// https://docs.microsoft.com/en-us/dotnet/framework/wpf/advanced/walkthrough-enabling-drag-and-drop-on-a-user-control
private void canvas_Drop(object sender, DragEventArgs e)
{
// If an element in the panel has already handled in the drop,
// the panel should not also handle it.
if (!e.Handled && e.Data.GetDataPresent(MyRockShape.RockViewModelDataFormatName))
{
bool isAllowedDragMove = false;
// Canvas inherits Panel
Panel _canvas = sender as Panel;
RockViewModel selectedRock = rocksOnWallViewModel.SelectedRock;
if (_canvas != null && selectedRock != null)
{
Point mousePt = e.GetPosition(cameraIMG);
// check rock overlaps
if (rocksOnWallViewModel.IsOverlapWithRocksOnWallOtherThanSelectedRock(
mousePt, selectedRock.SizeOnCanvas)
== false)
{
CameraSpacePoint csp = jcWall.GetCamSpacePointFromMousePoint(mousePt, _mode);
if (!csp.Equals(default(CameraSpacePoint)))
{
// note:
// use RocksOnWallViewModel.MoveSelectedRock()
// instead of RockViewModel.MoveBoulder()
// because RocksOnWallViewModel.MoveSelectedRock()
// will set the selected rock indicator as well
isAllowedDragMove = rocksOnWallViewModel.MoveSelectedRock(csp);
if (!isAllowedDragMove)
{
UiHelper.NotifyUser(DepthInfoMissingWarningMsg);
}
}
else
{
UiHelper.NotifyUser(DepthInfoMissingWarningMsg);
}
}
else
{
UiHelper.NotifyUser(RockOverlapsWarningMsg);
}
}
if (isAllowedDragMove)
{
e.Effects = supportedDragDropEffects;
}
else
{
e.Effects = DragDropEffects.None;
}
}
}
private void canvas_MouseDown(object sender, MouseButtonEventArgs e)
{
if (isSnapShotTaken)
{
//Debug.WriteLine("canvas_MouseDown");
Point mouseClickPt = e.GetPosition(cameraIMG);
RockViewModel rockCorrespondsToCanvasPt =
rocksOnWallViewModel.GetRockInListByCanvasPoint(mouseClickPt);
if (rockCorrespondsToCanvasPt == null) // new rock
{
Size newBoulderSizeOnCanvas = GetBoulderSizeOnCanvasFromSliders();
// check rock overlaps
if (rocksOnWallViewModel.IsOverlapWithRocksOnWall(
mouseClickPt, newBoulderSizeOnCanvas)
== false)
{
CameraSpacePoint csp = jcWall.GetCamSpacePointFromMousePoint(mouseClickPt, _mode);
if (!csp.Equals(default(CameraSpacePoint)))
{
rocksOnWallViewModel.AddRock(csp, newBoulderSizeOnCanvas);
}
else
{
UiHelper.NotifyUser(DepthInfoMissingWarningMsg);
}
}
else
{
UiHelper.NotifyUser(RockOverlapsWarningMsg);
}
}
else // rock already in list
{
rocksOnWallViewModel.SelectedRock = rockCorrespondsToCanvasPt;
boulderWidthSlider.Value = rockCorrespondsToCanvasPt.RockShapeContainer.GetWidth();
boulderHeightSlider.Value = rockCorrespondsToCanvasPt.RockShapeContainer.GetHeight();
// if rock already in list, enable drag drop!
