Mouse hovering or press event not working?

[wysota]

How about

graphicsView->viewport()->setMouseTracking(true);

graphicsView->viewport()->setMouseTracking(true);

To copy to clipboard, switch view to plain text mode 

?

[qtzcute]

seemed like a life-saver....but it did not work either

[qtzcute]

I used the attached example program where the hovering and mouse press event are working just fine. I copied most of that code but still i am missing something.

[qtzcute]

Just to save your time i thought to paste the finely working code of the example i attached in my last post

mainwindow.cpp

#include "mainwindow.h"
#include "ui_mainwindow.h"
#include "testhoveritem.h"
 
MainWindow::MainWindow(QWidget *parent)
    : QMainWindow(parent), ui(new Ui::MainWindow)
{
    ui->setupUi(this);
    m_scene = new QGraphicsScene(ui->m_graphicsView);
    ui->m_graphicsView->setScene(m_scene);
    QGraphicsItem *item;
    m_scene->addItem(new TestHoverItem());
    m_scene->addItem(item = new TestHoverItem());
    item->setPos(50, 50);
}
 
MainWindow::~MainWindow()
{
    delete ui;
}

#include "mainwindow.h"
#include "ui_mainwindow.h"
#include "testhoveritem.h"

MainWindow::MainWindow(QWidget *parent)
    : QMainWindow(parent), ui(new Ui::MainWindow)
{
    ui->setupUi(this);
    m_scene = new QGraphicsScene(ui->m_graphicsView);
    ui->m_graphicsView->setScene(m_scene);
    QGraphicsItem *item;
    m_scene->addItem(new TestHoverItem());
    m_scene->addItem(item = new TestHoverItem());
    item->setPos(50, 50);
}

MainWindow::~MainWindow()
{
    delete ui;
}

To copy to clipboard, switch view to plain text mode 

testhoveritem.cpp

#include "testhoveritem.h"
#include <QPainter>
#include <QGraphicsSceneHoverEvent>
#include <QStyleOptionGraphicsItem>
#include <QPen>\
#include <QBrush>
 
TestHoverItem::TestHoverItem(QGraphicsItem * parent)
        : QGraphicsItem(parent)
        , m_isHovered(false)
        , m_mouseIsDown(false)
{
    setFlag(QGraphicsItem::ItemIsSelectable);
    setFlag(QGraphicsItem::ItemIsMovable);
    setAcceptHoverEvents(true);
    m_rect = QRect(0, 0, 100, 100);
}
 
void TestHoverItem::hoverEnterEvent(QGraphicsSceneHoverEvent *e)
{
    m_isHovered = true;
    QGraphicsItem::hoverEnterEvent(e);
}
 
void TestHoverItem::hoverLeaveEvent(QGraphicsSceneHoverEvent *e)
{
    m_isHovered = false;
    QGraphicsItem::hoverLeaveEvent(e);
}
 
void TestHoverItem::mousePressEvent(QGraphicsSceneMouseEvent *e)
{
    m_mouseIsDown = true;
    QGraphicsItem::mousePressEvent(e);
    update();
}
 
void TestHoverItem::mouseReleaseEvent(QGraphicsSceneMouseEvent *e)
{
    m_mouseIsDown = false;
    QGraphicsItem::mouseReleaseEvent(e);
    update();
}
 
void TestHoverItem::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget)
{
    QPen pen;
    bool isSelected = (option->state & QStyle::State_Selected) == QStyle::State_Selected;
    pen.setColor(isSelected ? Qt::green : Qt::blue);
    pen.setWidth(5);
    pen.setStyle(m_mouseIsDown ? Qt::DashDotLine : Qt::DotLine);
    painter->setPen(pen);
    painter->setBrush(m_isHovered ? Qt::red : Qt::yellow);
    painter->drawRoundedRect(m_rect, 5, 5);
}
 
QRectF TestHoverItem::boundingRect() const
{
    return QRectF(m_rect).adjusted(-1, -1, 1, 1);
}

#include "testhoveritem.h"
#include <QPainter>
#include <QGraphicsSceneHoverEvent>
#include <QStyleOptionGraphicsItem>
#include <QPen>\
#include <QBrush>

TestHoverItem::TestHoverItem(QGraphicsItem * parent)
        : QGraphicsItem(parent)
        , m_isHovered(false)
        , m_mouseIsDown(false)
{
    setFlag(QGraphicsItem::ItemIsSelectable);
    setFlag(QGraphicsItem::ItemIsMovable);
    setAcceptHoverEvents(true);
    m_rect = QRect(0, 0, 100, 100);
}

void TestHoverItem::hoverEnterEvent(QGraphicsSceneHoverEvent *e)
{
    m_isHovered = true;
    QGraphicsItem::hoverEnterEvent(e);
}

void TestHoverItem::hoverLeaveEvent(QGraphicsSceneHoverEvent *e)
{
    m_isHovered = false;
    QGraphicsItem::hoverLeaveEvent(e);
}

void TestHoverItem::mousePressEvent(QGraphicsSceneMouseEvent *e)
{
    m_mouseIsDown = true;
    QGraphicsItem::mousePressEvent(e);
    update();
}

void TestHoverItem::mouseReleaseEvent(QGraphicsSceneMouseEvent *e)
{
    m_mouseIsDown = false;
    QGraphicsItem::mouseReleaseEvent(e);
    update();
}

void TestHoverItem::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget)
{
    QPen pen;
    bool isSelected = (option->state & QStyle::State_Selected) == QStyle::State_Selected;
    pen.setColor(isSelected ? Qt::green : Qt::blue);
    pen.setWidth(5);
    pen.setStyle(m_mouseIsDown ? Qt::DashDotLine : Qt::DotLine);
    painter->setPen(pen);
    painter->setBrush(m_isHovered ? Qt::red : Qt::yellow);
    painter->drawRoundedRect(m_rect, 5, 5);
}

QRectF TestHoverItem::boundingRect() const
{
    return QRectF(m_rect).adjusted(-1, -1, 1, 1);
}

To copy to clipboard, switch view to plain text mode 

I reused the above code but mine is not working. My code is given in the post dated 13th July 2009 10:18 on this same thread.

Still figuring out what the problem is.

[wysota]

Your shape() implementation is incorrect. Remove (or correct) it and your code will start working.

[qtzcute]

Wysota u rock.

Hovering and mouse press events working now.

Bundle of thanks.

[wysota]

No prob, as always.