sortingbox.cpp Example File
widgets/tooltips/sortingbox.cpp
/****************************************************************************
**
** Copyright (C) 2005-2006 Trolltech AS. All rights reserved.
**
** This file is part of the documentation of the Qt Toolkit.
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** This file may be used under the terms of the GNU General Public
** License version 2.0 as published by the Free Software Foundation
** and appearing in the file LICENSE.GPL included in the packaging of
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#include <QtGui>
#include <stdlib.h>
#include "sortingbox.h"
SortingBox::SortingBox()
{
setAttribute(Qt::WA_StaticContents);
setMouseTracking(true);
setBackgroundRole(QPalette::Base);
itemInMotion = 0;
newCircleButton = createToolButton(tr("New Circle"),
QIcon(":/images/circle.png"),
SLOT(createNewCircle()));
newSquareButton = createToolButton(tr("New Square"),
QIcon(":/images/square.png"),
SLOT(createNewSquare()));
newTriangleButton = createToolButton(tr("New Triangle"),
QIcon(":/images/triangle.png"),
SLOT(createNewTriangle()));
circlePath.addEllipse(QRect(0, 0, 100, 100));
squarePath.addRect(QRect(0, 0, 100, 100));
qreal x = trianglePath.currentPosition().x();
qreal y = trianglePath.currentPosition().y();
trianglePath.moveTo(x + 120 / 2, y);
trianglePath.lineTo(0, 100);
trianglePath.lineTo(120, 100);
trianglePath.lineTo(x + 120 / 2, y);
setWindowTitle(tr("Tooltips"));
resize(500, 300);
createShapeItem(circlePath, tr("Circle"), initialItemPosition(circlePath),
initialItemColor());
createShapeItem(squarePath, tr("Square"), initialItemPosition(squarePath),
initialItemColor());
createShapeItem(trianglePath, tr("Triangle"),
initialItemPosition(trianglePath), initialItemColor());
}
bool SortingBox::event(QEvent *event)
{
if (event->type() == QEvent::ToolTip) {
QHelpEvent *helpEvent = static_cast<QHelpEvent *>(event);
int index = itemAt(helpEvent->pos());
if (index != -1)
QToolTip::showText(helpEvent->globalPos(), shapeItems[index].toolTip());
else
QToolTip::showText(helpEvent->globalPos(), "");
}
return QWidget::event(event);
}
void SortingBox::resizeEvent(QResizeEvent * /* event */)
{
int margin = style()->pixelMetric(QStyle::PM_DefaultTopLevelMargin);
int x = width() - margin;
int y = height() - margin;
y = updateButtonGeometry(newCircleButton, x, y);
y = updateButtonGeometry(newSquareButton, x, y);
updateButtonGeometry(newTriangleButton, x, y);
}
void SortingBox::paintEvent(QPaintEvent * /* event */)
{
QPainter painter(this);
foreach (ShapeItem shapeItem, shapeItems) {
painter.translate(shapeItem.position());
painter.setBrush(shapeItem.color());
painter.drawPath(shapeItem.path());
painter.translate(-shapeItem.position());
}
}
void SortingBox::mousePressEvent(QMouseEvent *event)
{
if (event->button() == Qt::LeftButton) {
int index = itemAt(event->pos());
if (index != -1) {
itemInMotion = &shapeItems[index];
previousPosition = event->pos();
shapeItems.move(index, shapeItems.size() - 1);
update();
}
}
}
void SortingBox::mouseMoveEvent(QMouseEvent *event)
{
if ((event->buttons() & Qt::LeftButton) && itemInMotion)
moveItemTo(event->pos());
}
void SortingBox::mouseReleaseEvent(QMouseEvent *event)
{
if (event->button() == Qt::LeftButton && itemInMotion) {
moveItemTo(event->pos());
itemInMotion = 0;
}
}
void SortingBox::createNewCircle()
{
static int count = 1;
createShapeItem(circlePath, tr("Circle <%1>").arg(++count),
randomItemPosition(), randomItemColor());
}
void SortingBox::createNewSquare()
{
static int count = 1;
createShapeItem(squarePath, tr("Square <%1>").arg(++count),
randomItemPosition(), randomItemColor());
}
void SortingBox::createNewTriangle()
{
static int count = 1;
createShapeItem(trianglePath, tr("Triangle <%1>").arg(++count),
randomItemPosition(), randomItemColor());
}
int SortingBox::itemAt(const QPoint &pos)
{
for (int i = shapeItems.size() - 1; i >= 0; --i) {
const ShapeItem &item = shapeItems[i];
if (item.path().contains(pos - item.position()))
return i;
}
return -1;
}
void SortingBox::moveItemTo(const QPoint &pos)
{
QPoint offset = pos - previousPosition;
itemInMotion->setPosition(itemInMotion->position() + offset);
previousPosition = pos;
update();
}
int SortingBox::updateButtonGeometry(QToolButton *button, int x, int y)
{
QSize size = button->sizeHint();
button->setGeometry(x - size.rwidth(), y - size.rheight(),
size.rwidth(), size.rheight());
return y - size.rheight()
- style()->pixelMetric(QStyle::PM_DefaultLayoutSpacing);
}
void SortingBox::createShapeItem(const QPainterPath &path,
const QString &toolTip, const QPoint &pos,
const QColor &color)
{
ShapeItem shapeItem;
shapeItem.setPath(path);
shapeItem.setToolTip(toolTip);
shapeItem.setPosition(pos);
shapeItem.setColor(color);
shapeItems.append(shapeItem);
update();
}
QToolButton *SortingBox::createToolButton(const QString &toolTip,
const QIcon &icon, const char *member)
{
QToolButton *button = new QToolButton(this);
button->setToolTip(toolTip);
button->setIcon(icon);
button->setIconSize(QSize(32, 32));
connect(button, SIGNAL(clicked()), this, member);
return button;
}
QPoint SortingBox::initialItemPosition(const QPainterPath &path)
{
int x;
int y = (height() - (int)path.controlPointRect().height()) / 2;
if (shapeItems.size() == 0)
x = ((3 * width()) / 2 - (int)path.controlPointRect().width()) / 2;
else
x = (width() / shapeItems.size()
- (int)path.controlPointRect().width()) / 2;
return QPoint(x, y);
}
QPoint SortingBox::randomItemPosition()
{
return QPoint(rand() % (width() - 120), rand() % (height() - 120));
}
QColor SortingBox::initialItemColor()
{
return QColor::fromHsv(((shapeItems.size() + 1) * 85) % 256, 255, 190);
}
QColor SortingBox::randomItemColor()
{
return QColor::fromHsv(rand() % 256, 255, 190);
}
