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plasma-framework/private/applethandle.cpp
Marco Martin 1cb382a09a new look and animation for applet handles, based on an old Nuno mockup, 
that uses the standard applet background (will have new graphics).

also, don't use painter->setOpacity anymore, so should be a bit faster

the look is slightly different in 3 cases:
-the applet is smaller than the handle, the panelsvg gets drawn
completely and looks like the old thing
-shape not rectangular: the panelsvg is wider, so it's visible also for
instance behind the clock circle
-normal: only a bit of the panelsvg exits from the applet and is
visible, the hidden part has a few pixels fade out gradient to look less wrong with
transparent backgrounds like folderview or themes with all backgrounds
more transparent

svn path=/trunk/KDE/kdebase/workspace/libs/plasma/; revision=862411
2008-09-18 19:40:46 +00:00

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/*
* Copyright 2007 by Kevin Ottens <ervin@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 "private/applethandle_p.h"
#include <QApplication>
#include <QBitmap>
#include <QtGui/QGraphicsSceneMouseEvent>
#include <QtGui/QLinearGradient>
#include <QtGui/QPainter>
#include <QtGui/QApplication>
#include <KColorScheme>
#include <KGlobalSettings>
#include <KIcon>
#include <KIconLoader>
#include <KWindowSystem>
#include <cmath>
#include <math.h>
#include "applet.h"
#include "applet_p.h"
#include "containment.h"
#include "corona.h"
#include "paintutils.h"
#include "theme.h"
#include "view.h"
#include "panelsvg.h"
namespace Plasma
{
qreal _k_angleForPoints(const QPointF &center, const QPointF &pt1, const QPointF &pt2);
AppletHandle::AppletHandle(Containment *parent, Applet *applet, const QPointF &hoverPos)
: QObject(),
QGraphicsItem(parent),
m_pressedButton(NoButton),
m_containment(parent),
m_applet(applet),
m_iconSize(16),
m_opacity(0.0),
m_anim(FadeIn),
m_animId(0),
m_angle(0.0),
m_tempAngle(0.0),
m_scaleWidth(1.0),
m_scaleHeight(1.0),
m_topview(0),
m_backgroundBuffer(0),
m_currentView(applet->view()),
m_entryPos(hoverPos),
m_buttonsOnRight(false),
m_pendingFade(false)
{
KColorScheme colorScheme(QPalette::Active, KColorScheme::View, Theme::defaultTheme()->colorScheme());
m_gradientColor = colorScheme.background(KColorScheme::NormalBackground).color();
QTransform originalMatrix = m_applet->transform();
m_applet->resetTransform();
QRectF rect(m_applet->contentsRect());
QPointF center = rect.center();
originalMatrix.translate(center.x(), center.y());
qreal cosine = originalMatrix.m11();
qreal sine = originalMatrix.m12();
m_angle = _k_angleForPoints(QPointF(0, 0),
QPointF(1, 0),
QPointF(cosine, sine));
m_applet->setParentItem(this);
rect = QRectF(m_applet->pos(), m_applet->size());
center = rect.center();
QTransform matrix;
matrix.translate(center.x(), center.y());
matrix.rotateRadians(m_angle);
matrix.translate(-center.x(), -center.y());
setTransform(matrix);
m_hoverTimer = new QTimer(this);
m_hoverTimer->setSingleShot(true);
m_hoverTimer->setInterval(333);
m_leaveTimer = new QTimer(this);
m_leaveTimer->setSingleShot(true);
m_leaveTimer->setInterval(500);
connect(m_hoverTimer, SIGNAL(timeout()), this, SLOT(fadeIn()));
connect(m_leaveTimer, SIGNAL(timeout()), this, SLOT(leaveTimeout()));
connect(m_applet, SIGNAL(destroyed(QObject*)), this, SLOT(appletDestroyed()));
setAcceptsHoverEvents(true);
m_hoverTimer->start();
//icons
m_configureIcons = new Svg(this);
m_configureIcons->setImagePath("widgets/configuration-icons");
//FIXME: this should be of course true, but works only if false
m_configureIcons->setContainsMultipleImages(true);
m_background = new PanelSvg(this);
m_background->setImagePath("widgets/background");
//We got to be able to see the applet while dragging to to another containment,
//so we want a high zValue.
