Connect clicked() signal of PushButton to a slot void(int)
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Hi,
I need to do something like this:
@
QObject::connect(CardMat[i].ibutton, SIGNAL(clicked()), this, SLOT(Modifica(i)));
@i is an index in a for loop, i want each button in CardMat[] call slot "Modifica(int)" whit a different integer parameter (index i)
How can i do this?
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[[Doc:QSignalMapper]] comes into mind.
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i don't understand what i have to do sorry
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In the worst case you can define your own signals and slots.
In your widget's class, define a slot like that:
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public slots:
void getButtonClicked();
@and in the implementation call that function
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void widget::getButtonClicked()
{
Modifica(i);
}
@and do the connection to that slot.
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[quote author="WellSaid" date="1329316504"]i don't understand what i have to do sorry[/quote]
The docs have an example. You will just need to replace the QStrings they use with ints. The respective methods are there.
Otherwise, have a look at the "tag search":/search/tag/qsignalmapper please, there have been posted some examples previously.
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I try:
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connect(CardMat[i].ibutton, SIGNAL(clicked()), this, SLOT(map()));
signalMapper -> setMapping(CardMat[i].ibutton, i);
connect(signalMapper, SIGNAL(mapped(int)), this, SIGNAL(clicked(int)));
@but now? where i have to write the code of my slot?
EDIT: This code give some errors
EDIT 2: I solved in this way:
- In constructor set the ObjectName of each button, like this:
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for(int i = 0; i < 16; i++){
CardMat[i].ibutton = new QPushButton(this);
char name[7];
sprintf(name, "%d_card", i);
CardMat[i].ibutton -> setObjectName(QString::fromAscii(name));
...
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So now the first char of the name of each button is the number in the matrix CardMat[].
Then in the "Modfica()" slot, to obtain the number of the sender object, i do this:
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void PlayForm::Modifica(){
//Ottengo il numero della carta che ha chiamato Modifica()
char* str = sender()->objectName().toAscii().data();
int i = 0;
for(int c = 0; c < strlen(str) && str[c] != '_'; c++){
i += (str[c] -'0');
i *= 10;
}
i /= 10;
//--------------------------------------------------------}
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- In constructor set the ObjectName of each button, like this:
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You are supposed to adapt the code, not copy it char to char and do a replace "QString" with "int"....
You should connect the mapped() signal to a slot of your class, not (probably non-existent) signal (Hint add an argument to your Modifica slot!). You get the number of the clicked button in the slot for free.
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Hi, There is a small change in the above mentioned problem. I am writing the connect signal and slot in main.cpp file.
What are the slots that i can use from here. Can I incude a new class object and call a slot of that class
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Hi, There is a small change in the above mentioned problem. I am writing the connect signal and slot in main.cpp file.
What are the slots that i can use from here. Can I incude a new class object and call a slot of that class
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I think a QButtonGroup would work well for what you want to do. Add all your buttons to a button group and connect the button group's buttonClicked(int id) signal to your slot. You need to include unique id (integer) when adding each of your buttons to the group.
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I think a QButtonGroup would work well for what you want to do. Add all your buttons to a button group and connect the button group's buttonClicked(int id) signal to your slot. You need to include unique id (integer) when adding each of your buttons to the group.
