help needed in QMouseEvent

[aj2903]

i have lineEdit control & 2 Button i.e Enter and Clear
When the User Presses Clear Button for 4 sec or more the text in the lineEdit should be cleared.

I'm not able to capture the pressEvent on the clear button.
Help Needed.

[spirit]

why do you use events? QPushButton has signal clicked. you can try to use in.

[Lykurg]

Why ever you want to force the user to press a button 4 seconds, simply subclass QPushButton an implement QWidget::mousePressEvent ( QMouseEvent * event ). (and of course QWidget::mouseReleaseEvent ( QMouseEvent * event ) to measure the time)

Lykurg

[talk2amulya]

here is how u do it buddy:

first use setMouseTracking(true) for your button class. start a timer when the mousePressEvent comes. set a timeout for 4 seconds on the timer and on slot for timeout(), u can clear the text

void YourButtonClass::mousePressEvent(QMouseEvent* event)
{

if (event->button() == Qt::LeftButton)
{
Timer->start(m_sec);
m_bMouseButtonDown = true;
}

}

void CAutoRepeatButton::mouseReleaseEvent(QMouseEvent* event)
{

if (event->button() == Qt::LeftButton)
{
m_pAutoRepeatTimer->stop();
m_bMouseButtonDown = false;

if (m_pAutoRepeatTimer->interval() == urInterval)
{
urSlot();
}
}
}

this should solve ur problem

[aj2903]

thanks to all for quick reply.

hi talk2amulya,
i'm using simple QPushButton,i have one problem, in your code :

void YourButtonClass::mousePressEvent(QMouseEvent* event)
{
 
if (event->button() == Qt::LeftButton)
{
Timer->start(m_sec);
m_bMouseButtonDown = true;
}

void YourButtonClass::mousePressEvent(QMouseEvent* event)
{

if (event->button() == Qt::LeftButton)
{
Timer->start(m_sec);
m_bMouseButtonDown = true;
}

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how can i replace YourButtonClass with QPushButton?
is it possible?

[spirit]

install event filter for you button.

...
m_pb = new QPushButton(tr("Clear"), this);
m_pb->installEventFilter(this);
...
bool MyWidget::eventFilter(QObject *o, QEvent e)
{
   if (o == m_pb && e->type() == QEvent::QEvent::MouseButtonPress) {
     QMouseEvent *me = static_cast<QMouseEvent *>(e);
    if (e->button() == Qt::LeftButton) {
              Timer->start(m_sec);
              m_bMouseButtonDown = true;
              return true;
    }
  }
  return QWidget::eventFilter(o, e);
}

...
m_pb = new QPushButton(tr("Clear"), this);
m_pb->installEventFilter(this);
...
bool MyWidget::eventFilter(QObject *o, QEvent e)
{
   if (o == m_pb && e->type() == QEvent::QEvent::MouseButtonPress) {
     QMouseEvent *me = static_cast<QMouseEvent *>(e);
    if (e->button() == Qt::LeftButton) {
              Timer->start(m_sec);
              m_bMouseButtonDown = true;
              return true;
    }
  }
  return QWidget::eventFilter(o, e);
}

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[aj2903]

hi spirit

i have written the code in following manner :


abc.h
class abcublic QDialog,public QObject
{

protected :
                 bool eventFilter(QObject *o,QEvent *e):

protected :
                 bool eventFilter(QObject *o,QEvent *e):

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}

I'm facing the following error:
abc.h:70: error: only constructors take base initializers

I don't know what the problem is ?
Kindly correct me where i'm going wrong

Thanks in Advanced

[spirit]

Qt doesnt support multiply inheritance from QObject, so you have to correct your code like this

class YourDialog: public QDialog
{
...
protected:
...
}

class YourDialog: public QDialog
{
...
protected:
...
}

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[aj2903]

after trying

class YourDialog: public QDialog
{
...
protected:
...
}

class YourDialog: public QDialog
{
...
protected:
...
}

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same error is occuring

[spirit]

show whole header file, plz.

[aj2903]

Here is the Header File

#ifndef ABC_H
#define ABC_H
 
#include <QDialog>
#include <QTimer>
#include <QMouseEvent>
 
class abc: public QDialog
{
    Q_OBJECT
 
public:
		abc(QWidget *parent = 0);
		~abc;
public slots:
		void log_data_refresh();
protected:
		void mousePressEvent(QMouseEvent *event);
		void mouseReleaseEvent(QMouseEvent *event);
		bool eventFilter(QObject *obj,QEvent *event):
 
private slots:
         ...
	void check_queue();
	void closeEvent(QCloseEvent *event);
	void showEvent(QShowEvent *event);
 
private:
		QTimer *timer;
};
 
#endif

#ifndef ABC_H
#define ABC_H

#include <QDialog>
#include <QTimer>
#include <QMouseEvent>

class abc: public QDialog
{
    Q_OBJECT

public:
		abc(QWidget *parent = 0);
		~abc;
public slots:
		void log_data_refresh();
protected:
		void mousePressEvent(QMouseEvent *event);
		void mouseReleaseEvent(QMouseEvent *event);
		bool eventFilter(QObject *obj,QEvent *event):

private slots:
         ...
	void check_queue();
	void closeEvent(QCloseEvent *event);
	void showEvent(QShowEvent *event);

private:
		QTimer *timer;
};

#endif

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[spirit]

try to change ~abc; to ~abc();