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https://github.com/azaion/annotations.git
synced 2026-04-22 22:06:30 +00:00
I like it move it move it
This commit is contained in:
Oleksandr Bezdieniezhnykh
@@ -0,0 +1,334 @@
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using System.Windows;
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using System.Windows.Controls;
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using System.Windows.Documents;
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using System.Windows.Input;
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using System.Windows.Media;
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using System.Windows.Shapes;
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using Azaion.Annotator.DTO;
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using MediatR;
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using Color = System.Windows.Media.Color;
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using Rectangle = System.Windows.Shapes.Rectangle;
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namespace Azaion.Annotator.Controls;
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public class CanvasEditor : Canvas
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{
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private Point _lastPos;
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private readonly Rectangle _newAnnotationRect;
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private Point _newAnnotationStartPos;
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private readonly Line _horizontalLine;
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private readonly Line _verticalLine;
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private readonly TextBlock _classNameHint;
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private Rectangle _curRec;
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private AnnotationControl _curAnn;
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private const int MIN_SIZE = 20;
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public FormState FormState { get; set; }
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public IMediator Mediator { get; set; }
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private AnnotationClass _currentAnnClass;
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public AnnotationClass CurrentAnnClass
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{
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get => _currentAnnClass;
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set
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{
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_verticalLine.Stroke = value.ColorBrush;
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_verticalLine.Fill = value.ColorBrush;
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_horizontalLine.Stroke = value.ColorBrush;
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_horizontalLine.Fill = value.ColorBrush;
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_classNameHint.Text = value.Name;
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_newAnnotationRect.Stroke = value.ColorBrush;
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_newAnnotationRect.Fill = value.ColorBrush;
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_currentAnnClass = value;
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}
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}
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public readonly List<AnnotationControl> CurrentAnns = new();
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public CanvasEditor()
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{
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_horizontalLine = new Line
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{
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HorizontalAlignment = HorizontalAlignment.Stretch,
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Stroke = new SolidColorBrush(Colors.Blue),
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Fill = new SolidColorBrush(Colors.Blue),
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StrokeDashArray = [5],
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StrokeThickness = 2
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};
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_verticalLine = new Line
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{
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VerticalAlignment = VerticalAlignment.Stretch,
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Stroke = new SolidColorBrush(Colors.Blue),
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Fill = new SolidColorBrush(Colors.Blue),
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StrokeDashArray = [5],
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StrokeThickness = 2
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};
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_classNameHint = new TextBlock
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{
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Text = CurrentAnnClass?.Name ?? "asd",
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Foreground = new SolidColorBrush(Colors.Black),
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Cursor = Cursors.Arrow,
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FontSize = 16,
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FontWeight = FontWeights.Bold
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};
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_newAnnotationRect = new Rectangle
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{
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Name = "selector",
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Height = 0,
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Width = 0,
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Stroke = new SolidColorBrush(Colors.Gray),
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Fill = new SolidColorBrush(Color.FromArgb(128, 128, 128, 128)),
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};
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Loaded += Init;
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}
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private void Init(object sender, RoutedEventArgs e)
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{
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KeyDown += (_, args) =>
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{
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Console.WriteLine($"pressed {args.Key}");
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};
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MouseDown += CanvasMouseDown;
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MouseMove += CanvasMouseMove;
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MouseUp += CanvasMouseUp;
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SizeChanged += CanvasResized;
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Cursor = Cursors.Cross;
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_horizontalLine.X1 = 0;
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_horizontalLine.X2 = ActualWidth;
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_verticalLine.Y1 = 0;
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_verticalLine.Y2 = ActualHeight;
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Children.Add(_newAnnotationRect);
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Children.Add(_horizontalLine);
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Children.Add(_verticalLine);
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Children.Add(_classNameHint);
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}
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private void CanvasMouseDown(object sender, MouseButtonEventArgs e)
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{
