public UserAnnotationViewModel(ISharedDataService sharedDataService, MeetingViewModel meeting)
{
Meeting = meeting;
AnnotationsModel = sharedDataService.AnnotationsModel;
SurfaceSize = new AnnotationSurfaceSize();
var activeToolObs = Meeting.WhenAnyValue(vm => vm.ActiveTool)
.Where(t => t != null);
var pageChangedObs = activeToolObs
.Select(t => t.WhenAnyValue(v => v.CurrentPageNumber,
p => new ToolIdAndPageNumber { ToolId = t.ToolId, PageNumber = p })
)
.Switch(); // Only listen to the most recent sequence of property changes (active tool)
// Every time the tool changes, select the tool id and current page number
var toolChangedObs = activeToolObs
.Select(t => new ToolIdAndPageNumber { ToolId = t.ToolId, PageNumber = t.CurrentPageNumber });
// Merge them together - tool changes and current page of the tool
_collectionRefreshSub = toolChangedObs
.Merge(pageChangedObs)
.Subscribe(t => this.RaisePropertyChanged("Annotations"));
// whenever the suface size's width or height changes, re-bind the annotations
// on the agent's side, this will send stuff over the wire. need to figure out how to solve this.
_sizeChangedSub = this.SurfaceSize
.WhenAnyValue(p => p.Width, p => p.Height, (w, h) => true)
.Subscribe(p => this.RaisePropertyChanged("Annotations"));
}
public UserAnnotationViewModel(ISharedDataService sharedDataService, MeetingViewModel meeting)
{
Meeting = meeting;
AnnotationsModel = sharedDataService.AnnotationsModel;
SurfaceSize = new AnnotationSurfaceSize();
var activeToolObs = Meeting.WhenAnyValue(vm => vm.ActiveTool)
.Where(t => t != null);
var pageChangedObs = activeToolObs
.Select(t => t.WhenAnyValue(v => v.CurrentPageNumber,
p => new ToolIdAndPageNumber {
ToolId = t.ToolId, PageNumber = p
})
)
.Switch(); // Only listen to the most recent sequence of property changes (active tool)
// Every time the tool changes, select the tool id and current page number
var toolChangedObs = activeToolObs
.Select(t => new ToolIdAndPageNumber {
ToolId = t.ToolId, PageNumber = t.CurrentPageNumber
});
// Merge them together - tool changes and current page of the tool
_collectionRefreshSub = toolChangedObs
.Merge(pageChangedObs)
.Subscribe(t => this.RaisePropertyChanged("Annotations"));
// whenever the suface size's width or height changes, re-bind the annotations
// on the agent's side, this will send stuff over the wire. need to figure out how to solve this.
_sizeChangedSub = this.SurfaceSize
.WhenAnyValue(p => p.Width, p => p.Height, (w, h) => true)
.Subscribe(p => this.RaisePropertyChanged("Annotations"));
}
