private static UICollectionViewFlowLayout CollectionViewFlowLayoutForOrientation (UIInterfaceOrientation orientation, GMImagePickerController picker)
{
nfloat screenWidth;
nfloat screenHeight;
//Ipad popover is not affected by rotation!
if (UIDevice.CurrentDevice.UserInterfaceIdiom == UIUserInterfaceIdiom.Pad) {
screenWidth = picker.View.Bounds.Width;
screenHeight = picker.View.Bounds.Height;
} else {
if (UIApplication.SharedApplication.StatusBarOrientation == UIInterfaceOrientation.LandscapeLeft ||
UIApplication.SharedApplication.StatusBarOrientation == UIInterfaceOrientation.LandscapeRight) {
screenHeight = picker.View.Bounds.Width;
screenWidth = picker.View.Bounds.Height;
} else {
screenWidth = picker.View.Bounds.Width;
screenHeight = picker.View.Bounds.Height;
}
}
if ((UIDevice.CurrentDevice.UserInterfaceIdiom == UIUserInterfaceIdiom.Pad) ||
(UIApplication.SharedApplication.StatusBarOrientation == UIInterfaceOrientation.Portrait ||
UIApplication.SharedApplication.StatusBarOrientation == UIInterfaceOrientation.PortraitUpsideDown))
{
if (_portraitLayout == null) {
var cellTotalUsableWidth = screenWidth - (picker.ColsInPortrait - 1) * picker.MinimumInteritemSpacing;
var itemSize = new CGSize (cellTotalUsableWidth / picker.ColsInPortrait, cellTotalUsableWidth / picker.ColsInPortrait);
var cellTotalUsedWidth = (double)itemSize.Width * picker.ColsInPortrait;
var spaceTotalWidth = (double)screenWidth - cellTotalUsedWidth;
var spaceWidth = spaceTotalWidth / (picker.ColsInPortrait - 1);
_portraitLayout = new UICollectionViewFlowLayout {
MinimumInteritemSpacing = picker.MinimumInteritemSpacing,
ItemSize = itemSize,
MinimumLineSpacing = (nfloat) spaceWidth
};
}
return _portraitLayout;
} else {
if (_landscapeLayout == null) {
var cellTotalUsableWidth = screenHeight - (picker.ColsInLandscape - 1) * picker.MinimumInteritemSpacing;
var itemSize = new CGSize (cellTotalUsableWidth / picker.ColsInLandscape, cellTotalUsableWidth / picker.ColsInLandscape);
var cellTotalUsedWidth = (double)itemSize.Width * picker.ColsInLandscape;
var spaceTotalWidth = (double)screenHeight - cellTotalUsedWidth;
var spaceWidth = spaceTotalWidth / (picker.ColsInLandscape - 1);
_landscapeLayout = new UICollectionViewFlowLayout {
MinimumInteritemSpacing = picker.MinimumInteritemSpacing,
ItemSize = itemSize,
MinimumLineSpacing = (nfloat) spaceWidth
};
}
return _landscapeLayout;
}
}
public GMGridViewController (GMImagePickerController picker) : base(CollectionViewFlowLayoutForOrientation(UIApplication.SharedApplication.StatusBarOrientation, picker))
{
//Custom init. The picker contains custom information to create the FlowLayout
this._picker = picker;
//Compute the thumbnail pixel size:
var scale = UIScreen.MainScreen.Scale;
var layout = (UICollectionViewFlowLayout)Layout;
AssetGridThumbnailSize = new CGSize (layout.ItemSize.Width * scale, layout.ItemSize.Height * scale);
CollectionView.AllowsMultipleSelection = _picker.AllowsMultipleSelection;
CollectionView.RegisterClassForCell (typeof(GMGridViewCell), GMGridViewCollectionViewSource.GMGridViewCellIdentifier);
PreferredContentSize = GMImagePickerController.PopoverContentSize;
}
public GMGridViewController(GMImagePickerController picker) : base(CollectionViewFlowLayoutForOrientation(UIApplication.SharedApplication.StatusBarOrientation, picker))
{
//Custom init. The picker contains custom information to create the FlowLayout
_picker = picker;
//Compute the thumbnail pixel size:
var scale = UIScreen.MainScreen.Scale;
var layout = (UICollectionViewFlowLayout)Layout;
AssetGridThumbnailSize = new CGSize(layout.ItemSize.Width * scale, layout.ItemSize.Height * scale);
CollectionView.AllowsMultipleSelection = _picker.AllowsMultipleSelection;
CollectionView.RegisterClassForCell(typeof(GMGridViewCell), GMGridViewCollectionViewSource.GMGridViewCellIdentifier);
PreferredContentSize = GMImagePickerController.PopoverContentSize;
}
private static UICollectionViewFlowLayout CollectionViewFlowLayoutForOrientation(UIInterfaceOrientation orientation, GMImagePickerController picker)
{
nfloat screenWidth;
nfloat screenHeight;
//Ipad popover is not affected by rotation!
