QPlatformDialogHelper: Split class hierarchy, decouple from Dialog

- Introduce hierarchy of QPlatformDialogHelper-derived classes
  for font, color and file dialogs.
- Start reducing dependencies on QDialog:
  * Remove QDialog-specifics from interface, introduce enumeration
    for DialogCode
  * Make the helpers Q_OBJECTS to be able to add the signals
    passed on to the QDialogs
  * Remove QDialogPrivate pointer
- Split setVisible_sys() in show_sys() (factory method for native
  dialogs) and hide_sys(). Pass parent window to  show_sys(),
  removing the necessity to query the QDialog for it
- Introduce a styleHint() similar to QGuiApplication's for
  platform-specific
- Fix compile in cocoa/windows, reduce depency on QDialog
  (-private) classes.

Change-Id: Ic1cb715e1edf767f2cb18b9780341d189339ef1d
Reviewed-by: Morten Johan Sørvig <morten.sorvig@nokia.com>

1 files changed, 5 insertions, 3 deletions

diff --git a/src/plugins/platforms/cocoa/qcocoafiledialoghelper.h b/src/plugins/platforms/cocoa/qcocoafiledialoghelper.h
index 06309ab62b..c38ea90f19 100644
--- a/src/plugins/platforms/cocoa/qcocoafiledialoghelper.h
+++ b/src/plugins/platforms/cocoa/qcocoafiledialoghelper.h
@@ -44,10 +44,11 @@
 
 #include <QObject>
 #include <qplatformdialoghelper_qpa.h>
+
 class QFileDialog;
 class QFileDialogPrivate;
 
-class QCocoaFileDialogHelper : public QPlatformDialogHelper
+class QCocoaFileDialogHelper : public QPlatformFileDialogHelper
 {
 public:
     QCocoaFileDialogHelper(QFileDialog *dialog);
@@ -59,8 +60,9 @@ public:
     bool defaultNameFilterDisables() const;
 
     void deleteNativeDialog_sys();
-    bool setVisible_sys(bool visible);
-    QDialog::DialogCode dialogResultCode_sys();
+    bool show_sys(QWindow *parent);
+    void hide_sys();
+    QPlatformFileDialogHelper::DialogCode dialogResultCode_sys();
     void setDirectory_sys(const QString &directory);
     QString directory_sys() const;
     void selectFile_sys(const QString &filename);