4. Problem related to clicked signal?

Problem related to clicked signal?


  • While i am pressing a button and releasing it outside the button area how clicked signal is calling its corresponding slot. i mean it should not be called. What may be the wrong in my code.
    @ QObject::connect (button1, SIGNAL(clicked()), &a, SLOT(quit()));@

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  • There's nothing wrong with this connect().

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  • then how i am getting this type of behavior?

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  • Can't say. Got more code to show? The connect statement doesn't influence when signals are emitted, so if you say clicked() is emitted in your situation, there might be some other influence playing part.

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  • The code is following

    @button.cpp

    ofi_vc_gui_button::ofi_vc_gui_button (QWidget *parent):
    QPushButton(parent)
    {
    button_width = 0;

    button_height = 0;

tt_width = 0;

num_of_images = 0;
num_of_states = 0;
m_hovered = false;
m_pressed = false;

link_flag = false;
tt_flag = true;

tm_flag = false;
key_support = false;
is_animate = false;
image_index = 0;
flag = false;
btn_state = false;

memset (button_txt, NULL, OFI_VC_GUI_BTN_MAX_TXT_LEN);

    }

    void ofi_vc_gui_button::create_button (QPixmap &image,QString tool_tip_text,char *btn_txt,bool erase_bkground, QRect rect,
    bool key_supp,
    int num_states)

    {
    pixmap = image;
    button_width = rect.width ();

    button_height = rect.height();

num_of_states = num_states;
num_of_images = pixmap.width()/button_width;

strcpy_s(button_txt, btn_txt);

tt_text = tool_tip_text;

key_support = key_supp;
qDebug ()<<"key support";

create_region ();

target = QRectF(0.0, 0.0, button_width, button_height);
draw_button (OFI_VC_GUI_BTN_STATE_NORMAL);

    }

    void ofi_vc_gui_button::keyPressEvent (QKeyEvent *event)
    {

    if (key_support == true) {

    if (event->key () == Qt::Key_Enter) {

        event->accept ();

        emit clicked();
    } else {

        event->ignore ();
    }
}

    }

    void ofi_vc_gui_button::mousePressEvent (QMouseEvent *e)
    {
    qDebug ()<<"mouse press";
    qDebug ()<<e->globalPos ();

        // Check the button is enabled or not.
    if (this->isEnabled ()) {
        draw_button (OFI_VC_GUI_BTN_STATE_PUSHED);
    }
QPushButton::mousePressEvent (e);

    }

    void ofi_vc_gui_button::mouseMoveEvent (QMouseEvent *e)
    {
    qDebug ()<<this;
    qDebug()<<QApplication::widgetAt (e->globalPos ());
    if (!(QApplication::widgetAt (e->globalPos ()) == this)) {
    qDebug ()<<"mouse move";
    qDebug()<< e->pos ();
    draw_button (OFI_VC_GUI_BTN_STATE_NORMAL);
    }
    QPushButton::mouseMoveEvent (e);
    }

    void ofi_vc_gui_button::mouseReleaseEvent (QMouseEvent *e)
    {
    qDebug()<<e->globalPos ()<<QApplication::widgetAt (e->globalPos ());
    qDebug ()<<"mouse release";

    if (num_of_states == 2) {

    if (flag) {
        draw_button (OFI_VC_GUI_BTN_STATE_NORMAL);
        flag = false;
    } else {
        draw_button (OFI_VC_GUI_BTN_STATE_PUSHED);
        flag = true;
    }
} else {
    draw_button (OFI_VC_GUI_BTN_STATE_HOVER);
}


QPushButton::mouseReleaseEvent (e);

    }

    ofi_vc_gui_button::paintEvent(){
    ..........................

    .................
    }

    main.cpp

    #include <QtGui/QApplication>
    #include "ofi_vc_gui_button.h"

    int main(int argc, char *argv[])
    {
    QApplication a(argc, argv);
    QWidget window;

    int   button_states = 3;
int   tooltip_width = 57;

QRect   rect(20, 30, 47, 51);
QPixmap pixmap(":/images/endcall.png");
char    btn_txt[30] = "";
QColor  col(0, 255, 255);

QString font_type("Calibri");

QString tt_text("normal text");
QString ptt_text("pushed state");
QString dtt_text("disable text");
QString dptt_text("disable pushed");



window.setFocusPolicy (Qt::TabFocus);

bool erase_bkground = false;
ofi_vc_gui_button *button1  = new ofi_vc_gui_button(&window);
button1->create_button (pixmap,
                        tt_text,
                        btn_txt,
                        erase_bkground,
                        rect,
                        false,
                        button_states);

button1->set_link_flag (false);

button1->set_text_color (col);
button1->set_font(font_type);
button1->setGeometry(60, 70, 80, 90);


window.setAttribute (Qt::WA_AlwaysShowToolTips, true);

pixmap.load (":/images/record.png");
rect = QRect(60, 50, 17, 14);
button_states = 3;

ofi_vc_gui_button *button2 = new ofi_vc_gui_button(&window);

button2->create_button (pixmap,
                        tt_text,
                        btn_txt,
                        erase_bkground,
                        rect,
                        button_states);

//button2->activate_tool_tip (false);
button2->setGeometry (180,200,60,70);

button_states = 2;
rect = QRect(100, 150, 17, 16);
ofi_vc_gui_button *button3 = new ofi_vc_gui_button(&window);

pixmap.load (":/images/audio.png");
button3->create_button (pixmap,
                        tt_text,
                        btn_txt,
                        erase_bkground,
                        rect,
                        button_states);

button3->setGeometry (100,150,120,63);
//button3->set_button_state (true);

button2->enable_button (false);


QObject::connect (button1, SIGNAL(clicked()), &a, SLOT(quit()));

qDebug ()<<"key support";

    #if defined(Q_WS_S60)
    window.showMaximized();
    #else
    window.show();
    #endif

    return a.exec&#40;&#41;;

    }

    @

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  • return is handled by the dialog, if the button is a default button.
    event->ignore (); means the button ignores the event and it is propagated to the parent widget.

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