (iconSize.height() + 12); // TODO this shouldn't be hardcoded?
QRectF textRect(0, offset, size.width(), size.height() - offset);
// Apply the configured hover effect NOTE: This has no visible effect because we
// do drawForeground() -MB
if (option->state & QStyle::State_MouseOver) {
KIconEffect *effect = KIconLoader::global()->iconEffect();
QTextOption textOpt;
textOpt.setAlignment(Qt::AlignHCenter | Qt::AlignTop);
textOpt.setWrapMode(QTextOption::WordWrap);
painter->setPen(Qt::white);
painter->drawText(textRect, text, textOpt);
// Note that in KIconLoader terminology, active = hover.
// ### We're assuming that the icon group is desktop/filemanager, since this
// is KFileItemDelegate.
if (effect->hasEffect(K3Icon::Desktop, K3Icon::ActiveState)) {
result = effect->apply(result, K3Icon::Desktop, K3Icon::ActiveState);
}
}
}
void Icon::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget)
return result;
}
QPointF Icon::Private::iconPosition(const QStyleOptionGraphicsItem *option, const QPixmap &pixmap) const
{
const QRectF itemRect = subtractMargin(option->rect, Private::ItemMargin);
Qt::Alignment alignment = Qt::AlignHCenter | Qt::AlignTop; // NOTE: This assumes always top-center -MB
// Compute the nominal decoration rectangle
const QSizeF size = addMargin(iconSize, Private::IconMargin);
const QRect iconRect = QStyle::alignedRect(option->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 Icon::Private::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, Private::IconMargin);
kDebug() << "Icon::Private::labelRectangle option->rect: " << option->rect;
const QRectF itemRect = subtractMargin(option->rect, Private::ItemMargin);
QRectF textArea(QPointF(0, 0), itemRect.size());
textArea.setTop(decoSize.height() + 1);
textArea.translate(itemRect.topLeft());
return QRectF(QStyle::visualRect(option->direction, option->rect, textArea.toRect()));
}
// Lays the text out in a rectangle no larger than constraints, eliding it as necessary
QSizeF Icon::Private::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 Icon::Private::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();
// kDebug() << "layoutText called with maxWidth: " << maxWidth;
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 layout.boundingRect().size(); // ARGH!
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 Icon::Private::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;
// If the string contains a single line of text it shouldn't be word wrapped
if (text.indexOf(QChar::LineSeparator) == -1)
return metrics.elidedText(text, Qt::ElideRight, maxWidth);
// 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 && 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 Icon::Private::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, Private::TextMargin);
// 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
kDebug() << "Icon::Private::layoutTextItems maxLabelSize: " << maxLabelSize;
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(option->direction, 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()));
}
QBrush Icon::Private::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 Icon::Private::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 Icon::Private::drawTextItems(QPainter *painter, const QStyleOptionGraphicsItem *option,
const QTextLayout &labelLayout, const QTextLayout &infoLayout) const
{
QPen pen(foregroundBrush(option), 0);
painter->setPen(pen);
labelLayout.draw(painter, QPointF());
if (!infoLayout.text().isEmpty())
{
QColor color;
if (option->state & QStyle::State_Selected)
{
color = option->palette.color(QPalette::HighlightedText);
color.setAlphaF(.5);
} else
color = option->palette.color(QPalette::Highlight);
painter->setPen(color);
infoLayout.draw(painter, QPointF());
}
}
void Icon::paintWidget(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget)
{
Q_UNUSED(option)
Q_UNUSED(widget)
@ -585,9 +781,23 @@ void Icon::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWid
}
#endif
calculateSize(option);
