Qt/Widgets/FileDialogDefaultSuffix

FileDialogDefaultSuffix.cpp

#include <QApplication>
 
#include "form.h"
 
int main(int argc, char *argv[])
{
    QApplication app(argc, argv);
    Form myForm;
    myForm.show();
    return app.exec();
}

form.cpp

#include <QtGui>
 
#include "form.h"
 
#include <iostream>
#include <string>
 
#include <QFileDialog>
#include <QString>
 
Form::Form(QWidget* parent)
    : QWidget(parent)
{
    setupUi(this);
}
 
void Form::on_btnSave_clicked()
{
#include <QtGui>
 
#include "form.h"
 
#include <iostream>
#include <string>
 
#include <QFileDialog>
#include <QString>
 
Form::Form(QWidget* parent)
    : QWidget(parent)
{
    setupUi(this);
}
 
void Form::on_btnSave_clicked()
{
  /*
  // This doesn't work because it still calls the static getSaveFileName
  QFileDialog dialog(this);
  //dialog.setFilter(".png .bmp");
  dialog.setNameFilter("*.png;;*.bmp");
  dialog.setDefaultSuffix("png");
  QString fileName = dialog.getSaveFileName();
  */
 
  QFileDialog dialog(this);
  dialog.setNameFilter("*.png;;*.bmp");
  dialog.setDefaultSuffix("png");
 
  dialog.exec();
 
  QString fileName = dialog.selectedFiles()[0];
 
  std::cout << "Set save filename: " << fileName.toStdString() << std::endl;
}

form.h

#ifndef FORM_H
#define FORM_H
 
#include <QWidget>
 
#include "ui_form.h"
 
class Form : public QWidget, private Ui::Form
{
    Q_OBJECT
 
public:
    Form(QWidget *parent = 0);
 
private slots:
    void on_btnSave_clicked();
 
};
 
#endif

form.ui

<?xml version="1.0" encoding="UTF-8"?>
<ui version="4.0">
 <class>Form</class>
 <widget class="QWidget" name="Form">
  <property name="geometry">
   <rect>
    <x>0</x>
    <y>0</y>
    <width>400</width>
    <height>300</height>
   </rect>
  </property>
  <property name="windowTitle">
   <string>Form</string>
  </property>
  <widget class="QPushButton" name="btnOpenFile">
   <property name="geometry">
    <rect>
     <x>40</x>
     <y>90</y>
     <width>91</width>
     <height>27</height>
    </rect>
   </property>
   <property name="text">
    <string>Open File</string>
   </property>
  </widget>
  <widget class="QPushButton" name="btnOpenDirectory">
   <property name="geometry">
    <rect>
     <x>170</x>
     <y>90</y>
     <width>181</width>
     <height>27</height>
    </rect>
   </property>
   <property name="text">
    <string>Open Directory</string>
   </property>
  </widget>
  <widget class="QPushButton" name="btnSave">
   <property name="geometry">
    <rect>
     <x>140</x>
     <y>180</y>
     <width>91</width>
     <height>28</height>
    </rect>
   </property>
   <property name="text">
    <string>Save</string>
   </property>
  </widget>
 </widget>
 <resources/>
 <connections/>
</ui>

CMakeLists.txt

cmake_minimum_required(VERSION 2.6)
 
PROJECT(FileDialogDefaultSuffix)
 
FIND_PACKAGE(Qt4 REQUIRED)
INCLUDE(${QT_USE_FILE})
 
include_directories(${include_directories} ${CMAKE_CURRENT_SOURCE_DIR} ${CMAKE_CURRENT_BINARY_DIR})
 
QT4_WRAP_UI(UISrcs form.ui)
QT4_WRAP_CPP(MOCSrcs form.h)
 
ADD_EXECUTABLE(FileDialogDefaultSuffix FileDialogDefaultSuffix.cpp form.cpp
${MOCSrcs} ${UISrcs})
TARGET_LINK_LIBRARIES(FileDialogDefaultSuffix ${QT_LIBRARIES})