QFileDialog: add MIME Type filters

Currently just a convenience method for setNameFilters(), it uses
QMimeType to create a name filter from the glob patterns and
description defined in each MIME type.

In the longer term, this API could be used to do proper mimetype-based
filtering using QMimeDatabase::mimeTypeForFile() in the builtin
QFileDialog (aka "not native"), instead of only looking at globs via the
name filters.

Change-Id: I0edccf5f30c514481b47cd100d743d1ed7a24024
Reviewed-by: Frederik Gladhorn <frederik.gladhorn@digia.com>

2 files changed, 14 insertions, 0 deletions

diff --git a/src/gui/kernel/qplatformdialoghelper.cpp b/src/gui/kernel/qplatformdialoghelper.cpp
index d9e9c4b17c..404700292c 100644
--- a/src/gui/kernel/qplatformdialoghelper.cpp
+++ b/src/gui/kernel/qplatformdialoghelper.cpp
@@ -359,6 +359,7 @@ public:
     QDir::Filters filters;
     QList<QUrl> sidebarUrls;
     QStringList nameFilters;
+    QStringList mimeTypeFilters;
     QString defaultSuffix;
     QStringList history;
     QUrl initialDirectory;
@@ -477,6 +478,16 @@ QStringList QFileDialogOptions::nameFilters() const
     return d->nameFilters;
 }
 
+void QFileDialogOptions::setMimeTypeFilters(const QStringList &filters)
+{
+    d->mimeTypeFilters = filters;
+}
+
+QStringList QFileDialogOptions::mimeTypeFilters() const
+{
+    return d->mimeTypeFilters;
+}
+
 void QFileDialogOptions::setDefaultSuffix(const QString &suffix)
 {
     d->defaultSuffix = suffix;
diff --git a/src/gui/kernel/qplatformdialoghelper.h b/src/gui/kernel/qplatformdialoghelper.h
index 6d7d52ccb1..5269416ffd 100644
--- a/src/gui/kernel/qplatformdialoghelper.h
+++ b/src/gui/kernel/qplatformdialoghelper.h
@@ -265,6 +265,9 @@ public:
     void setNameFilters(const QStringList &filters);
     QStringList nameFilters() const;
 
+    void setMimeTypeFilters(const QStringList &filters);
+    QStringList mimeTypeFilters() const;
+
     void setDefaultSuffix(const QString &suffix);
     QString defaultSuffix() const;