d->setActiveMargins();
// Compute the metrics, and lay out the text items
// ========================================================================
QPixmap icon = d->decoration(option);
const QPointF iconPos = d->iconPosition(option, icon);
QTextLayout labelLayout, infoLayout;
QRectF textBoundingRect;
d->layoutTextItems(option, icon, &labelLayout, &infoLayout, &textBoundingRect);
d->svg.resize(d->size);
d->drawBackground(painter);
d->drawIcon(painter);
// draw icon
painter->drawPixmap(iconPos, icon);
d->drawForeground(painter);
@ -599,7 +809,8 @@ void Icon::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWid
}
// Draw text last because its overlayed
d->drawText(painter);
d->drawTextItems(painter, option, labelLayout, infoLayout);
}
void Icon::drawActionButtonBase(QPainter* painter, const QSize &size, int element)
@ -631,7 +842,7 @@ void Icon::drawActionButtonBase(QPainter* painter, const QSize &size, int elemen
void Icon::setText(const QString& text)
{
d->text = text;
calculateSize();
d->calculateSizeRequested = true;
}
QString Icon::text() const
@ -642,7 +853,7 @@ QString Icon::text() const
void Icon::setInfoText(const QString& text)
{
d->infoText = text;
calculateSize();
d->calculateSizeRequested = true;
}
QString Icon::infoText() const
@ -663,7 +874,7 @@ void Icon::setIcon(const QString& icon)
void Icon::setIcon(const QIcon& icon)
{
d->icon = icon;
calculateSize();
d->calculateSizeRequested = true;
}
QSizeF Icon::iconSize() const
@ -674,7 +885,7 @@ QSizeF Icon::iconSize() const
void Icon::setIconSize(const QSizeF& s)
{
d->iconSize = s;
calculateSize();
d->calculateSizeRequested = true;
}
void Icon::setIconSize(int w, int h)
@ -689,22 +900,21 @@ bool Icon::isDown()
void Icon::mousePressEvent(QGraphicsSceneMouseEvent *event)
{
kDebug() << "Icon::mousePressEvent ";
foreach (IconAction *action, d->cornerActions) {
action->event(event->type(), event->pos());
}
d->state = Private::PressedState;
QGraphicsItem::mousePressEvent(event);
update();
event->accept();
}
void Icon::mouseReleaseEvent(QGraphicsSceneMouseEvent *event)
{
bool inside = boundingRect().contains(event->pos());
kDebug() << "Icon::mouseReleaseEvent " << inside;
Private::ButtonState was = d->state;
if (inside) {
d->state = Private::HoverState;
@ -714,16 +924,17 @@ kDebug() << "Icon::mouseReleaseEvent " << inside;
break;
}
}
} else {
d->state = Private::NoState;
}
if (was == Private::PressedState) {
else if (was == Private::PressedState) {
emit pressed(false);
if (inside) {
emit clicked();
}
d->state = Private::NoState;
}
else {
d->state = Private::NoState;
}
QGraphicsItem::mouseReleaseEvent(event);
@ -761,7 +972,6 @@ void Icon::mouseMoveEvent(QGraphicsSceneMouseEvent *event)
QGraphicsItem::mouseMoveEvent(event);
}
QSizeF Icon::sizeHint() const
{
return d->size;

17
widgets/icon.h
View File

@ -27,10 +27,9 @@
#include <plasma/dataengine.h>
#include <plasma/phase.h>
#include <plasma/plasma_export.h>
#include <plasma/widgets/layoutitem.h>
#include <plasma/widgets/widget.h>
class QAction;
class KUrl;
/**
* This class provides a generic Icon for the Plasma desktop. An icon, in this
@ -44,13 +43,12 @@ class KUrl;
namespace Plasma
{
class PLASMA_EXPORT Icon : public QObject, public QGraphicsItem, public LayoutItem
class PLASMA_EXPORT Icon : public Plasma::Widget
{
Q_OBJECT
Q_PROPERTY( QString text READ text WRITE setText )
Q_PROPERTY( QString infoText READ infoText WRITE setInfoText )
Q_PROPERTY( QSizeF iconSize READ iconSize WRITE setIconSize )
public:
/**
* Creates a new Plasma::Icon.
@ -117,13 +115,13 @@ class PLASMA_EXPORT Icon : public QObject, public QGraphicsItem, public LayoutIt
/**
* Returns the size of this Plasma::Icon's graphical icon.
*/
QSizeF iconSize() const;
Q_INVOKABLE QSizeF iconSize() const;
/**
* Sets the size of the graphical icon for this Plasma::Icon.
* @param size the size of the icon.
*/
void setIconSize(const QSizeF& size);
Q_INVOKABLE void setIconSize(const QSizeF& size);
/**
* Convenience method to set the icon size without a QSizeF.
