QFileDialog: add setSupportedSchemes and pass it along to the QPA.

This also finishes the implementation of the static methods which
were being passed a supportedSchemes argument but weren't using it.
Now they can pass it along to the QFileDialog instance, which then
passes it to the helper used by the QPA implementation of the file
dialog. The default implementation only supports local files and
can therefore ignore this, but other implementations can use this
argument to restrict the protocols allowed to the user.

[ChangeLog][Widgets][QFileDialog] Add supportedSchemes property.

Change-Id: I5235f70e785da1c06866a8355ef98f571890c4a2
Reviewed-by: Kevin Ottens <kevin.ottens@kdab.com>
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@theqtcompany.com>

2 files changed, 16 insertions, 0 deletions

diff --git a/src/gui/kernel/qplatformdialoghelper.cpp b/src/gui/kernel/qplatformdialoghelper.cpp
index 2d0458f705..25894fd504 100644
--- a/src/gui/kernel/qplatformdialoghelper.cpp
+++ b/src/gui/kernel/qplatformdialoghelper.cpp
@@ -422,6 +422,7 @@ public:
     QUrl initialDirectory;
     QString initiallySelectedNameFilter;
     QList<QUrl> initiallySelectedFiles;
+    QStringList supportedSchemes;
 };
 
 QFileDialogOptions::QFileDialogOptions() : d(new QFileDialogOptionsPrivate)
@@ -613,6 +614,18 @@ void QFileDialogOptions::setInitiallySelectedFiles(const QList<QUrl> &files)
     d->initiallySelectedFiles = files;
 }
 
+// Schemes supported by the application
+void QFileDialogOptions::setSupportedSchemes(const QStringList &schemes)
+{
+    d->supportedSchemes = schemes;
+}
+
+QStringList QFileDialogOptions::supportedSchemes() const
+{
+    return d->supportedSchemes;
+}
+
+// Return true if the URL is supported by the filedialog implementation *and* by the application.
 bool QPlatformFileDialogHelper::isSupportedUrl(const QUrl &url) const
 {
     return url.isLocalFile();
diff --git a/src/gui/kernel/qplatformdialoghelper.h b/src/gui/kernel/qplatformdialoghelper.h
index 8b2b9881b7..ec88770862 100644
--- a/src/gui/kernel/qplatformdialoghelper.h
+++ b/src/gui/kernel/qplatformdialoghelper.h
@@ -348,6 +348,9 @@ public:
     QList<QUrl> initiallySelectedFiles() const;
     void setInitiallySelectedFiles(const QList<QUrl> &);
 
+    void setSupportedSchemes(const QStringList &schemes);
+    QStringList supportedSchemes() const;
+
 private:
     QSharedDataPointer<QFileDialogOptionsPrivate> d;
 };