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using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Controls.Primitives;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Shapes;
namespace Tango.FSE.Diagnostics.Controls
{
public class DiagnosticsSelectionGrid : DiagnosticsGrid
{
private List<Rectangle> _rects;
private Point _mouseDownLocation;
private bool _isMouseDown;
private List<Rectangle> _selectionRects;
public Brush RectanglesBackgroundBrush
{
get { return (Brush)GetValue(RectanglesBackgroundBrushProperty); }
set { SetValue(RectanglesBackgroundBrushProperty, value); }
}
public static readonly DependencyProperty RectanglesBackgroundBrushProperty =
DependencyProperty.Register("RectanglesBackgroundBrush", typeof(Brush), typeof(DiagnosticsSelectionGrid), new PropertyMetadata(new SolidColorBrush(Color.FromRgb(25, 25, 25))));
public Brush RectanglesHighlightBrush
{
get { return (Brush)GetValue(RectanglesHighlightBrushProperty); }
set { SetValue(RectanglesHighlightBrushProperty, value); }
}
public static readonly DependencyProperty RectanglesHighlightBrushProperty =
DependencyProperty.Register("RectanglesHighlightBrush", typeof(Brush), typeof(DiagnosticsSelectionGrid), new PropertyMetadata(new SolidColorBrush(Color.FromRgb(30, 30, 30))));
public Rect SelectionRect
{
get { return (Rect)GetValue(SelectionRectProperty); }
set { SetValue(SelectionRectProperty, value); }
}
public static readonly DependencyProperty SelectionRectProperty =
DependencyProperty.Register("SelectionRect", typeof(Rect), typeof(DiagnosticsSelectionGrid), new PropertyMetadata(default(Rect)));
public ICommand SelectionCommand
{
get { return (ICommand)GetValue(SelectionCommandProperty); }
set { SetValue(SelectionCommandProperty, value); }
}
public static readonly DependencyProperty SelectionCommandProperty =
DependencyProperty.Register("SelectionCommand", typeof(ICommand), typeof(DiagnosticsSelectionGrid), new PropertyMetadata(null));
public ICommand RightClickCommand
{
get { return (ICommand)GetValue(RightClickCommandProperty); }
set { SetValue(RightClickCommandProperty, value); }
}
public static readonly DependencyProperty RightClickCommandProperty =
DependencyProperty.Register("RightClickCommand", typeof(ICommand), typeof(DiagnosticsSelectionGrid), new PropertyMetadata(null));
public SelectionMode SelectionMode
{
get { return (SelectionMode)GetValue(SelectionModeProperty); }
set { SetValue(SelectionModeProperty, value); }
}
public static readonly DependencyProperty SelectionModeProperty =
DependencyProperty.Register("SelectionMode", typeof(SelectionMode), typeof(DiagnosticsSelectionGrid), new PropertyMetadata(SelectionMode.Multiple));
static DiagnosticsSelectionGrid()
{
DefaultStyleKeyProperty.OverrideMetadata(typeof(DiagnosticsSelectionGrid), new FrameworkPropertyMetadata(typeof(DiagnosticsSelectionGrid)));
}
public DiagnosticsSelectionGrid()
{
_rects = new List<Rectangle>();
_selectionRects = new List<Rectangle>();
Cursor = Cursors.Cross;
Background = Brushes.Transparent;
}
public void ClearSelection()
{
_selectionRects.Clear();
foreach (var rect in _rects)
{
rect.Fill = RectanglesBackgroundBrush;
}
}
protected override void LoadDefinitions()
{
base.LoadDefinitions();
if (Rows != null && Columns != null)
{
_rects.Clear();
_selectionRects.Clear();
Children.Clear();
for (int columnIndex = 0; columnIndex < Columns.Count; columnIndex++)
{
for (int rowIndex = 0; rowIndex < Rows.Count; rowIndex++)
{
var rect = new Rectangle();
rect.Margin = new Thickness(1);
rect.Fill = RectanglesBackgroundBrush;
rect.IsHitTestVisible = false;
Grid.SetColumn(rect, columnIndex);
Grid.SetRow(rect, rowIndex);
Children.Add(rect);
_rects.Add(rect);
}
}
}
}
protected override void OnPreviewMouseDown(MouseButtonEventArgs e)
{
base.OnPreviewMouseDown(e);
if (SelectionMode == SelectionMode.Single) return;
if (e.ChangedButton == MouseButton.Left)
{
_mouseDownLocation = e.GetPosition(this);
_isMouseDown = true;
}
}
protected override void OnPreviewMouseUp(MouseButtonEventArgs e)
{
base.OnPreviewMouseUp(e);
_isMouseDown = false;
if (e.ChangedButton == MouseButton.Right)
{
RightClickCommand?.Execute(null);
return;
}
if (_selectionRects.Count > 0)
{
var column = _selectionRects.Min(x => Grid.GetColumn(x));
var row = _selectionRects.Min(x => Grid.GetRow(x));
var columnSpan = Math.Max(_selectionRects.Max(x => Grid.GetColumn(x)) - column + 1, 1);
var rowSpan = Math.Max(_selectionRects.Max(x => Grid.GetRow(x)) - row + 1, 1);
SelectionRect = new Rect(column, row, columnSpan, rowSpan);
SelectionCommand?.Execute(SelectionRect);
ClearSelection();
}
}
protected override void OnPreviewMouseMove(MouseEventArgs e)
{
base.OnPreviewMouseMove(e);
if (SelectionMode == SelectionMode.Single)
{
var position = e.GetPosition(this);
var selection = new Rect(position.X, position.Y, 1, 1);
HighlightIntersections(selection);
}
else if (_isMouseDown)
{
var position = e.GetPosition(this);
var x = Math.Min(position.X, _mouseDownLocation.X);
var y = Math.Min(position.Y, _mouseDownLocation.Y);
var w = Math.Max(position.X, _mouseDownLocation.X) - Math.Min(_mouseDownLocation.X, position.X);
var h = Math.Max(position.Y, _mouseDownLocation.Y) - Math.Min(_mouseDownLocation.Y, position.Y);
var selection = new Rect(x, y, w, h);
HighlightIntersections(selection);
}
}
private void HighlightIntersections(Rect selection)
{
_selectionRects.Clear();
foreach (var rect in _rects)
{
GeneralTransform gt = rect.TransformToAncestor(this);
var rectBounds = gt.TransformBounds(new Rect(0, 0, rect.ActualWidth, rect.ActualHeight));
if (selection.IntersectsWith(rectBounds))
{
rect.Fill = RectanglesHighlightBrush;
_selectionRects.Add(rect);
}
else
{
rect.Fill = RectanglesBackgroundBrush;
}
}
}
}
}
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