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using System;
using System.Windows.Controls;
using System.Windows.Controls.Primitives;
using System.Windows.Media;
namespace CBR.Components.Designer
{
public class MoveThumb : Thumb
{
private DesignerItem designerItem;
private DesignerCanvas designerCanvas;
public MoveThumb()
{
DragStarted += new DragStartedEventHandler(this.MoveThumb_DragStarted);
DragDelta += new DragDeltaEventHandler(this.MoveThumb_DragDelta);
}
private void MoveThumb_DragStarted(object sender, DragStartedEventArgs e)
{
this.designerItem = DataContext as DesignerItem;
if (this.designerItem != null)
{
this.designerCanvas = VisualTreeHelper.GetParent(this.designerItem) as DesignerCanvas;
}
}
private void MoveThumb_DragDelta(object sender, DragDeltaEventArgs e)
{
if (this.designerItem != null && this.designerCanvas != null && this.designerItem.IsSelected)
{
double minLeft = double.MaxValue;
double minTop = double.MaxValue;
foreach (DesignerItem item in this.designerCanvas.SelectedItems)
{
minLeft = Math.Min(Canvas.GetLeft(item), minLeft);
minTop = Math.Min(Canvas.GetTop(item), minTop);
}
double deltaHorizontal = Math.Max(-minLeft, e.HorizontalChange);
double deltaVertical = Math.Max(-minTop, e.VerticalChange);
foreach (DesignerItem item in this.designerCanvas.SelectedItems)
{
Canvas.SetLeft(item, Canvas.GetLeft(item) + deltaHorizontal);
Canvas.SetTop(item, Canvas.GetTop(item) + deltaVertical);
}
this.designerCanvas.InvalidateMeasure();
e.Handled = true;
}
}
}
}
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WPF and MVVM fan, I practice C # in all its forms from the beginning of the NET Framework without mentioning C ++ / MFC and other software packages such as databases, ASP, WCF, Web & Windows services, Application, and now Core and UWP.
In my wasted hours, I am guilty of having fathered C.B.R. and its cousins C.B.R. for WinRT and UWP on the Windows store.
But apart from that, I am a great handyman ... the house, a rocket stove to heat the jacuzzi and the last one: a wood oven for pizza, bread, and everything that goes inside
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