//FIXME: apparently this doesn't work: sometimes an applet still get's drawn behind
//the containment it's being dragged to, sometimes it doesn't.
m_zValue = m_applet->zValue()-1;
m_applet->raise();
m_applet->installSceneEventFilter(this);
setZValue(m_applet->zValue());
}
AppletHandle::~AppletHandle()
{
detachApplet();
if (m_topview) {
delete m_topview;
}
}
Applet *AppletHandle::applet() const
{
return m_applet;
}
void AppletHandle::detachApplet ()
{
if (!m_applet) {
return;
}
disconnect(m_hoverTimer, SIGNAL(timeout()), this, SLOT(fadeIn()));
disconnect(m_leaveTimer, SIGNAL(timeout()), this, SLOT(leaveTimeout()));
m_applet->disconnect(this);
m_applet->removeSceneEventFilter(this);
QRectF rect = QRectF(m_applet->pos(), m_applet->size());
QPointF center = m_applet->mapFromParent(rect.center());
QPointF newPos = transform().inverted().map(m_applet->pos());
m_applet->setPos(mapToParent(newPos));
QTransform matrix;
matrix.translate(center.x(), center.y());
matrix.rotateRadians(m_angle);
matrix.translate(-center.x(), -center.y());
m_applet->setTransform(matrix);
m_applet->setParentItem(m_containment);
m_applet->setZValue(m_zValue);
m_applet->update(); // re-render the background, now we've transformed the applet
m_applet = 0;
}
QRectF Plasma::AppletHandle::boundingRect() const
{
return m_totalRect;
}
QPainterPath AppletHandle::shape() const
{
//when the containment changes the applet is resetted to 0
if (m_applet) {
QPainterPath path = PaintUtils::roundedRectangle(m_decorationRect, 10);
return path.united(m_applet->mapToParent(m_applet->shape()));
} else {
return QGraphicsItem::shape();
}
}
QPainterPath handleRect(const QRectF &rect, int radius, bool onRight)
{
QPainterPath path;
if (onRight) {
// make the left side straight
path.moveTo(rect.left(), rect.top()); // Top left
path.lineTo(rect.right() - radius, rect.top()); // Top side
path.quadTo(rect.right(), rect.top(), rect.right(), rect.top() + radius); // Top right corner
path.lineTo(rect.right(), rect.bottom() - radius); // Right side
path.quadTo(rect.right(), rect.bottom(), rect.right() - radius, rect.bottom()); // Bottom right corner
path.lineTo(rect.left(), rect.bottom()); // Bottom side
} else {
// make the right side straight
path.moveTo(QPointF(rect.left(), rect.top() + radius));
path.quadTo(rect.left(), rect.top(), rect.left() + radius, rect.top()); // Top left corner
path.lineTo(rect.right(), rect.top()); // Top side
path.lineTo(rect.right(), rect.bottom()); // Right side
path.lineTo(rect.left() + radius, rect.bottom()); // Bottom side
path.quadTo(rect.left(), rect.bottom(), rect.left(), rect.bottom() - radius); // Bottom left corner
}
path.closeSubpath();
return path;
}
void AppletHandle::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget)
{
Q_UNUSED(option);
Q_UNUSED(widget);
if (m_opacity == 0) {
return;
}
painter->save();
if (m_buttonsOnRight) {
painter->translate(-(1 - m_opacity) * m_rect.width(), 0);
} else {
painter->translate((1 - m_opacity) * m_rect.width(), 0);
}
painter->setPen(Qt::NoPen);
painter->setRenderHints(QPainter::Antialiasing);
int iconMargin = m_iconSize / 2;
const QSize pixmapSize(m_decorationRect.width() + m_iconSize + 1, m_decorationRect.height());
const QSizeF iconSize(KIconLoader::SizeSmall, KIconLoader::SizeSmall);
//regenerate our buffer?
