plasma-framework/desktoptoolbox.cpp
Aaron J. Seigo 9df86adbd2 * hide items that are disabled while they are shown
* enforce a 100ms delay between showing/hiding which helps reduce the jitters

svn path=/trunk/KDE/kdebase/workspace/libs/plasma/; revision=768453
2008-01-30 03:40:17 +00:00

348 lines
9.2 KiB
C++

/*
* Copyright 2007 by Aaron Seigo <aseigo@kde.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU Library General Public License as
* published by the Free Software Foundation; either version 2, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details
*
* You should have received a copy of the GNU Library General Public
* License along with this program; if not, write to the
* Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#include "desktoptoolbox_p.h"
#include <QGraphicsSceneHoverEvent>
#include <QPainter>
#include <QRadialGradient>
#include <plasma/theme.h>
#include <KColorScheme>
#include <KDebug>
#include "widgets/widget.h"
namespace Plasma
{
class EmptyGraphicsItem : public QGraphicsItem
{
public:
EmptyGraphicsItem(QGraphicsItem *parent)
: QGraphicsItem(parent)
{
setAcceptsHoverEvents(true);
}
QRectF boundingRect() const
{
return QRectF(QPointF(0, 0), m_rect.size());
}
QRectF rect() const
{
return m_rect;
}
void setRect(const QRectF &rect)
{
//kDebug() << "setting rect to" << rect;
prepareGeometryChange();
m_rect = rect;
setPos(rect.topLeft());
}
void paint(QPainter * p, const QStyleOptionGraphicsItem*, QWidget*)
{
Q_UNUSED(p)
//p->setPen(Qt::red);
//p->drawRect(boundingRect());
}
private:
QRectF m_rect;
};
// used with QGrahphicsItem::setData
static const int ToolName = 7001;
DesktopToolbox::DesktopToolbox(QGraphicsItem *parent)
: QGraphicsItem(parent),
m_icon("plasma"),
m_toolBacker(0),
m_size(50),
m_showing(false),
m_animId(0),
m_animFrame(0)
{
setAcceptsHoverEvents(true);
setZValue(10000);
setFlag(ItemClipsToShape, true);
setFlag(ItemClipsChildrenToShape, false);
connect(Plasma::Phase::self(), SIGNAL(movementComplete(QGraphicsItem*)), this, SLOT(toolMoved(QGraphicsItem*)));
}
/*QRectF DesktopToolbox::sizeHint() const
{
return boundingRect();
}*/
QRectF DesktopToolbox::boundingRect() const
{
return QRectF(0, 0, m_size*2, m_size*2);
}
void DesktopToolbox::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget)
{
Q_UNUSED(option)
Q_UNUSED(widget)
QColor color1 = KColorScheme(QPalette::Active, KColorScheme::Window,
Plasma::Theme::self()->colors()).background().color();
color1.setAlpha(64);
QColor color2 = KColorScheme(QPalette::Active, KColorScheme::Window,
Plasma::Theme::self()->colors()).foreground().color();
color2.setAlpha(64);
QPainterPath p = shape();
QRadialGradient gradient(QPoint(m_size*2, 0), m_size + m_animFrame);
gradient.setFocalPoint(QPointF(m_size*2, 0));
gradient.setColorAt(0, color1);
gradient.setColorAt(.87, color1);
gradient.setColorAt(.97, color2);
color2.setAlpha(0);
gradient.setColorAt(1, color2);
painter->save();
painter->setPen(Qt::NoPen);
painter->setRenderHint(QPainter::Antialiasing, true);
painter->setBrush(gradient);
painter->drawPath(p);
painter->restore();
const qreal progress = m_animFrame / m_size;
if (progress <= 0.9) {
m_icon.paint(painter, QRect(m_size*2 - 34, 2, 32, 32), Qt::AlignCenter, QIcon::Disabled, QIcon::Off);
}
if (progress > 0.1) {
painter->save();
painter->setOpacity(progress);
m_icon.paint(painter, QRect(m_size*2 - 34, 2, 32, 32));
painter->restore();
}
}
QPainterPath DesktopToolbox::shape() const
{
QPainterPath path;
int size = m_size + (int)m_animFrame;
path.moveTo(m_size*2, 0);
path.arcTo(QRectF(m_size*2 - size, -size, size*2, size*2), 180, 90);
return path;
}
void DesktopToolbox::hoverEnterEvent(QGraphicsSceneHoverEvent *event)
{
if (m_showing || m_stopwatch.elapsed() < 100) {
QGraphicsItem::hoverEnterEvent(event);
return;
}
showToolbox();
QGraphicsItem::hoverEnterEvent(event);
}
void DesktopToolbox::showToolbox()
{
if (m_showing) {
return;
}
int maxwidth = 0;
foreach (QGraphicsItem* tool, QGraphicsItem::children()) {
if (!tool->isEnabled()) {