@ -132,7 +130,6 @@ class PLASMA_EXPORT Icon : public QObject, public QGraphicsItem, public LayoutIt
*/
Q_INVOKABLE void setIconSize(int height, int width);
/**
* Plasma::Icon allows the user to specify a number of actions
* (current four) to be displayed around the widget. This method
@ -161,7 +158,7 @@ class PLASMA_EXPORT Icon : public QObject, public QGraphicsItem, public LayoutIt
QRectF boundingRect() const;
protected:
void paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget = 0);
void paintWidget(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget = 0);
Q_SIGNALS:
/**
@ -192,14 +189,14 @@ class PLASMA_EXPORT Icon : public QObject, public QGraphicsItem, public LayoutIt
void drawActionButtonBase(QPainter* painter, const QSize &size, int element);
private:
QPixmap buttonPixmap();
void init();
void calculateSize();
void calculateSize(const QStyleOptionGraphicsItem *option);
Private * const d;
private Q_SLOTS:
void actionDestroyed(QObject* obj);
};
} // namespace Plasma

255
widgets/icon_p.h Normal file
View File

@ -0,0 +1,255 @@
/*
* Copyright (C) 2007 by Aaron Seigo <aseigo@kde.org>
* Copyright (C) 2007 by Matt Broadstone <mbroadst@gmail.com>
* Copyright (C) 2006-2007 Fredrik Höglund <fredrik@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 version 2 as
* published by the Free Software Foundation
*
* 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.
*/
#ifndef ICON_P_H
#define ICON_P_H
#include <QtCore/QEvent>
#include <QtGui/QApplication>
#include <QtGui/QStyleOptionGraphicsItem>
#include <QtGui/QTextLayout>
#include <QtGui/QTextOption>
#include <QtGui/QIcon>
#include <plasma/plasma_export.h>
#include <plasma/svg.h>
#include "icon.h"
class QAction;
class QPainter;
class QTextLayout;
namespace Plasma
{
class PLASMA_EXPORT IconAction
{
public:
IconAction(Icon* icon, QAction* action);
void show();
void hide();
bool isVisible() const;
Phase::AnimId animationId() const;
QAction* action() const;
void paint(QPainter *painter) const;
bool event(QEvent::Type type, const QPointF &pos);
void setSelected(bool selected);
bool isSelected() const;
bool isHovered() const;
bool isPressed() const;
void setRect(const QRectF &rect);
QRectF rect() const;
private:
void rebuildPixmap();
Icon *m_icon;
QAction *m_action;
QPixmap m_pixmap;
QRectF m_rect;
bool m_hovered;
bool m_pressed;
bool m_selected;
bool m_visible;
Phase::AnimId m_animationId;
};
struct Margin
{
qreal left, right, top, bottom;
};
class Icon::Private
{
public:
enum MarginType { ItemMargin = 0, TextMargin, IconMargin, NMargins };
public:
Private();
~Private();
void drawBackground(QPainter *painter);
void drawForeground(QPainter *painter);
void drawText(QPainter *painter);
void drawTextItems(QPainter *painter, const QStyleOptionGraphicsItem *option,
const QTextLayout &labelLayout, const QTextLayout &infoLayout) const;
QPixmap decoration(const QStyleOptionGraphicsItem *option) const;
QPointF iconPosition(const QStyleOptionGraphicsItem *option, const QPixmap &pixmap) const;
QSizeF displaySizeHint(const QStyleOptionGraphicsItem *option) const;
QBrush foregroundBrush(const QStyleOptionGraphicsItem *option) const;
QBrush backgroundBrush(const QStyleOptionGraphicsItem *option) const;
QString elidedText(QTextLayout &layout, const QStyleOptionGraphicsItem *option,
const QSizeF &maxSize) const;
QSizeF layoutText(QTextLayout &layout, const QStyleOptionGraphicsItem *option,
const QString &text, const QSizeF &constraints) const;
QSizeF layoutText(QTextLayout &layout, const QString &text, qreal maxWidth) const;
QRectF labelRectangle(const QStyleOptionGraphicsItem *option, const QPixmap &icon,
const QString &string) const;
void layoutTextItems(const QStyleOptionGraphicsItem *option, const QPixmap &icon,
