view an image in qt for symbian
I have an application that I implemented, and want to display an image in a widget, but I get an error SIGSEGV, I view it from a directory, but in reality after heave from a buffer not what the problem is I leave my code here:
void Image:: on_pushButton_clicked ()
{
this-> conn-> connect (this-> ui-> lineEdit_2-> text (),
this-> ui-> lineEdit-> text (). Toint ()); QLayout* layout;
QString fileName = QFileDialog:: GetOpenFileName (this,
tr ("Open File"), QDir:: currentPath (),
"files (*. jpg *. png)");
QImage image (fileName);
开发者_C百科 QLabel * label = new QLabel (this);
label-> setPixmap (QPixmap:: FromImage (image));
label-> setScaledContents (true);
layout-> addWidget (label);
label-> show ();
}
I can leave if you want to help my application link for the download thank you very much
thank you very much and I managed to see the image, I want to load from a buffer like this: QBuffer * buffer = new QBuffer (conex); QImage * image = new QImage (); image-> loadFromData (buffer-> buffer ());
I tried this to make my image but I get errors
QBuffer * buffer = new QBuffer (conn);
QImage image = new QImage ();
image-> loadFromData (buffer-> buffer ());
errors are as follows:
C:\ejemplos_qt\teratermobile-build-simulator..\teratermobile\imagen.cpp:81: error: conversion from 'QImage*' to non-scalar type 'QImage' requested
C:\ejemplos_qt\teratermobile-build-simulator..\teratermobile\imagen.cpp:82: error: base operand of '->' has non-pointer type 'QImage'
You didn't initialize your layout
variable before using it with something like this:
layout = new QVBoxLayout(widget); // widget is where you want to put the QLabel
or you can reuse an already created layout.
If you want to show the QLabel
as a top-level window, remove completely the two lines about the layout
.
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