if (UIDevice.CurrentDevice.UserInterfaceIdiom == UIUserInterfaceIdiom.Pad)
{
screenWidth = picker.View.Bounds.Width;
screenHeight = picker.View.Bounds.Height;
}
else
{
var insets = UIEdgeInsets.Zero;
if (picker.View.RespondsToSelector(new ObjCRuntime.Selector("safeAreaInsets")))
{
insets = picker.View.SafeAreaInsets;
}
var horizontalInsets = insets.Right + insets.Left;
var verticalInsets = insets.Bottom + insets.Top;
if (UIApplication.SharedApplication.StatusBarOrientation == UIInterfaceOrientation.LandscapeLeft ||
UIApplication.SharedApplication.StatusBarOrientation == UIInterfaceOrientation.LandscapeRight)
{
screenHeight = picker.View.Bounds.Width - horizontalInsets;
screenWidth = picker.View.Bounds.Height - verticalInsets;
}
else
{
screenWidth = picker.View.Bounds.Width - horizontalInsets;
screenHeight = picker.View.Bounds.Height - verticalInsets;
}
}
if ((UIDevice.CurrentDevice.UserInterfaceIdiom == UIUserInterfaceIdiom.Pad) ||
(UIApplication.SharedApplication.StatusBarOrientation == UIInterfaceOrientation.Portrait ||
UIApplication.SharedApplication.StatusBarOrientation == UIInterfaceOrientation.PortraitUpsideDown))
{
if (_portraitLayout == null)
{
var cellTotalUsableWidth = screenWidth - (picker.ColsInPortrait - 1) * picker.MinimumInteritemSpacing;
var itemSize = new CGSize(cellTotalUsableWidth / picker.ColsInPortrait, cellTotalUsableWidth / picker.ColsInPortrait);
var cellTotalUsedWidth = (double)itemSize.Width * picker.ColsInPortrait;
var spaceTotalWidth = screenWidth - cellTotalUsedWidth;
var spaceWidth = spaceTotalWidth / (picker.ColsInPortrait - 1);
_portraitLayout = new UICollectionViewFlowLayout {
MinimumInteritemSpacing = picker.MinimumInteritemSpacing,
ItemSize = itemSize,
MinimumLineSpacing = (nfloat)spaceWidth
};
if (_portraitLayout.RespondsToSelector(new ObjCRuntime.Selector("sectionInsetReference")))
{
_portraitLayout.SectionInsetReference = UICollectionViewFlowLayoutSectionInsetReference.SafeArea;
}
}
return(_portraitLayout);
}
else
{
if (_landscapeLayout == null)
{
var cellTotalUsableWidth = screenHeight - (picker.ColsInLandscape - 1) * picker.MinimumInteritemSpacing;
var itemSize = new CGSize(cellTotalUsableWidth / picker.ColsInLandscape, cellTotalUsableWidth / picker.ColsInLandscape);
var cellTotalUsedWidth = (double)itemSize.Width * picker.ColsInLandscape;
var spaceTotalWidth = screenHeight - cellTotalUsedWidth;
var spaceWidth = spaceTotalWidth / (picker.ColsInLandscape - 1);
_landscapeLayout = new UICollectionViewFlowLayout {
MinimumInteritemSpacing = picker.MinimumInteritemSpacing,
ItemSize = itemSize,
MinimumLineSpacing = (nfloat)spaceWidth
};
if (_landscapeLayout.RespondsToSelector(new ObjCRuntime.Selector("sectionInsetReference")))
{
_landscapeLayout.SectionInsetReference = UICollectionViewFlowLayoutSectionInsetReference.SafeArea;
}
}
return(_landscapeLayout);
}
}
private static UICollectionViewFlowLayout CollectionViewFlowLayoutForOrientation(UIInterfaceOrientation orientation, GMImagePickerController picker)
{
nfloat screenWidth;
nfloat screenHeight;
//Ipad popover is not affected by rotation!
