316 lines
8.4 KiB
C++
316 lines
8.4 KiB
C++
/*
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* Copyright 2007 by Kevin Ottens <ervin@kde.org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU Library General Public License as
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* published by the Free Software Foundation; either version 2, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this program; if not, write to the
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* Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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#include "applethandle_p.h"
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#include <QtGui/QGraphicsSceneMouseEvent>
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#include <QtGui/QPainter>
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#include <KIcon>
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#include <cmath>
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#include "containment.h"
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#include "applet.h"
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namespace Plasma
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{
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AppletHandle::AppletHandle(Containment *parent, Applet *applet)
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: QObject(), QGraphicsItem(parent),
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m_buttonsOnRight(false), m_pressedButton(NoButton),
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m_containment(parent), m_applet(applet),
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m_svg("widgets/iconbutton"), m_opacity(0.0),
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m_anim(FadeIn), m_animId(0), m_angle(0.0), m_scale(1.0)
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{
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m_originalMatrix = m_applet->transform();
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m_rect = m_applet->boundingRect();
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m_rect = m_applet->mapToParent(m_rect).boundingRect();
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const int requiredHeight = m_applet->hasConfigurationInterface() ? 158 : 116;
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if (m_rect.height()<requiredHeight) {
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float delta = requiredHeight-m_rect.height();
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delta = delta/2.0;
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if (delta>0.0) {
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m_rect.adjust(0.0, -delta, 0.0, delta);
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}
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}
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m_rect.adjust(-20.0, -20.0, 20.0, 20.0);
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if (m_applet->pos().x()<=60.0) {
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m_rect.adjust(0.0, 0.0, 40.0, 0.0);
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m_buttonsOnRight = true;
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} else {
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m_rect.adjust(-40.0, 0.0, 0.0, 0.0);
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}
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m_applet->setParentItem(this);
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setAcceptsHoverEvents(true);
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startFading(FadeIn);
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}
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AppletHandle::~AppletHandle()
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{
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QPointF center = m_applet->boundingRect().center();
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// TODO: Keep the rotation only, to apply the scaling force
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// a new pixel size to applets (avoid upscaling aliasing, and
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// insane downscaling), probably requires support in the Applet class.
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QTransform matrix = m_originalMatrix;
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matrix.translate(center.x(), center.y());
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matrix.rotateRadians(m_angle);
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matrix.scale(m_scale, m_scale);
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matrix.translate(-center.x(), -center.y());
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QPointF newPos = transform().inverted().map(m_applet->pos());
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m_applet->setParentItem(m_containment);
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m_applet->setPos(mapToParent(newPos));
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m_applet->setTransform(matrix);
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}
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Applet *AppletHandle::applet() const
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{
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return m_applet;
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}
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QRectF Plasma::AppletHandle::boundingRect() const
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{
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return m_rect;
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}
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void AppletHandle::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget)
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{
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Q_UNUSED(option);
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Q_UNUSED(widget);
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painter->save();
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painter->setOpacity(m_opacity);
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m_svg.paint(painter, boundingRect(), "background");
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m_svg.paint(painter, boundingRect(), "foreground-hover");
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QPointF point = m_rect.topLeft();
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if (m_buttonsOnRight) {
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point+= QPointF(m_rect.width()-52.0, 20.0);
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} else {
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point+= QPointF(20.0, 20.0);
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}
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QPointF shiftM;
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QPointF shiftC;
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QPointF shiftD;
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QPointF shiftR;
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switch(m_pressedButton)
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{
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case MoveButton:
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shiftM = QPointF(2, 2);
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break;
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case ConfigureButton:
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shiftC = QPointF(2, 2);
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break;
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case RemoveButton:
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shiftD = QPointF(2, 2);
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break;
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case RotateButton:
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shiftR = QPointF(2, 2);
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break;
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default:
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break;
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}
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painter->drawPixmap(point+shiftM, KIcon("exec").pixmap(32,32)); // FIXME: I'd like a "transform-move" here
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if (m_applet->hasConfigurationInterface()) {
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point+=QPointF(0.0, 42.0);
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painter->drawPixmap(point+shiftC, KIcon("configure").pixmap(32,32));
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}
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point+=QPointF(0.0, 42.0);
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painter->drawPixmap(point+shiftD, KIcon("edit-delete").pixmap(32,32));
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point+=QPointF(0.0, 42.0);
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painter->drawPixmap(point+shiftR, KIcon("transform-rotate").pixmap(32,32));
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painter->restore();
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}
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AppletHandle::ButtonType AppletHandle::mapToButton(const QPointF &point) const
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{
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QPointF basePoint = m_rect.topLeft();
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if (m_buttonsOnRight) {
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basePoint+= QPointF(m_rect.width()-52.0, 20.0);
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} else {