continue;
}
maxwidth = qMax(static_cast<int>(tool->boundingRect().width()), maxwidth);
}
// put tools 5px from icon edge
const int iconWidth = 32;
int x = m_size*2 - maxwidth - iconWidth - 5;
int y = 5; // pos().y();
Plasma::Phase* phase = Plasma::Phase::self();
foreach (QGraphicsItem* tool, QGraphicsItem::children()) {
if (tool == m_toolBacker) {
continue;
}
if (!tool->isEnabled()) {
if (tool->isVisible()) {
const int height = static_cast<int>(tool->boundingRect().height());
phase->moveItem(tool, Plasma::Phase::SlideOut, QPoint(m_size * 2, -height));
}
continue;
}
//kDebug() << "let's show and move" << tool << tool->boundingRect();
tool->show();
phase->moveItem(tool, Plasma::Phase::SlideIn, QPoint(x, y));
//x += 0;
y += static_cast<int>(tool->boundingRect().height()) + 5;
}
if (!m_toolBacker) {
m_toolBacker = new EmptyGraphicsItem(this);
}
m_toolBacker->setRect(QRectF(QPointF(x, 0), QSizeF(maxwidth, y - 10)));
m_toolBacker->show();
if (m_animId) {
phase->stopCustomAnimation(m_animId);
}
m_showing = true;
// TODO: 10 and 200 shouldn't be hardcoded here. There needs to be a way to
// match whatever the time is that moveItem() takes. Same in hoverLeaveEvent().
m_animId = phase->customAnimation(10, 240, Plasma::Phase::EaseInCurve, this, "animate");
m_stopwatch.restart();
}
void DesktopToolbox::hoverLeaveEvent(QGraphicsSceneHoverEvent *event)
{
//kDebug() << event->pos() << event->scenePos() << m_toolBacker->rect().contains(event->scenePos().toPoint());
if ((m_toolBacker && m_toolBacker->rect().contains(event->scenePos().toPoint())) ||
m_stopwatch.elapsed() < 100) {
QGraphicsItem::hoverLeaveEvent(event);
return;
}
hideToolbox();
QGraphicsItem::hoverLeaveEvent(event);
}
void DesktopToolbox::hideToolbox()
{
if (!m_showing) {
return;
}
int x = m_size * 2;
int y = 0;
Plasma::Phase* phase = Plasma::Phase::self();
foreach (QGraphicsItem* tool, QGraphicsItem::children()) {
if (tool == m_toolBacker) {
continue;
}
const int height = static_cast<int>(tool->boundingRect().height());
phase->moveItem(tool, Plasma::Phase::SlideOut, QPoint(x, y-height));
}
if (m_animId) {
phase->stopCustomAnimation(m_animId);
}
m_showing = false;
m_animId = phase->customAnimation(10, 240, Plasma::Phase::EaseOutCurve, this, "animate");
if (m_toolBacker) {
m_toolBacker->hide();
}
m_stopwatch.restart();
}
void DesktopToolbox::animate(qreal progress)
{
if (m_showing) {
m_animFrame = m_size * progress;
} else {
m_animFrame = m_size * (1.0 - progress);
}
//kDebug() << "animating at" << progress << "for" << m_animFrame;
if (progress >= 1) {
m_animId = 0;
}
update();
}
void DesktopToolbox::toolMoved(QGraphicsItem *item)
{
//kDebug() << "geometry is now " << static_cast<Plasma::Widget*>(item)->geometry();
if (!m_showing &&
QGraphicsItem::children().indexOf(static_cast<Plasma::Widget*>(item)) != -1) {
item->hide();
}
}
void DesktopToolbox::addTool(QGraphicsItem *tool, const QString &name)
{
if (!tool) {
return;
}
tool->hide();
const int height = static_cast<int>(tool->boundingRect().height());
tool->setPos(QPoint(m_size*2,-height));
tool->setZValue(zValue() + 1);
tool->setParentItem(this);
tool->setData(ToolName, name);
}
void DesktopToolbox::enableTool(const QString &toolName, bool visible)
{
//kDebug() << (visible? "enabling" : "disabling") << "tool" << toolName;
QGraphicsItem *t = tool(toolName);
if (t && t->isEnabled() != visible) {
t->setEnabled(visible);
// adjust the visible items
if (m_showing) {
m_showing = false;
showToolbox();
}
}
}
bool DesktopToolbox::isToolEnabled(const QString &toolName) const
{
QGraphicsItem *t = tool(toolName);
if (t) {
return t->isEnabled();
}
return false;
}
QGraphicsItem* DesktopToolbox::tool(const QString &toolName) const
{
foreach (QGraphicsItem *child, QGraphicsItem::children()) {
//kDebug() << "checking tool" << child << child->data(ToolName);
if (child->data(ToolName).toString() == toolName) {
//kDebug() << "tool found!";
return child;
}
}
return 0;
}
} // plasma namespace
#include "desktoptoolbox_p.moc"