if (m_animId > 0 || !m_backgroundBuffer || m_backgroundBuffer->size() != pixmapSize) {
QColor transparencyColor = Qt::black;
transparencyColor.setAlphaF(qMin(m_opacity, qreal(0.99)));
QLinearGradient g(QPoint(0,0), QPoint(m_decorationRect.width(),0));
//fading out panel
if (m_rect.height() > qreal(minimumHeight()) * 1.25) {
if (m_buttonsOnRight) {
qreal opaquePoint = m_background->marginSize(LeftMargin) / m_decorationRect.width();
g.setColorAt(0.0, Qt::transparent);
g.setColorAt(opaquePoint-0.05, Qt::transparent);
g.setColorAt(opaquePoint, transparencyColor);
g.setColorAt(1.0, transparencyColor);
} else {
qreal opaquePoint = 1 - (m_background->marginSize(RightMargin) / m_decorationRect.width());
g.setColorAt(1.0, Qt::transparent);
g.setColorAt(opaquePoint, Qt::transparent);
g.setColorAt(opaquePoint-0.05, transparencyColor);
g.setColorAt(0.0, transparencyColor);
}
//complete panel
} else {
g.setColorAt(0.0, transparencyColor);
}
m_background->resizePanel(m_decorationRect.size());
if (!m_backgroundBuffer || m_backgroundBuffer->size() != pixmapSize) {
delete m_backgroundBuffer;
m_backgroundBuffer = new QPixmap(pixmapSize);
}
m_backgroundBuffer->fill(Qt::transparent);
QPainter buffPainter(m_backgroundBuffer);
m_background->paintPanel(&buffPainter);
//+1 because otherwise due to rounding errors when rotated could appear one pixel
//of the icon at the border of the applet
QRectF iconRect(QPointF(pixmapSize.width() - m_iconSize + 1, m_iconSize), iconSize);
if (m_buttonsOnRight) {
m_configureIcons->paint(&buffPainter, iconRect, "size-diagonal-tr2bl");
} else {
m_configureIcons->paint(&buffPainter, iconRect, "size-diagonal-tl2br");
}
iconRect.translate(0, m_iconSize);
m_configureIcons->paint(&buffPainter, iconRect, "rotate");
iconRect.translate(0, m_iconSize);
m_configureIcons->paint(&buffPainter, iconRect, "configure");
iconRect.translate(0, m_iconSize);
m_configureIcons->paint(&buffPainter, iconRect, "close");
buffPainter.setCompositionMode(QPainter::CompositionMode_DestinationIn);
//blend the background
buffPainter.fillRect(QRect(QPoint(0,0),m_decorationRect.size().toSize()), g);
//blend the icons
buffPainter.fillRect(QRect(QPoint((int)m_decorationRect.width(), 0), QSize(m_iconSize + 1, (int)m_decorationRect.height())), transparencyColor);
}
painter->drawPixmap(m_decorationRect.toRect(), *m_backgroundBuffer, QRect(QPoint(0,0), m_decorationRect.size().toSize()));
//XXX this code is duplicated in the next function
QPointF basePoint = m_rect.topLeft() + QPointF(HANDLE_MARGIN, iconMargin);
QPointF step = QPointF(0, m_iconSize + iconMargin);
QPointF separator = step + QPointF(0, iconMargin);
//end duplicate code
QPointF shiftC;
QPointF shiftD;
QPointF shiftR;
QPointF shiftM;
switch(m_pressedButton)
{
case ConfigureButton:
shiftC = QPointF(2, 2);
break;
case RemoveButton:
shiftD = QPointF(2, 2);
break;
case RotateButton:
shiftR = QPointF(2, 2);
break;
case ResizeButton:
shiftM = QPointF(2, 2);
break;
default:
break;
}
QRectF sourceIconRect(QPointF(pixmapSize.width() - m_iconSize + 1, m_iconSize), iconSize);
if (m_applet && m_applet->aspectRatioMode() != FixedSize) {
//resize
painter->drawPixmap(QRectF(basePoint + shiftM, iconSize), *m_backgroundBuffer, sourceIconRect);
basePoint += step;
}
//rotate
sourceIconRect.translate(0, m_iconSize);
painter->drawPixmap(QRectF(basePoint + shiftR, iconSize), *m_backgroundBuffer, sourceIconRect);
if (m_applet && m_applet->hasConfigurationInterface()) {
basePoint += step;
sourceIconRect.translate(0, m_iconSize);
painter->drawPixmap(QRectF(basePoint + shiftC, iconSize), *m_backgroundBuffer, sourceIconRect);
}
//close
basePoint = m_rect.bottomLeft() + QPointF(HANDLE_MARGIN, 0) - step;
sourceIconRect.translate(0, m_iconSize);
painter->drawPixmap(QRectF(basePoint + shiftD, iconSize), *m_backgroundBuffer, sourceIconRect);
painter->restore();
}
AppletHandle::ButtonType AppletHandle::mapToButton(const QPointF &point) const
{
int iconMargin = m_iconSize / 2;
//XXX this code is duplicated in the prev. function
QPointF basePoint = m_rect.topLeft() + QPointF(HANDLE_MARGIN, iconMargin);
QPointF step = QPointF(0, m_iconSize + iconMargin);