if (UIDevice.CurrentDevice.UserInterfaceIdiom == UIUserInterfaceIdiom.Pad)
{
screenWidth = picker.View.Bounds.Width;
screenHeight = picker.View.Bounds.Height;
}
else
{
if (UIApplication.SharedApplication.StatusBarOrientation == UIInterfaceOrientation.LandscapeLeft ||
UIApplication.SharedApplication.StatusBarOrientation == UIInterfaceOrientation.LandscapeRight)
{
screenHeight = picker.View.Bounds.Width;
screenWidth = picker.View.Bounds.Height;
}
else
{
screenWidth = picker.View.Bounds.Width;
screenHeight = picker.View.Bounds.Height;
}
}
if ((UIDevice.CurrentDevice.UserInterfaceIdiom == UIUserInterfaceIdiom.Pad) ||
(UIApplication.SharedApplication.StatusBarOrientation == UIInterfaceOrientation.Portrait ||
UIApplication.SharedApplication.StatusBarOrientation == UIInterfaceOrientation.PortraitUpsideDown))
{
if (_portraitLayout == null)
{
var cellTotalUsableWidth = screenWidth - (picker.ColsInPortrait - 1) * picker.MinimumInteritemSpacing;
var itemSize = new CGSize(cellTotalUsableWidth / picker.ColsInPortrait, cellTotalUsableWidth / picker.ColsInPortrait);
var cellTotalUsedWidth = (double)itemSize.Width * picker.ColsInPortrait;
var spaceTotalWidth = screenWidth - cellTotalUsedWidth;
var spaceWidth = spaceTotalWidth / (picker.ColsInPortrait - 1);
_portraitLayout = new UICollectionViewFlowLayout {
MinimumInteritemSpacing = picker.MinimumInteritemSpacing,
ItemSize = itemSize,
MinimumLineSpacing = (nfloat)spaceWidth
};
}
return(_portraitLayout);
}
else
{
if (_landscapeLayout == null)
{
var cellTotalUsableWidth = screenHeight - (picker.ColsInLandscape - 1) * picker.MinimumInteritemSpacing;
var itemSize = new CGSize(cellTotalUsableWidth / picker.ColsInLandscape, cellTotalUsableWidth / picker.ColsInLandscape);
var cellTotalUsedWidth = (double)itemSize.Width * picker.ColsInLandscape;
var spaceTotalWidth = screenHeight - cellTotalUsedWidth;
var spaceWidth = spaceTotalWidth / (picker.ColsInLandscape - 1);
_landscapeLayout = new UICollectionViewFlowLayout {
MinimumInteritemSpacing = picker.MinimumInteritemSpacing,
ItemSize = itemSize,
MinimumLineSpacing = (nfloat)spaceWidth
};
}
return(_landscapeLayout);
}
}
public override void ViewDidLoad()
{
base.ViewDidLoad();
_picker = (GMImagePickerController)NavigationController.ParentViewController;
View.BackgroundColor = _picker.PickerBackgroundColor;
// Navigation bar customization
if (!string.IsNullOrWhiteSpace(_picker.CustomNavigationBarPrompt))
{
NavigationItem.Prompt = _picker.CustomNavigationBarPrompt;
}
_imageManager = new PHCachingImageManager();
// Table view aspect
TableView.RowHeight = AlbumRowHeight;
TableView.SeparatorStyle = UITableViewCellSeparatorStyle.None;
TableView.Source = new GMAlbumsViewTableViewSource(this);
// Buttons
var barButtonItemAttributes = new UITextAttributes
{
Font = UIFont.FromName(_picker.PickerFontName, _picker.PickerFontHeaderSize)
};
var cancelTitle = _picker.CustomCancelButtonTitle ?? "picker.navigation.cancel-button".Translate(defaultValue: "Cancel");
NavigationItem.LeftBarButtonItem = new UIBarButtonItem(cancelTitle,
UIBarButtonItemStyle.Plain,
Dismiss);
if (_picker.UseCustomFontForNavigationBar)
{
NavigationItem.LeftBarButtonItem.SetTitleTextAttributes(barButtonItemAttributes, UIControlState.Normal);
NavigationItem.LeftBarButtonItem.SetTitleTextAttributes(barButtonItemAttributes, UIControlState.Highlighted);
}
if (_picker.AllowsMultipleSelection)
{
var doneTitle = _picker.CustomDoneButtonTitle ?? "picker.navigation.done-button".Translate(defaultValue: "Done");
NavigationItem.RightBarButtonItem = new UIBarButtonItem(doneTitle,
