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[SOLVED] Label overflow?
Currently there happend something strange while I created a new class. There I added to the Header 3 QLabel's and a QGridLayout like this:
QLabel *first; QLabel *second; QLabel *third; QGridLayout *gridLayout;@
Then I instance and added them in the source file to the layout, like:
first = new QLabel("first");
second = new QLabel("second");
third = new QLabel("third");
gridLayout = new QGridLayout; gridLayout->addWidget(first, 0, 0); gridLayout->addWidget(second, 1, 0); gridLayout->addWidget(third, 2, 0); setLayout(gridLayout);@
Then I creat from this class a Widget in the QMainWindow. Now, as I set this Widget show(), I get a runtime error. Curiously to say, if I add just two Labels, it works, from three Labels on I get this error. The other part is, if I define the QLabel's direclty in the source file like @QLabel *first = New QLabel("first")@ it works as well, what could cause this?
tdmatsu last edited by
I don't see any problems in your code. Could you elaborate this part a little bit?
[quote author="luggi" date="1306942242"]
Then I creat from this class a Widget in the QMainWindow. Now, as I set this Widget show(), I get a runtime error.
How are you using the widget in QMainWindow? What is the error message?
andre last edited by
Just a guess: perhaps you should set the size of the grid to be big enough so you actually have 3 columns?
The widget is used in the QMainWindow like this.
In the header:
In the source file:
@ myWidget = new myWidget;
connect(aPushButton, SIGNAL(clicked()), myWidget, SLOT(show()));@
Everytime I click on this Button, the application freezes totally and Windows 7 is searching for a solution of this problem. The Qt Creator gives me the exit code -1073741819. I was searching a bit around this code and found something about access violation in windows.
@Andre: How can I set the size of the grid? I just found to set the height or width of a row or column.
Chuck Gao last edited by
Maybe error occurs in another place :)
The grid will resize automatically by itself. So you don't need to worry about it.
Okey, there are some news. If I set this class in the QMainWindow public like
MainWindow(QWidget *parent = 0);
then it works. But I don't get why I get problems if the class is private?
Now it's time to close this thread, as I set the class back to private, just to try it a second time which I think is still necessary in windows, it worked! :-/