rockCorrespondsToCanvasPt.RockShapeContainer.DoDragDrop();
}
}
else
{
UiHelper.NotifyUser("Please take snap shot first.");
}
}
private void canvas_MouseDown(object sender, MouseButtonEventArgs e)
{
if (isSnapShotTaken)
{
Point mouseClickPt = e.GetPosition(cameraIMG);
//ColorSpacePoint _boulderCSP = new ColorSpacePoint { X = (float)mouseClickPt.X, Y = (float)mouseClickPt.Y };
RockViewModel rockCorrespondsToCanvasPt =
rocksOnWallViewModel.GetRockInListByCanvasPoint(mouseClickPt);
if (rockCorrespondsToCanvasPt == null) // new rock
{
Size newBoulderSizeOnCanvas = GetNewBoulderSizeOnCanvasFromSliders();
// check rock overlaps
if (rocksOnWallViewModel.IsOverlapWithRocksOnWall(
mouseClickPt, newBoulderSizeOnCanvas)
== false)
{
CameraSpacePoint csp = jcWall.GetCamSpacePointFromMousePoint(mouseClickPt, _mode);
if (!csp.Equals(default(CameraSpacePoint)))
{
rocksOnWallViewModel.AddRock(csp, newBoulderSizeOnCanvas);
}
else
{
UiHelper.NotifyUser("No depth info is captured for this point!");
}
}
else
{
UiHelper.NotifyUser(RockOverlapsWarningMsg);
}
}
else // rock already in list
{
rocksOnWallViewModel.SelectedRock = rockCorrespondsToCanvasPt;
boulderWidthSlider.Value = rockCorrespondsToCanvasPt.BoulderShape.Width;
boulderHeightSlider.Value = rockCorrespondsToCanvasPt.BoulderShape.Height;
}
}
else
{
UiHelper.NotifyUser("Please take snap shot first.");
}
}
// https://docs.microsoft.com/en-us/dotnet/framework/wpf/advanced/walkthrough-enabling-drag-and-drop-on-a-user-control
private void canvas_DragOver(object sender, DragEventArgs e)
{
if (e.Data.GetDataPresent(MyRockShape.RockViewModelDataFormatName))
{
//Debug.WriteLine("canvas_DragOver");
bool isAllowedDragMove = false;
// Canvas inherits Panel
Panel _canvas = sender as Panel;
RockViewModel selectedRock = rocksOnWallViewModel.SelectedRock;
if (_canvas != null && selectedRock != null)
{
Point mousePt = e.GetPosition(cameraIMG);
// check rock overlaps
if (rocksOnWallViewModel.IsOverlapWithRocksOnWallOtherThanSelectedRock(
mousePt, selectedRock.SizeOnCanvas)
== false)
{
CameraSpacePoint csp = jcWall.GetCamSpacePointFromMousePoint(mousePt, _mode);
if (!csp.Equals(default(CameraSpacePoint)))
{
// note:
// use RocksOnWallViewModel.MoveSelectedRock()
// instead of RockViewModel.MoveBoulder()
// because RocksOnWallViewModel.MoveSelectedRock()
// will set the selected rock indicator as well
isAllowedDragMove = rocksOnWallViewModel.MoveSelectedRock(csp);
}
}
}
// These Effects values are used in the drag source's
// GiveFeedback event handler to determine which cursor to display.
if (isAllowedDragMove)
{
e.Effects = supportedDragDropEffects;
}
else
{
e.Effects = DragDropEffects.None;
}
}
}
// Base on what user click, generate the corresonding dialog type
private async void CreateDialog(object parameter)
{
var str = parameter as string;
this.ChangeView();
switch (str)
{
case "Rock":
// initialize a basic dialog and set the title
custom = new CustomDialog() { Title = str };
// initialize rock view model and pass the close capability, collection, and new object.
var RockViewModel = new RockViewModel(instance => dialogCoordinator.HideMetroDialogAsync(this, custom),
debrisFlowCollection, new Rock());
//set the dialog's content to the rock view page
custom.Content = new DebrisFlowRecordDialog { DataContext = RockViewModel };
// wait for the dialog to finish
await dialogCoordinator.ShowMetroDialogAsync(this, custom);
break;
case "Slope":
break;
case "Plantation":
break;
case "Protected Object":
break;
case "Basic Info":
break;
case "Catchment":
break;
}
}