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ClearSelections();
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NewAnnotationStart(sender, e);
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}
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private void CanvasMouseMove(object sender, MouseEventArgs e)
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{
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var pos = e.GetPosition(this);
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_horizontalLine.Y1 = _horizontalLine.Y2 = pos.Y;
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_verticalLine.X1 = _verticalLine.X2 = pos.X;
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SetLeft(_classNameHint, pos.X + 10);
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SetTop(_classNameHint, pos.Y - 30);
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if (e.LeftButton != MouseButtonState.Pressed)
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return;
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if (FormState.SelectionState == SelectionState.NewAnnCreating)
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NewAnnotationCreatingMove(sender, e);
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if (FormState.SelectionState == SelectionState.AnnResizing)
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AnnotationResizeMove(sender, e);
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if (FormState.SelectionState == SelectionState.AnnMoving)
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AnnotationPositionMove(sender, e);
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}
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private void CanvasMouseUp(object sender, MouseButtonEventArgs e)
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{
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if (FormState.SelectionState == SelectionState.NewAnnCreating)
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CreateAnnotation(e.GetPosition(this));
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FormState.SelectionState = SelectionState.None;
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e.Handled = true;
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}
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private void CanvasResized(object sender, SizeChangedEventArgs e)
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{
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_horizontalLine.X2 = e.NewSize.Width;
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_verticalLine.Y2 = e.NewSize.Height;
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}
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#region Annotation Resizing & Moving
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private void AnnotationResizeStart(object sender, MouseEventArgs e)
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{
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FormState.SelectionState = SelectionState.AnnResizing;
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_lastPos = e.GetPosition(this);
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_curRec = (Rectangle)sender;
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_curAnn = (AnnotationControl)((Grid)_curRec.Parent).Parent;
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e.Handled = true;
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}
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private void AnnotationResizeMove(object sender, MouseEventArgs e)
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{
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if (FormState.SelectionState != SelectionState.AnnResizing)
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return;
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var currentPos = e.GetPosition(this);
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var x = GetLeft(_curAnn);
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var y = GetTop(_curAnn);
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var offsetX = currentPos.X - _lastPos.X;
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var offsetY = currentPos.Y - _lastPos.Y;
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switch (_curRec.HorizontalAlignment, _curRec.VerticalAlignment)
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{
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case (HorizontalAlignment.Left, VerticalAlignment.Top):
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_curAnn.Width = Math.Max(MIN_SIZE, _curAnn.Width - offsetX);
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_curAnn.Height = Math.Max(MIN_SIZE, _curAnn.Height - offsetY);
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SetLeft(_curAnn, x + offsetX);
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SetTop(_curAnn, y + offsetY);
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break;
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case (HorizontalAlignment.Center, VerticalAlignment.Top):
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_curAnn.Height = Math.Max(MIN_SIZE, _curAnn.Height - offsetY);
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SetTop(_curAnn, y + offsetY);
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break;
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case (HorizontalAlignment.Right, VerticalAlignment.Top):
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_curAnn.Width = Math.Max(MIN_SIZE, _curAnn.Width + offsetX);
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_curAnn.Height = Math.Max(MIN_SIZE, _curAnn.Height - offsetY);
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SetTop(_curAnn, y + offsetY);
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break;
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case (HorizontalAlignment.Left, VerticalAlignment.Center):
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_curAnn.Width = Math.Max(MIN_SIZE, _curAnn.Width - offsetX);
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SetLeft(_curAnn, x + offsetX);
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break;
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case (HorizontalAlignment.Right, VerticalAlignment.Center):
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_curAnn.Width = Math.Max(MIN_SIZE, _curAnn.Width + offsetX);
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break;
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case (HorizontalAlignment.Left, VerticalAlignment.Bottom):
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_curAnn.Width = Math.Max(MIN_SIZE, _curAnn.Width - offsetX);
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_curAnn.Height = Math.Max(MIN_SIZE, _curAnn.Height + offsetY);
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SetLeft(_curAnn, x + offsetX);
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break;
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case (HorizontalAlignment.Center, VerticalAlignment.Bottom):
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_curAnn.Height = Math.Max(MIN_SIZE, _curAnn.Height + offsetY);
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break;
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case (HorizontalAlignment.Right, VerticalAlignment.Bottom):
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_curAnn.Width = Math.Max(MIN_SIZE, _curAnn.Width + offsetX);
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_curAnn.Height = Math.Max(MIN_SIZE, _curAnn.Height + offsetY);
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break;
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}
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_lastPos = currentPos;
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}
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private void AnnotationPositionStart(object sender, MouseEventArgs e)
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{
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_lastPos = e.GetPosition(this);