QPointF separator = step + QPointF(0, iconMargin);
//end duplicate code
QRectF activeArea = QRectF(basePoint, QSizeF(m_iconSize, m_iconSize));
if (m_applet && m_applet->aspectRatioMode() != FixedSize) {
if (activeArea.contains(point)) {
return ResizeButton;
}
activeArea.translate(step);
}
if (activeArea.contains(point)) {
return RotateButton;
}
if (m_applet && m_applet->hasConfigurationInterface()) {
activeArea.translate(step);
if (activeArea.contains(point)) {
return ConfigureButton;
}
}
activeArea.moveTop(m_rect.bottom() - activeArea.height() - iconMargin);
if (activeArea.contains(point)) {
return RemoveButton;
}
return MoveButton;
//return m_applet->mapToParent(m_applet->shape()).contains(point) ? NoButton : MoveButton;
}
void AppletHandle::mousePressEvent(QGraphicsSceneMouseEvent *event)
{
//containment recently switched?
if (!m_applet) {
QGraphicsItem::mousePressEvent(event);
return;
}
if (m_pendingFade) {
//m_pendingFade = false;
return;
}
if (event->button() == Qt::LeftButton) {
m_pressedButton = mapToButton(event->pos());
//kDebug() << "button pressed:" << m_pressedButton;
if (m_pressedButton != NoButton) {
m_applet->raise();
m_zValue = m_applet->zValue();
setZValue(m_zValue);
}
if (m_pressedButton == MoveButton) {
m_pos = pos();
}
event->accept();
update();
//set mousePos to the position in the applet, in screencoords, so it becomes easy
//to reposition the toplevel view to the correct position.
QPoint localpos = m_containment->view()->mapFromScene(m_applet->scenePos());
m_mousePos = event->screenPos() - m_containment->view()->mapToGlobal(localpos);
return;
}
QGraphicsItem::mousePressEvent(event);
}
bool AppletHandle::leaveCurrentView(const QPoint &pos) const
{
foreach (QWidget *widget, QApplication::topLevelWidgets()) {
if (widget->geometry().contains(pos)) {
//is this widget a plasma view, a different view then our current one,
//AND not a dashboardview?
Plasma::View *v = qobject_cast<Plasma::View *>(widget);
if (v && v != m_currentView
&& v != m_topview
&& v->containment() != m_containment) {
return true;
}
}
}
return false;
}
void AppletHandle::mouseReleaseEvent(QGraphicsSceneMouseEvent *event)
{
//kDebug() << "button pressed:" << m_pressedButton << ", fade pending?" << m_pendingFade;
if (m_pendingFade) {
startFading(FadeOut, m_entryPos);
m_pendingFade = false;
}
ButtonType releasedAtButton = mapToButton(event->pos());
if (m_applet && event->button() == Qt::LeftButton) {
switch (m_pressedButton) {
case ResizeButton:
case RotateButton: {
if (m_scaleWidth > 0 && m_scaleHeight > 0) {
QRectF rect(m_applet->boundingRect());
const qreal newWidth = rect.width() * m_scaleWidth;
const qreal newHeight = rect.height() * m_scaleHeight;
m_applet->resetTransform();
m_applet->resize(newWidth, newHeight);
scale(1.0/m_scaleWidth, 1.0/m_scaleHeight);
moveBy((rect.width() - newWidth) / 2, (rect.height() - newHeight) / 2);
m_scaleWidth = m_scaleHeight = 0;
}
QRectF rect = QRectF(m_applet->pos(), m_applet->size());
QPointF center = rect.center();
m_angle += m_tempAngle;
m_tempAngle = 0;
QTransform matrix;
matrix.translate(center.x(), center.y());
matrix.rotateRadians(m_angle);
matrix.translate(-center.x(), -center.y());
setTransform(matrix);
m_applet->update();
break;
}
case ConfigureButton:
//FIXME: Remove this call once the configuration management change was done
if (m_pressedButton == releasedAtButton) {
m_applet->showConfigurationInterface();
}
break;
case RemoveButton:
if (m_pressedButton == releasedAtButton) {
forceDisappear();
m_applet->destroy();
}
break;
case MoveButton: {
if (m_topview) {
m_topview->hide();
delete m_topview;
m_topview = 0;
m_applet->d->ghost = false;
m_applet->update();
}
//find out if we were dropped on a panel or something
if (leaveCurrentView(event->screenPos())) {
startFading(FadeOut, m_entryPos);
Plasma::View *v = Plasma::View::topLevelViewAt(event->screenPos());
if (v && v != m_currentView) {
Containment *c = v->containment();
QPoint pos = v->mapFromGlobal(event->screenPos());
//we actually have been dropped on another containment, so
//move there: we have a screenpos, we need a scenepos
//FIXME how reliable is this transform?