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basePoint+= QPointF(20.0, 20.0);
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}
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QPolygonF activeArea = QPolygonF(QRectF(basePoint, QSizeF(32.0, 32.0)));
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if (activeArea.containsPoint(point, Qt::OddEvenFill)) {
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return MoveButton;
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}
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activeArea.translate(QPointF(0.0, 42.0));
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if (activeArea.containsPoint(point, Qt::OddEvenFill)
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&& m_applet->hasConfigurationInterface()) {
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return ConfigureButton;
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}
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activeArea.translate(QPointF(0.0, 42.0));
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if (activeArea.containsPoint(point, Qt::OddEvenFill)) {
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return RemoveButton;
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}
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activeArea.translate(QPointF(0.0, 42.0));
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if (activeArea.containsPoint(point, Qt::OddEvenFill)) {
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return RotateButton;
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}
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return NoButton;
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}
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void AppletHandle::mousePressEvent(QGraphicsSceneMouseEvent *event)
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{
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if (event->button()==Qt::LeftButton) {
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m_pressedButton = mapToButton(event->pos());
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update();
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}
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}
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void AppletHandle::mouseReleaseEvent(QGraphicsSceneMouseEvent *event)
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{
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ButtonType releasedAtButton = mapToButton(event->pos());
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if (event->button()==Qt::LeftButton && m_pressedButton==releasedAtButton) {
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if (m_pressedButton==ConfigureButton) {
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m_applet->showConfigurationInterface();
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} else if (m_pressedButton==RemoveButton) {
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Phase::self()->animateItem(m_applet, Phase::Disappear);
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forceDisappear();
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}
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}
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m_pressedButton = NoButton;
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update();
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}
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qreal _k_distanceForPoint(QPointF point)
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{
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return ::sqrt(point.x()*point.x()+point.y()*point.y());
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}
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qreal _k_angleForPoints(const QPointF ¢er, const QPointF &pt1, const QPointF &pt2)
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{
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QPointF vec1 = pt1 - center;
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QPointF vec2 = pt2 - center;
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qreal alpha = ::atan2(vec1.y(), vec1.x());
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qreal beta = ::atan2(vec2.y(), vec2.x());
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return beta - alpha;
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}
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void AppletHandle::mouseMoveEvent(QGraphicsSceneMouseEvent *event)
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{
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if (m_pressedButton==MoveButton) {
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QPointF delta = event->pos()-event->lastPos();
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setPos(pos()+delta);
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} else if (m_pressedButton==RotateButton) {
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if (_k_distanceForPoint(event->pos()-event->lastPos()) <= 1.0) {
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return;
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}
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QPointF pressPos = mapFromScene(event->buttonDownScenePos(Qt::LeftButton));
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QRectF rect = QRectF(m_applet->pos(), m_applet->size());
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QPointF center = rect.center();
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m_angle = _k_angleForPoints(center, pressPos, event->pos());
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m_scale = _k_distanceForPoint(event->pos()-center) / _k_distanceForPoint(pressPos-center);
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QTransform matrix;
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matrix.translate(center.x(), center.y());
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matrix.rotateRadians(m_angle);
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matrix.scale(m_scale, m_scale);
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matrix.translate(-center.x(), -center.y());
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setTransform(matrix);
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} else {
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QGraphicsItem::mouseMoveEvent(event);
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}
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}
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void AppletHandle::hoverEnterEvent(QGraphicsSceneHoverEvent *event)
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{
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Q_UNUSED(event);
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startFading(FadeIn);
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}
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void AppletHandle::hoverLeaveEvent(QGraphicsSceneHoverEvent *event)
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{
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Q_UNUSED(event);
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startFading(FadeOut);
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}
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void AppletHandle::fadeAnimation(qreal progress)
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{
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qreal endOpacity = 1.0;
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if (m_anim==FadeOut) {
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endOpacity = 0.0;
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}
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m_opacity += (endOpacity-m_opacity)*progress;
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if (progress>=1.0 && m_anim==FadeOut) {
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emit disappearDone(this);
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}
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update();
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}
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void AppletHandle::startFading(FadeType anim)
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{
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if (m_animId!=0) {
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Phase::self()->stopCustomAnimation(m_animId);
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}
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qreal time = 500;
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if (anim==FadeIn) {
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time *= 1.0-m_opacity;
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} else {
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time *= m_opacity;
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}
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m_anim = anim;
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m_animId = Phase::self()->customAnimation(40, (int)time,
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Phase::EaseInOutCurve,
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this, "fadeAnimation");
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}
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void AppletHandle::forceDisappear()
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{
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setAcceptsHoverEvents(false);
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startFading(FadeOut);
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}
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}
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#include "applethandle_p.moc"
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