UIBarButtonItemStyle.Done,
FinishPickingAssets);
if (_picker.UseCustomFontForNavigationBar)
{
NavigationItem.RightBarButtonItem.SetTitleTextAttributes(barButtonItemAttributes, UIControlState.Normal);
NavigationItem.RightBarButtonItem.SetTitleTextAttributes(barButtonItemAttributes, UIControlState.Highlighted);
}
NavigationItem.RightBarButtonItem.Enabled = !_picker.AutoDisableDoneButton || _picker.SelectedAssets.Any();
}
// Bottom toolbar
ToolbarItems = _picker.GetToolbarItems();
// Title
Title = _picker.Title ?? "picker.navigation.title".Translate(defaultValue: "Navigation bar default title");
// Fetch PHAssetCollections
var topLevelUserCollections = PHCollection.FetchTopLevelUserCollections(null);
var smartAlbums = PHAssetCollection.FetchAssetCollections(PHAssetCollectionType.SmartAlbum, PHAssetCollectionSubtype.AlbumRegular, null);
_collectionsFetchResults = new List <PHFetchResult> {
topLevelUserCollections, smartAlbums
};
_collectionsLocalizedTitles = new List <string> {
"picker.table.user-albums-header".Translate(defaultValue: "Albums"), "picker.table.smart-albums-header".Translate("Smart Albums")
};
UpdateFetchResults();
// Register for changes
PHPhotoLibrary.SharedPhotoLibrary.RegisterChangeObserver(this);
}
public GMImagePickerDelegate(GMImagePickerController parent)
{
_parent = parent;
}
public override void ViewDidLoad ()
{
base.ViewDidLoad ();
_picker = (GMImagePickerController) NavigationController.ParentViewController;
View.BackgroundColor = _picker.PickerBackgroundColor;
// Navigation bar customization
if (!string.IsNullOrWhiteSpace (_picker.CustomNavigationBarPrompt)) {
NavigationItem.Prompt = _picker.CustomNavigationBarPrompt;
}
_imageManager = new PHCachingImageManager ();
// Table view aspect
TableView.RowHeight = AlbumRowHeight;
TableView.SeparatorStyle = UITableViewCellSeparatorStyle.None;
TableView.Source = new GMAlbumsViewTableViewSource (this);
// Buttons
var barButtonItemAttributes = new UITextAttributes {
Font = UIFont.FromName(_picker.PickerFontName, _picker.PickerFontHeaderSize)
};
var cancelTitle = _picker.CustomCancelButtonTitle ?? "picker.navigation.cancel-button".Translate(defaultValue: "Cancel");
NavigationItem.LeftBarButtonItem = new UIBarButtonItem (cancelTitle,
UIBarButtonItemStyle.Plain,
Dismiss);
if (_picker.UseCustomFontForNavigationBar) {
NavigationItem.LeftBarButtonItem.SetTitleTextAttributes(barButtonItemAttributes, UIControlState.Normal);
NavigationItem.LeftBarButtonItem.SetTitleTextAttributes(barButtonItemAttributes, UIControlState.Highlighted);
}
if (_picker.AllowsMultipleSelection) {
var doneTitle = _picker.CustomDoneButtonTitle ?? "picker.navigation.done-button".Translate(defaultValue: "Done");
NavigationItem.RightBarButtonItem = new UIBarButtonItem (doneTitle,
UIBarButtonItemStyle.Done,
FinishPickingAssets);
if (_picker.UseCustomFontForNavigationBar) {
NavigationItem.RightBarButtonItem.SetTitleTextAttributes(barButtonItemAttributes, UIControlState.Normal);
NavigationItem.RightBarButtonItem.SetTitleTextAttributes(barButtonItemAttributes, UIControlState.Highlighted);
}
NavigationItem.RightBarButtonItem.Enabled = _picker.AutoDisableDoneButton ? _picker.SelectedAssets.Any () : true;
}
// Bottom toolbar
ToolbarItems = _picker.GetToolbarItems();
// Title
Title = _picker.Title ?? "picker.navigation.title".Translate(defaultValue: "Navigation bar default title");
// Fetch PHAssetCollections
var topLevelUserCollections = PHCollectionList.FetchTopLevelUserCollections(null);