switchContainment(c, v->mapToScene(pos));
}
} else {
// test for containment change
//kDebug() << "testing for containment change, sceneBoundingRect = " << m_containment->sceneBoundingRect();
if (!m_containment->sceneBoundingRect().contains(m_applet->scenePos())) {
// see which containment it belongs to
Corona * corona = qobject_cast<Corona*>(scene());
if (corona) {
QList<Containment*> containments = corona->containments();
for (int i = 0; i < containments.size(); ++i) {
QPointF pos;
QGraphicsView *v;
v = containments[i]->view();
if (v) {
pos = v->mapToScene(v->mapFromGlobal(event->screenPos() - m_mousePos));
if (containments[i]->sceneBoundingRect().contains(pos)) {
//kDebug() << "new containment = " << containments[i];
//kDebug() << "rect = " << containments[i]->sceneBoundingRect();
// add the applet to the new containment and take it from the old one
//kDebug() << "moving to other containment with position" << pos;;
switchContainment(containments[i], pos);
break;
}
}
}
}
}
}
break;
}
default:
break;
}
}
m_pressedButton = NoButton;
update();
}
qreal _k_distanceForPoint(QPointF point)
{
return std::sqrt(point.x()*point.x()+point.y()*point.y());
}
qreal _k_angleForPoints(const QPointF &center, const QPointF &pt1, const QPointF &pt2)
{
QPointF vec1 = pt1 - center;
QPointF vec2 = pt2 - center;
qreal alpha = std::atan2(vec1.y(), vec1.x());
qreal beta = std::atan2(vec2.y(), vec2.x());
return beta - alpha;
}
void AppletHandle::mouseMoveEvent(QGraphicsSceneMouseEvent *event)
{
static const qreal snapAngle = M_PI_2 /* $i 3.14159 / 2.0 */;
if (!m_applet) {
QGraphicsItem::mouseMoveEvent(event);
return;
}
//Track how much the mouse has moved.
QPointF deltaScene = event->scenePos() - event->lastScenePos();
if (m_pressedButton == MoveButton) {
m_pos += deltaScene;
//Are we moving out of the current view?
bool toTopLevel = leaveCurrentView(event->screenPos());
if (!toTopLevel) {
setPos(m_pos);
if (m_topview) {
//We were on a toplevel view, but are moving back on the scene
//again. destroy the toplevel view:
m_topview->hide();
delete m_topview;
m_topview = 0;
m_applet->d->ghost = false;
}
} else {
//set the screenRect correctly. the screenRect contains the bounding
//rect of the applet in screen coordinates. m_mousePos contains the
//position of the mouse relative to the applet, in screen coords.
