Detecting what mouse-button is pressed on a icon-button (CPP)

UIUser

I made a method that depended on two different buttons on a 'speed-bar' (bar with clickable-buttons)

//1. button
QAction* strumNotesUpAction =
new QAction(embed::getIconPixmap( "strumUp" ), 
tr( "Strum Selected by Q-value" ), this );
connect( strumNotesUpAction, SIGNAL( triggered() ), 
m_editor, SLOT( strumNotesUp() ) );
    
//2. button
QAction* strumNotesDnAction =
new QAction(embed::getIconPixmap( "strumDwn" ), 
tr( "Strum Selected by Q-value" ), this );
connect( strumNotesDnAction, SIGNAL( triggered() ), 
m_editor, SLOT( strumNotesDn() ) );

//add physical buttons for each of the defined QActions
    notesActionsToolBar->addAction( strumNotesUpAction );
    notesActionsToolBar->addAction( strumNotesDnAction );

This works, but is not optimized.
I need to only use one button, and split the button-function between left-click and right-click

I searched in the examples and i found

template <typename Functor> QAction *QMenu::addAction(
         const QIcon &icon, 
         const QString &text, Functor functor, 
         const QKeySequence &shortcut = 0)

But that is for a key-board shortcut for the action. I need to catch the mouse-button (left/right) that is being pressed

Something like:

//button
QAction* strumNotesAction =
new QAction(embed::getIconPixmap( "strum" ), tr( "Strum Selected by Q-value" ), <MouseButtonPressed lft| rgt >, this);

Then i need to do a specified action depending on whitch mouse-button was pressed

if (???<left-mouse-signal>???) connect( strumNotesAction, SIGNAL( triggered() ), m_editor, SLOT( strumNotes( true) ) )
else connect( strumNotesAction, SIGNAL( triggered() ), 
m_editor, SLOT( strumNotes( false ) ) );

Where void strumNotes(bool bb) does the actual 'work' depending on mouse-button used.
I wonder if

triggered()

could be where the mouse-button is registered, but searching gives
About 7,350 results (0.23 seconds)
That is not possible to get an overview from..

How can left and right-mouse button do two different actions through different parameters in the function-call?

Christian Ehrlicher

Use QToolBar::addWidget() and pass your custom widget derived from QToolButton to it. In this class you can override the mousePressEvent for your needs.

UIUser

@Christian-Ehrlicher Thanks Christian, but my toolbar is not a QToolBar, it just a row of buttons. I need to use that button, eg the type that is implemented as
QAction*
but that
QAction(embed::getIconPixmap(...)
has to react depending on weather left or right mouse-button is pressed.
It has to be a QAction!
All other neighbouring buttons are this kind.
The UI must remain consistent!

ChrisW67

I need to use that button, eg the type that is implemented as QAction*

A QAction is not a button, or a UI widget of any sort. It is an abstract representation of something that occurs when triggered. You either trigger it, or not.

A QAction in a QToolbar creates a button-per-action to trigger the action. In a QMenu it is a menu entry per action.

The non-standard UI you are describing is the equivalent of a single QToolButton with two associated QActions, one for up and one for down, and peculiar way of triggering them.

but my toolbar is not a QToolBar, it just a row of buttons

Excellent. You have total control of the widgets in your "tool" bar. So, do what @Christian-Ehrlicher suggested and insert a customised version of whatever widget the other buttons you are creating are. This presumably happens inside your notesActionsToolBar->addAction() function.

Here is an example:

#ifndef DUALACTIONPUSHBUTTON_H
#define DUALACTIONPUSHBUTTON_H

#include <QPushButton>


class DualActionPushButton: public QPushButton
{
    Q_OBJECT
public:
    explicit DualActionPushButton(QWidget *p = nullptr);
    ~DualActionPushButton();
protected:
    void mousePressEvent(QMouseEvent *event);

};

#endif // DUALACTIONPUSHBUTTON_H

#include <QMouseEvent>
#include <QDebug>

DualActionPushButton::DualActionPushButton(QWidget *p):
    QPushButton(p)
{ }

DualActionPushButton::~DualActionPushButton()
{ }

void DualActionPushButton::mousePressEvent(QMouseEvent *event)
{
    if (event->button() == Qt::LeftButton) {
        qDebug() << "Left";
        // trigger the first action in the button's action list (if there is one).
        QList<QAction*> acts = this->actions();
        if (acts.count() > 0) {
            acts.at(0)->trigger();
            event->accept();
        }
    }

    else if (event->button() == Qt::RightButton) {
        qDebug() << "Right";
        // trigger the second action in the button's action list (if there is one)
        QList<QAction*> acts = this->actions();
        if (acts.count() > 1) {
            acts.at(1)->trigger();
            event->accept();
        }
    }
    // Ignore other options
    event->ignore();
}

and the setup

    QAction* strumNotesUpAction =
    new QAction(tr( "Strum Selected by Q-value" ), this );
    connect( strumNotesUpAction, &QAction::triggered,
             [=]() { qDebug() << "strumUp triggered"; } );

    //2. button
    QAction* strumNotesDnAction =
    new QAction(tr( "Strum Selected by Q-value" ), this );
    connect( strumNotesDnAction, &QAction::triggered,
             [=]() { qDebug() << "strumDwn triggered"; } );

    QPushButton *pushButton m= new DualActionPushButton(this);
    pushButton->addAction(strumNotesUpAction);
    pushButton->addAction(strumNotesDnAction);
    // insert into your tool bar

UIUser

@ChrisW67 I cant thank you enough!
So kind of you to not only explain what i have to do, but to make an example!
That is SO kind!
Thank you so much. Really Appreciated!

Christian Ehrlicher

@UIUser said in Detecting what mouse-button is pressed on a icon-button (CPP):

but to make an example!

Wouldn't this be a task of you? I mean - copy'n'pasting some code together is not something you should be proud of...

UIUser

@Christian-Ehrlicher

-Everyone has to learn how to, before they can do.
Your opinion is noted, but good examples are often how creative thinking has to start.
That is my pow.
If i know, i share.