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Impl SuggestedFileType for Save/OpenFilePicker (#20026)

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* new SuggestedFileType API

* Add impl for Win32 SuggestedFileType

* Impl suggestedFileType for GTK

* DBus impl

* Impl API for mac

* Add sample for suggested file filter

---------

Co-authored-by: Emmanuel Hansen <emmausssss@gmail.com>
This commit is contained in:
Jumar Macato
2025-11-13 08:45:42 +08:00
committed by GitHub
parent de2aa227b7
commit 80223ca7d4
9 changed files with 161 additions and 21 deletions
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samples/ControlCatalog/Pages/DialogsPage.xaml
+6
View File
@@ -31,6 +31,12 @@
<ComboBoxItem>TXT mime only</ComboBoxItem>
<ComboBoxItem>TXT apple type id only</ComboBoxItem>
</ComboBox>
<StackPanel Orientation="Horizontal" Spacing="8">
<CheckBox Name="UseSuggestedFilter">Use SuggestedFileType</CheckBox>
<ComboBox Name="SuggestedFilterSelector" MinWidth="160">
<ComboBoxItem>First filter</ComboBoxItem>
</ComboBox>
</StackPanel>
<Expander Header="FilePicker API">
<StackPanel Spacing="4">
<CheckBox Name="ForceManaged">Force managed dialog</CheckBox>
samples/ControlCatalog/Pages/DialogsPage.xaml.cs
+69 -3
View File
@@ -37,6 +37,8 @@ namespace ControlCatalog.Pages
var openedFileContent = OpenedFileContent;
var openMultiple = OpenMultiple;
var currentFolderBox = CurrentFolderBox;
var useSuggestedFilter = UseSuggestedFilter;
var suggestedFilterSelector = SuggestedFilterSelector;
currentFolderBox.TextChanged += async (sender, args) =>
{
@@ -76,7 +78,7 @@ namespace ControlCatalog.Pages
}).ToList() ?? new List<FileDialogFilter>();
}
List<FilePickerFileType>? GetFileTypes()
List<FilePickerFileType>? BuildFileTypes()
{
var selectedItem = (FilterSelector.SelectedItem as ComboBoxItem)?.Content
?? "None";
@@ -115,6 +117,64 @@ namespace ControlCatalog.Pages
};
}
List<FilePickerFileType>? GetFileTypes()
{
var types = BuildFileTypes();
UpdateSuggestedFilterSelector(types);
return types;
}
void UpdateSuggestedFilterSelector(IReadOnlyList<FilePickerFileType>? types)
{
var previouslySelected = (suggestedFilterSelector.SelectedItem as ComboBoxItem)?.Tag as FilePickerFileType;
suggestedFilterSelector.Items.Clear();
suggestedFilterSelector.Items.Add(new ComboBoxItem { Content = "First filter", Tag = null });
var desiredIndex = 0;
if (types is { Count: > 0 })
{
for (var i = 0; i < types.Count; i++)
{
var type = types[i];
var item = new ComboBoxItem { Content = type.Name, Tag = type };
suggestedFilterSelector.Items.Add(item);
if (previouslySelected is not null && ReferenceEquals(previouslySelected, type))
{
desiredIndex = i + 1;
}
}
}
suggestedFilterSelector.SelectedIndex = desiredIndex;
}
FilePickerFileType? GetSuggestedFileType(IReadOnlyList<FilePickerFileType>? types)
{
if (useSuggestedFilter.IsChecked == true && types is { Count: > 0 })
{
if (suggestedFilterSelector.SelectedItem is ComboBoxItem { Tag: FilePickerFileType selectedType }
&& types.Any(t => ReferenceEquals(t, selectedType)))
{
return selectedType;
}
return types.FirstOrDefault();
}
return null;
}
void UpdateSuggestedFilterSelectorState() =>
suggestedFilterSelector.IsEnabled = useSuggestedFilter.IsChecked == true;
useSuggestedFilter.Checked += (_, _) => UpdateSuggestedFilterSelectorState();
useSuggestedFilter.Unchecked += (_, _) => UpdateSuggestedFilterSelectorState();
UpdateSuggestedFilterSelectorState();
FilterSelector.SelectionChanged += (_, _) => UpdateSuggestedFilterSelector(BuildFileTypes());
UpdateSuggestedFilterSelector(BuildFileTypes());
OpenFile.Click += async delegate
{
// Almost guaranteed to exist
@@ -229,10 +289,12 @@ namespace ControlCatalog.Pages
OpenFilePicker.Click += async delegate
{
var fileTypes = GetFileTypes();
var result = await GetStorageProvider().OpenFilePickerAsync(new FilePickerOpenOptions()
{
Title = "Open file",
FileTypeFilter = GetFileTypes(),
FileTypeFilter = fileTypes,
SuggestedFileType = GetSuggestedFileType(fileTypes),
SuggestedFileName = "FileName",
SuggestedStartLocation = lastSelectedDirectory,
AllowMultiple = openMultiple.IsChecked == true
@@ -243,10 +305,12 @@ namespace ControlCatalog.Pages
SaveFilePicker.Click += async delegate
{
var fileTypes = GetFileTypes();
var suggestedType = GetSuggestedFileType(fileTypes);
var file = await GetStorageProvider().SaveFilePickerAsync(new FilePickerSaveOptions()
{
Title = "Save file",
FileTypeChoices = fileTypes,
SuggestedFileType = suggestedType,
SuggestedStartLocation = lastSelectedDirectory,
SuggestedFileName = "FileName",
ShowOverwritePrompt = true
@@ -278,10 +342,12 @@ namespace ControlCatalog.Pages
};
SaveFilePickerWithResult.Click += async delegate
{
var saveFileTypes = new[] { FilePickerFileTypes.Json, FilePickerFileTypes.Xml };
var result = await GetStorageProvider().SaveFilePickerWithResultAsync(new FilePickerSaveOptions()
{
Title = "Save file",
FileTypeChoices = [FilePickerFileTypes.Json, FilePickerFileTypes.Xml],
FileTypeChoices = saveFileTypes,
SuggestedFileType = GetSuggestedFileType(saveFileTypes),
SuggestedStartLocation = lastSelectedDirectory,
SuggestedFileName = "FileName",
ShowOverwritePrompt = true