QRect screenRect = QRect(event->screenPos() - m_mousePos,
m_applet->screenRect().size());
//kDebug() << "screenRect = " << screenRect;
if (!m_topview) { //create a new toplevel view
m_topview = new View(m_containment, -1, 0);
m_topview->setTrackContainmentChanges(false);
m_topview->setWindowFlags(Qt::ToolTip | Qt::FramelessWindowHint
| Qt::WindowStaysOnTopHint);
m_topview->setWallpaperEnabled(false);
m_topview->resize(screenRect.size());
m_topview->setSceneRect(m_applet->sceneBoundingRect());
m_topview->centerOn(m_applet);
//We might have to scale the view, because we might be zoomed out.
qreal scale = screenRect.width() / m_applet->boundingRect().width();
m_topview->scale(scale, scale);
//Paint a mask based on the applets shape.
//TODO: I think it's nicer to have this functionality in Applet.
//TODO: When the corona tiled background is disabled, disable the
//mask when compositing is enabled.
//FIXME: the mask doesn't function correctly when zoomed out.
QBitmap bitmap(screenRect.size());
{
QPainter shapePainter;
shapePainter.begin(&bitmap);
shapePainter.fillRect(0, 0, screenRect.width(),
screenRect.height(),
Qt::white);
shapePainter.setBrush(Qt::black);
shapePainter.drawPath(m_applet->shape());
shapePainter.end();
}
m_topview->setMask(bitmap);
m_topview->show();
m_applet->d->ghost = true;
//TODO: non compositing users are screwed: masking looks terrible.
//Consider always enabling the applet background. Stuff like the analog clock
//looks absolutely terrible when masked, while the minor rounded corners of most
//themes should look quite ok. I said should, since shape() doesn't really
//function correctly right now for applets drawing standard backgrounds.
}
m_topview->setGeometry(screenRect);
}
} else if (m_pressedButton == RotateButton ||
m_pressedButton == ResizeButton) {
if (_k_distanceForPoint(deltaScene) <= 1.0) {
return;
}
QPointF pressPos = mapFromScene(event->buttonDownScenePos(Qt::LeftButton));
QRectF rect = QRectF(m_applet->pos(), m_applet->size());
QPointF center = rect.center();
if (m_pressedButton == RotateButton) {
m_tempAngle = _k_angleForPoints(center, pressPos, event->pos());
if (fabs(remainder(m_angle+m_tempAngle, snapAngle)) < 0.15) {
m_tempAngle = m_tempAngle - remainder(m_angle+m_tempAngle, snapAngle);
}
m_scaleWidth = m_scaleHeight = 1.0;
} else {
qreal w = m_applet->size().width();
qreal h = m_applet->size().height();
QSizeF min = m_applet->minimumSize();
QSizeF max = m_applet->maximumSize();
// If the applet doesn't have a minimum size, calculate based on a
// minimum content area size of 16x16
if (min.isEmpty()) {
min = m_applet->boundingRect().size() - m_applet->boundingRect().size();
min += QSizeF(16, 16);
}
bool ignoreAspectRatio = m_applet->aspectRatioMode() == Plasma::IgnoreAspectRatio;
if (QApplication::keyboardModifiers() & Qt::ControlModifier) {
ignoreAspectRatio = !ignoreAspectRatio;
}
if (ignoreAspectRatio) {
// free resizing
qreal newScaleWidth = 0;
qreal newScaleHeight = 0;
QPointF startDistance(pressPos - center);
QPointF currentDistance(event->pos() - center);
newScaleWidth = currentDistance.x() / startDistance.x();
newScaleHeight = currentDistance.y() / startDistance.y();
if (qAbs(w - (newScaleWidth * w)) <= KGlobalSettings::dndEventDelay()) {
newScaleWidth = 1.0;
}
if (qAbs(h - (newScaleHeight * h)) <= KGlobalSettings::dndEventDelay()) {
newScaleHeight = 1.0;
}
if (newScaleHeight * h < min.height()) {
m_scaleHeight = min.height() / h;
} else if (newScaleHeight * h > max.height()) {
m_scaleHeight = max.height() / h;
} else {
m_scaleHeight = newScaleHeight;
}
if (newScaleWidth * w < min.width()) {
m_scaleWidth = min.width() / w;
} else if (newScaleWidth * w > max.width()) {
m_scaleWidth = max.width() / w;
} else {
m_scaleWidth = newScaleWidth;
}
} else {
// maintain aspect ratio
qreal newScale = 0;
newScale = _k_distanceForPoint(event->pos()-center) / _k_distanceForPoint(pressPos-center);
if (qAbs(h - (newScale * h)) <= KGlobalSettings::dndEventDelay()) {
newScale = 1.0;
}
if (newScale * w < min.width() || newScale * h < min.height()) {
m_scaleWidth = m_scaleHeight = qMax(min.width() / w, min.height() / h);
} else if (newScale * w > max.width() && newScale * h > max.height()) {
m_scaleWidth = m_scaleHeight = qMin(max.width() / w, max.height() / h);
} else {
m_scaleHeight = m_scaleWidth = newScale;
}
}
}
QTransform matrix;
matrix.translate(center.x(), center.y());
matrix.rotateRadians(m_angle+m_tempAngle);
matrix.scale(m_scaleWidth, m_scaleHeight);
matrix.translate(-center.x(), -center.y());
setTransform(matrix);
} else {
QGraphicsItem::mouseMoveEvent(event);
}
}
//pos relative to scene
void AppletHandle::switchContainment(Containment *containment, const QPointF &pos)
{
if (containment->containmentType() != Containment::PanelContainment) {
//FIXME assuming everything else behaves like desktop?