var smartAlbums = PHAssetCollection.FetchAssetCollections (PHAssetCollectionType.SmartAlbum, PHAssetCollectionSubtype.AlbumRegular, null);
_collectionsFetchResults = new List<PHFetchResult> { topLevelUserCollections, smartAlbums };
_collectionsLocalizedTitles = new List<string> { "picker.table.user-albums-header".Translate (defaultValue: "Albums"), "picker.table.smart-albums-header".Translate("Smart Albums") };
UpdateFetchResults ();
// Register for changes
PHPhotoLibrary.SharedPhotoLibrary.RegisterChangeObserver(this);
if (UIDevice.CurrentDevice.CheckSystemVersion (7, 0)) {
EdgesForExtendedLayout = UIRectEdge.None;
}
}
public GMImagePickerDelegate(GMImagePickerController parent)
{
_parent = parent;
}
async partial void ShowGMImagePicker (NSObject sender)
{
var picker = new GMImagePickerController {
Title = "Custom Title",
CustomDoneButtonTitle = "Finished",
CustomCancelButtonTitle = "Nope",
CustomNavigationBarPrompt = "Take a new photo or select an existing one!",
ColsInPortrait = 3,
ColsInLandscape = 5,
MinimumInteritemSpacing = 2.0f,
DisplaySelectionInfoToolbar = true,
AllowsMultipleSelection = true,
ShowCameraButton = true,
AutoSelectCameraImages = true,
ModalPresentationStyle = UIModalPresentationStyle.Popover,
MediaTypes = new [] { PHAssetMediaType.Image },
// Other customizations to play with:
//GridSortOrder = SortOrder.Descending,
//ConfirmSingleSelection = true,
//ConfirmSingleSelectionPrompt = "Do you want to select the image you have chosen?",
//PickerBackgroundColor = UIColor.Black,
//PickerTextColor = UIColor.White,
//ToolbarBarTintColor = UIColor.DarkGray,
//ToolbarTextColor = UIColor.White,
//ToolbarTintColor = UIColor.Red,
//NavigationBarBackgroundColor = UIColor.Black,
//NavigationBarTextColor = UIColor.White,
//NavigationBarTintColor = UIColor.Red,
//PickerFontName = "Verdana",
//PickerBoldFontName = "Verdana-Bold",
//PickerFontNormalSize = 14.0f,
//PickerFontHeaderSize = 17.0f,
//PickerStatusBarStyle = UIStatusBarStyle.LightContent,
//UseCustomFontForNavigationBar = true,
};
// You can limit which galleries are available to browse through
picker.CustomSmartCollections = new [] {
PHAssetCollectionSubtype.SmartAlbumUserLibrary,
PHAssetCollectionSubtype.AlbumRegular
};
if (_preselectedAssets != null)
{
foreach (var asset in _preselectedAssets)
{
picker.SelectedAssets.Add(asset);
}
}
// Event handling
picker.FinishedPickingAssets += Picker_FinishedPickingAssets;
picker.Canceled += Picker_Canceled;
// Other events to implement in order to influence selection behavior:
// Set EventArgs::Cancel flag to true in order to prevent the action from happening
picker.ShouldDeselectAsset += (s, e) => { /* allow deselection of (mandatory) assets */ };
picker.ShouldEnableAsset += (s, e) => { /* determine if a specific asset should be enabled */ };
picker.ShouldHighlightAsset += (s, e) => { /* determine if a specific asset should be highlighted */ };
picker.ShouldShowAsset += (s, e) => { /* determine if a specific asset should be displayed */ };
picker.ShouldSelectAsset += (s, e) => { /* determine if a specific asset can be selected */ };
picker.AssetSelected += (s, e) => { /* keep track of individual asset selection */ };
picker.AssetDeselected += (s, e) => { /* keep track of individual asset de-selection */ };
// GMImagePicker can be treated as a PopOver as well:
var popPC = picker.PopoverPresentationController;
popPC.PermittedArrowDirections = UIPopoverArrowDirection.Any;
popPC.SourceView = gmImagePickerButton;
popPC.SourceRect = gmImagePickerButton.Bounds;
//popPC.BackgroundColor = UIColor.Black;
await PresentViewControllerAsync(picker, true);
}
