Fixed issue #479. Improve feature: The Preferences dialog box should be expandable.

--HG--
branch : feature

src/app/valentina/dialogs/configdialog.cpp

@@ -87,14 +87,20 @@ ConfigDialog::ConfigDialog(QWidget *parent) :
 
     QVBoxLayout *mainLayout = new QVBoxLayout;
     mainLayout->addLayout(horizontalLayout);
-    mainLayout->addStretch(1);
+    //mainLayout->addStretch(1);
-    mainLayout->addSpacing(12);
+    //mainLayout->addSpacing(12);
     mainLayout->addLayout(buttonsLayout);
+    mainLayout->setStretch(0, 1);
     setLayout(mainLayout);
 
     setWindowTitle(tr("Config Dialog"));
 
     qApp->Settings()->GetOsSeparator() ? setLocale(QLocale::system()) : setLocale(QLocale(QLocale::C));
+
+    if (s_iLastWidth > 0 && s_iLastHeight > 0)
+    {
+        resize(s_iLastWidth, s_iLastHeight);
+    }
 }
 
 //---------------------------------------------------------------------------------------------------------------------
@@ -145,12 +151,29 @@ void ConfigDialog::showEvent(QShowEvent *event)
     }
     // do your init stuff here
 
-    setMaximumSize(size());
+    //setMaximumSize(size());
+    if (s_iMinWidth > 0 && s_iMinHeight > 0)
+    {
+        setMinimumSize(s_iMinWidth, s_iMinHeight);
+    }
+    else
+    {
         setMinimumSize(size());
+        s_iMinWidth = width();
+        s_iMinHeight = height();
+    }
 
     isInitialized = true;//first show windows are held
 }
 
+//---------------------------------------------------------------------------------------------------------------------
+void ConfigDialog::resizeEvent(QResizeEvent *)
+{
+    // remember the size for the next time this dialog is opened
+    s_iLastWidth = width();
+    s_iLastHeight = height();
+}
+
 //---------------------------------------------------------------------------------------------------------------------
 void ConfigDialog::createIcons()
 {
@@ -217,3 +240,8 @@ void ConfigDialog::RetranslateUi()
     contentsWidget->item(3)->setText(tr("Paths"));
 }
 
+//---------------------------------------------------------------------------------------------------------------------
+int ConfigDialog::s_iLastWidth = 0;
+int ConfigDialog::s_iLastHeight = 0;
+int ConfigDialog::s_iMinWidth = 0;
+int ConfigDialog::s_iMinHeight = 0;

src/app/valentina/dialogs/configdialog.h

@@ -49,6 +49,7 @@ protected:
     virtual void      closeEvent(QCloseEvent *event) Q_DECL_OVERRIDE;
     virtual void      changeEvent(QEvent* event) Q_DECL_OVERRIDE;
     virtual void      showEvent(QShowEvent *event) Q_DECL_OVERRIDE;
+    virtual void      resizeEvent(QResizeEvent *) Q_DECL_OVERRIDE;
 private:
     Q_DISABLE_COPY(ConfigDialog)
     QListWidget       *contentsWidget;
@@ -61,6 +62,13 @@ private:
     QPushButton       *cancelButton;
     QPushButton       *okButton;
     bool              isInitialized;
+    // the following static variables are used to preserve the dialog size when it
+    // is opened again and to hold the minimum size (which will be determined when
+    // the dialog is opened for the first time)
+    static int        s_iLastWidth;
+    static int        s_iLastHeight;
+    static int        s_iMinWidth;
+    static int        s_iMinHeight;
     void              createIcons();
     void              createIcon(const QString &icon, const QString &text);
     void              Apply();