kDebug() << "desktop";
m_containment = containment;
}
Applet *applet = m_applet;
m_applet = 0; //make sure we don't try to act on the applet again
applet->removeSceneEventFilter(this);
forceDisappear(); //takes care of event filter and killing handle
applet->disconnect(this); //make sure the applet doesn't tell us to do anything
applet->setZValue(m_zValue);
containment->addApplet(applet, containment->mapFromScene(pos));
update();
}
QVariant AppletHandle::itemChange(GraphicsItemChange change, const QVariant &value)
{
if (change == ItemPositionHasChanged && m_applet) {
m_applet->updateConstraints(Plasma::LocationConstraint);
}
return QGraphicsItem::itemChange(change, value);
}
void AppletHandle::hoverEnterEvent(QGraphicsSceneHoverEvent *event)
{
Q_UNUSED(event);
//kDebug() << "hover enter";
//if a disappear was scheduled stop the timer
m_leaveTimer->stop();
// if we're already fading out, fade back in
if (m_animId != 0 && m_anim == FadeOut) {
startFading(FadeIn, m_entryPos);
} else {
//schedule appear
m_hoverTimer->start();
}
}
void AppletHandle::hoverMoveEvent(QGraphicsSceneHoverEvent *event)
{
Q_UNUSED(event);
m_leaveTimer->stop();
}
void AppletHandle::hoverLeaveEvent(QGraphicsSceneHoverEvent *event)
{
Q_UNUSED(event);
m_hoverTimer->stop();
if (m_pressedButton != NoButton) {
m_pendingFade = true;
} else {
//wait a moment to hide the handle in order to recheck the mouse position
m_leaveTimer->start();
}
}
bool AppletHandle::sceneEventFilter(QGraphicsItem *watched, QEvent *event)
{
if (watched == m_applet && event->type() == QEvent::GraphicsSceneHoverLeave) {
hoverLeaveEvent(static_cast<QGraphicsSceneHoverEvent*>(event));
}
return false;
}
void AppletHandle::fadeAnimation(qreal progress)
{
qreal endOpacity = (m_anim == FadeIn) ? 1.0 : 0.0;
m_opacity += (endOpacity - m_opacity) * progress;
//kDebug() << "progress" << progress << "m_opacity" << m_opacity << endOpacity;
if (progress >= 1.0) {
m_animId = 0;
delete m_backgroundBuffer;
m_backgroundBuffer = 0;
}
if (progress >= 1.0 && m_anim == FadeOut) {
emit disappearDone(this);
}
update();
}
void AppletHandle::fadeIn()
{
startFading(FadeIn, m_entryPos);
}
void AppletHandle::leaveTimeout()
{
startFading(FadeOut, m_entryPos);
}
void AppletHandle::appletDestroyed()
{
m_applet = 0;
}
void AppletHandle::appletResized()
{
prepareGeometryChange();
calculateSize();
update();
}
void AppletHandle::startFading(FadeType anim, const QPointF &hoverPos)
{
if (m_animId != 0) {
Animator::self()->stopCustomAnimation(m_animId);
}
m_hoverTimer->stop();
m_leaveTimer->stop();
m_entryPos = hoverPos;
qreal time = 250;
if (!m_applet || (anim == FadeOut && m_hoverTimer->isActive())) {
// fading out before we've started fading in
fadeAnimation(1.0);
return;
}
if (anim == FadeIn) {
//kDebug() << m_entryPos.x() << m_applet->pos().x();
prepareGeometryChange();
bool wasOnRight = m_buttonsOnRight;
m_buttonsOnRight = m_entryPos.x() > (m_applet->size().width() / 2);
calculateSize();
QPolygonF region = mapToParent(m_rect).intersected(parentWidget()->boundingRect());
//kDebug() << region << m_rect << mapToParent(m_rect) << parentWidget()->boundingRect();
if (region != mapToParent(m_rect)) {
// switch sides
//kDebug() << "switch sides";
m_buttonsOnRight = !m_buttonsOnRight;
calculateSize();
QPolygonF region2 = mapToParent(m_rect).intersected(parentWidget()->boundingRect());
if (region2 != mapToParent(m_rect)) {
// ok, both sides failed to be perfect... which one is more perfect?