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_curAnn = (AnnotationControl)sender;
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if (!Keyboard.IsKeyDown(Key.LeftCtrl) && !Keyboard.IsKeyDown(Key.RightCtrl))
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ClearSelections();
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_curAnn.IsSelected = true;
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FormState.SelectionState = SelectionState.AnnMoving;
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e.Handled = true;
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}
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private void AnnotationPositionMove(object sender, MouseEventArgs e)
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{
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if (FormState.SelectionState != SelectionState.AnnMoving)
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return;
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var currentPos = e.GetPosition(this);
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var offsetX = currentPos.X - _lastPos.X;
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var offsetY = currentPos.Y - _lastPos.Y;
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SetLeft(_curAnn, GetLeft(_curAnn) + offsetX);
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SetTop(_curAnn, GetTop(_curAnn) + offsetY);
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_lastPos = currentPos;
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e.Handled = true;
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}
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#endregion
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#region NewAnnotation
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private void NewAnnotationStart(object sender, MouseButtonEventArgs e)
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{
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_newAnnotationStartPos = e.GetPosition(this);
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SetLeft(_newAnnotationRect, _newAnnotationStartPos.X);
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SetTop(_newAnnotationRect, _newAnnotationStartPos.Y);
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_newAnnotationRect.MouseMove += NewAnnotationCreatingMove;
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FormState.SelectionState = SelectionState.NewAnnCreating;
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}
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private void NewAnnotationCreatingMove(object sender, MouseEventArgs e)
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{
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if (FormState.SelectionState != SelectionState.NewAnnCreating)
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return;
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var currentPos = e.GetPosition(this);
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var diff = currentPos - _newAnnotationStartPos;
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_newAnnotationRect.Height = Math.Abs(diff.Y);
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_newAnnotationRect.Width = Math.Abs(diff.X);
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if (diff.X < 0)
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SetLeft(_newAnnotationRect, currentPos.X);
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if (diff.Y < 0)
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SetTop(_newAnnotationRect, currentPos.Y);
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}
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private void CreateAnnotation(Point endPos)
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{
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_newAnnotationRect.Width = 0;
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_newAnnotationRect.Height = 0;
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var width = Math.Abs(endPos.X - _newAnnotationStartPos.X);
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var height = Math.Abs(endPos.Y - _newAnnotationStartPos.Y);
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if (width < MIN_SIZE || height < MIN_SIZE)
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return;
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var annotationControl = new AnnotationControl(CurrentAnnClass, AnnotationResizeStart)
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{
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Width = width,
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Height = height
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};
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annotationControl.MouseDown += AnnotationPositionStart;
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SetLeft(annotationControl, Math.Min(endPos.X, _newAnnotationStartPos.X));
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SetTop(annotationControl, Math.Min(endPos.Y, _newAnnotationStartPos.Y));
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Children.Add(annotationControl);
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CurrentAnns.Add(annotationControl);
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_newAnnotationRect.Fill = new SolidColorBrush(CurrentAnnClass.Color);
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}
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public AnnotationControl CreateAnnotation(AnnotationClass annClass, AnnotationInfo info)
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{
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var annotationControl = new AnnotationControl(annClass, AnnotationResizeStart)
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{
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Width = info.Width,
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Height = info.Height
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};
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annotationControl.MouseDown += AnnotationPositionStart;
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SetLeft(annotationControl, info.X );
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SetTop(annotationControl, info.Y);
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Children.Add(annotationControl);
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CurrentAnns.Add(annotationControl);
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_newAnnotationRect.Fill = new SolidColorBrush(annClass.Color);
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return annotationControl;
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}
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#endregion
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public void RemoveAnnotations(IEnumerable<AnnotationControl> listToRemove)
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{
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foreach (var ann in listToRemove)
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{
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Children.Remove(ann);
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CurrentAnns.Remove(ann);
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}
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}
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public void RemoveAllAnns() => RemoveAnnotations(CurrentAnns.ToList());
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public void RemoveSelectedAnns() => RemoveAnnotations(CurrentAnns.Where(x => x.IsSelected).ToList());
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private void ClearSelections()
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{
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foreach (var ann in CurrentAnns)
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ann.IsSelected = false;
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}
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}
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