QTextLayout *labelLayout, QTextLayout *infoLayout, QRectF *textBoundingRect) const;
inline void setLayoutOptions(QTextLayout &layout, const QStyleOptionGraphicsItem *options) const;
// Margin functions
inline void setActiveMargins();
void setVerticalMargin(MarginType type, qreal left, qreal right, qreal top, qreal bottom);
void setHorizontalMargin(MarginType type, qreal left, qreal right, qreal top, qreal bottom);
inline void setVerticalMargin(MarginType type, qreal hor, qreal ver);
inline void setHorizontalMargin(MarginType type, qreal hor, qreal ver);
inline QRectF addMargin(const QRectF &rect, MarginType type) const;
inline QRectF subtractMargin(const QRectF &rect, MarginType type) const;
inline QSizeF addMargin(const QSizeF &size, MarginType type) const;
inline QSizeF subtractMargin(const QSizeF &size, MarginType type) const;
void checkSvgElements();
enum {
NoSvg = 0,
SvgBackground = 1,
SvgBackgroundHover = 2,
SvgBackgroundPressed = 4,
SvgForeground = 8,
SvgForegroundHover = 16,
SvgForegroundPressed = 32,
SvgMinibutton = 64,
SvgMinibuttonHover = 128,
SvgMinibuttonPressed = 256
};
enum ActionPosition {
TopLeft = 0,
TopRight,
BottomLeft,
BottomRight,
LastIconPosition
};
enum ButtonState
{
NoState,
HoverState,
PressedState
};
QString text;
QString infoText;
Svg svg;
int svgElements;
QSizeF size;
QSizeF iconSize;
QIcon icon;
ButtonState state;
Qt::Orientation orientation;
bool calculateSizeRequested;
QList<IconAction*> cornerActions;
Margin verticalMargin[NMargins];
Margin horizontalMargin[NMargins];
Margin *activeMargins;
};
// Inline methods
void Icon::Private::setLayoutOptions(QTextLayout &layout, const QStyleOptionGraphicsItem *option) const
{
QTextOption textoption;
textoption.setTextDirection(option->direction);
textoption.setAlignment(Qt::AlignCenter); // NOTE: assumption
textoption.setWrapMode(QTextOption::WordWrap); // NOTE: assumption as well
layout.setFont(QApplication::font()); // NOTE: find better ways to get the font
layout.setTextOption(textoption);
}
void Icon::Private::setActiveMargins()
{
activeMargins = (orientation == Qt::Horizontal ?
horizontalMargin : verticalMargin);
}
void Icon::Private::setVerticalMargin(MarginType type, qreal left, qreal top, qreal right, qreal bottom)
{
verticalMargin[type].left = left;
verticalMargin[type].right = right;
verticalMargin[type].top = top;
verticalMargin[type].bottom = bottom;
}
void Icon::Private::setHorizontalMargin(MarginType type, qreal left, qreal top, qreal right, qreal bottom)
{
horizontalMargin[type].left = left;
horizontalMargin[type].right = right;
horizontalMargin[type].top = top;
horizontalMargin[type].bottom = bottom;
}
void Icon::Private::setVerticalMargin(MarginType type, qreal horizontal, qreal vertical)
{
setVerticalMargin(type, horizontal, vertical, horizontal, vertical);
}
void Icon::Private::setHorizontalMargin(MarginType type, qreal horizontal, qreal vertical)
{
setHorizontalMargin(type, horizontal, vertical, horizontal, vertical);
}
QRectF Icon::Private::addMargin(const QRectF &rect, MarginType type) const
{
const Margin &m = activeMargins[type];
return rect.adjusted(-m.left, -m.top, m.right, m.bottom);
}
QRectF Icon::Private::subtractMargin(const QRectF &rect, MarginType type) const
{
const Margin &m = activeMargins[type];
return rect.adjusted(m.left, m.top, -m.right, -m.bottom);
}
QSizeF Icon::Private::addMargin(const QSizeF &size, MarginType type) const
{
const Margin &m = activeMargins[type];
return QSizeF(size.width() + m.left + m.right, size.height() + m.top + m.bottom);
}
QSizeF Icon::Private::subtractMargin(const QSizeF &size, MarginType type) const
{
const Margin &m = activeMargins[type];
return QSizeF(size.width() - m.left - m.right, size.height() - m.top - m.bottom);
}
} // Namespace
#endif