QRectF f1 = region.boundingRect();
QRectF f2 = region2.boundingRect();
//kDebug() << "still not a perfect world" << f2.width() << f2.height() << f1.width() << f1.height();
if ((f2.width() * f2.height()) < (f1.width() * f1.height())) {
//kDebug() << "we did better the first time";
m_buttonsOnRight = !m_buttonsOnRight;
calculateSize();
}
}
}
if (wasOnRight != m_buttonsOnRight && m_anim == FadeIn && anim == FadeIn && m_opacity <= 1) {
m_opacity = 0.0;
}
time *= 1.0 - m_opacity;
} else {
time *= m_opacity;
}
m_anim = anim;
m_animId = Animator::self()->customAnimation(40, (int)time, Animator::EaseInCurve, this, "fadeAnimation");
}
void AppletHandle::forceDisappear()
{
setAcceptsHoverEvents(false);
startFading(FadeOut, m_entryPos);
}
int AppletHandle::minimumHeight()
{
int iconMargin = m_iconSize / 2;
int requiredHeight = iconMargin + //first margin
(m_iconSize + iconMargin ) * 4 + //XXX remember to update this if the number of buttons changes
iconMargin ; //blank space before the close button
if (m_applet && m_applet->hasConfigurationInterface()) {
requiredHeight += (m_iconSize + iconMargin );
}
return requiredHeight;
}
void AppletHandle::calculateSize()
{
KIconLoader *iconLoader = KIconLoader::global();
//m_iconSize = iconLoader->currentSize(KIconLoader::Small); //does not work with double sized icon
m_iconSize = iconLoader->loadIcon("transform-scale", KIconLoader::Small).width(); //workaround
int handleHeight = qMax(minimumHeight(), int(m_applet->contentsRect().height() * 0.8));
int handleWidth = m_iconSize + 2 * HANDLE_MARGIN;
int top = m_applet->contentsRect().top() + (m_applet->contentsRect().height() - handleHeight) / 2.0;
qreal marginLeft, marginTop, marginRight, marginBottom;
m_background->getMargins(marginLeft, marginTop, marginRight, marginBottom);
if (m_buttonsOnRight) {
//put the rect on the right of the applet
m_rect = QRectF(m_applet->size().width(), top, handleWidth, handleHeight);
} else {
//put the rect on the left of the applet
m_rect = QRectF(-handleWidth, top, handleWidth, handleHeight);
}
if (m_applet->contentsRect().height() > qreal(minimumHeight()) * 1.25) {
int addedMargin = marginLeft/2;
if (!m_applet->shape().contains(m_applet->contentsRect())) {
addedMargin = m_applet->contentsRect().width()/2;
}
if (m_buttonsOnRight) {
marginLeft += addedMargin;
} else {
marginRight += addedMargin;
}
}
m_rect = m_applet->mapToParent(m_rect).boundingRect();
m_decorationRect = m_rect.adjusted(-marginLeft, -marginTop, marginRight, marginBottom);
m_totalRect = m_decorationRect.united(m_applet->geometry());
}
} // Plasma Namespace
#include "applethandle_p.moc"
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