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QFileDialog: documentation clarifications about file type filtering

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*.* is not a portable file type filter.  Anyway it's better to filter
by mime types, because it's more inclusive now and may even get better
in the future.

Task-number: QTBUG-37393
Change-Id: Ide3c3dfc47cd4b4c55d842b73de5369a0596a546
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@digia.com>
This commit is contained in:
Shawn Rutledge 2014-03-11 15:56:26 +01:00 committed by The Qt Project
parent a1a2a038db
commit f6d3b65e45
1 changed files with 14 additions and 2 deletions
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16
src/widgets/dialogs/qfiledialog.cpp
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@ -1313,13 +1313,13 @@ QStringList qt_make_filter_list(const QString &filter)
Sets the filter used in the file dialog to the given \a filter.
If \a filter contains a pair of parentheses containing one or more
of \b{anything*something}, separated by spaces, then only the
filename-wildcard patterns, separated by spaces, then only the
text contained in the parentheses is used as the filter. This means
that these calls are all equivalent:
\snippet code/src_gui_dialogs_qfiledialog.cpp 6
\sa setNameFilters()
\sa setMimeTypeFilters(), setNameFilters()
*/
void QFileDialog::setNameFilter(const QString &filter)
{
@ -1373,7 +1373,19 @@ QStringList qt_strip_filters(const QStringList &filters)
Sets the \a filters used in the file dialog.
Note that the filter \b{*.*} is not portable, because the historical
assumption that the file extension determines the file type is not
consistent on every operating system. It is possible to have a file with no
dot in its name (for example, \c Makefile). In a native Windows file
dialog, \b{*.*} will match such files, while in other types of file dialogs
it may not. So it is better to use \b{*} if you mean to select any file.
\snippet code/src_gui_dialogs_qfiledialog.cpp 7
\l setMimeTypeFilters() has the advantage of providing all possible name
filters for each file type. For example, JPEG images have three possible
extensions; if your application can open such files, selecting the
\c image/jpeg mime type as a filter will allow you to open all of them.
*/
void QFileDialog::setNameFilters(const QStringList &filters)
{