Get position on a Canvas with Canvas.GetLeft

     

<Canvas xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    x:Class="Thumb_wcp.Pane1">
  <Canvas Width="100" Height="100" Name="myCanvasStretch">
    <TextBox Name="changes" 
         Width="{Binding ElementName=myCanvasStretch,Path=Width}"  
         Height="{Binding ElementName=myCanvasStretch,Path=Height}" 
         Text="Size: 100, 100"/>
    <Thumb Name="myThumb" Canvas.Left="80" Canvas.Top="80" Background="Blue" 
          Width="20" Height="20" DragDelta="onDragDelta"/>
  </Canvas>
</Canvas>

//File:Window.xaml.vb

Imports System
Imports System.Windows
Imports System.Windows.Controls
Imports System.Windows.Controls.Primitives
Imports System.Windows.Documents
Imports System.Windows.Navigation
Imports System.Windows.Shapes
Imports System.Windows.Data
Imports System.Windows.Media

Namespace Thumb_wcp
  Public Partial Class Pane1
    Inherits Canvas
    Private Sub onDragDelta(sender As Object, e As DragDeltaEventArgs)
      Dim yadjust As Double = myCanvasStretch.Height + e.VerticalChange
      Dim xadjust As Double = myCanvasStretch.Width + e.HorizontalChange
      If (xadjust >= 0) AndAlso (yadjust >= 0) Then
        myCanvasStretch.Width = xadjust
        myCanvasStretch.Height = yadjust
        Canvas.SetLeft(myThumb, Canvas.GetLeft(myThumb) + e.HorizontalChange)
        Canvas.SetTop(myThumb, Canvas.GetTop(myThumb) + e.VerticalChange)
        Console.WriteLine(myCanvasStretch.Width)
        Console.WriteLine(myCanvasStretch.Height)
      End If
    End Sub

  End Class
End Namespace

Related examples in the same category

1.	Align Button along with Canvas position
2.	Using a Canvas to absolutely position elements
3.	Simple Canvas
4.	StackPanel Demo and Canvas
5.	Canvas with MinHeight and MinWidth
6.	Draws a Path element within a Canvas
7.	Draws several Line elements within a Canvas
8.	Draws several Polyline elements within a Canvas
9.	Rectangle with Fill and Canvas position
10.	Custom Coordinates by transforming the Canvas
11.	Draw path on a Canvas
12.	Use Canvas coordination
13.	Use Canvas to layout Buttons and Labels
14.	Position UI Elements Using Exact Coordinates
15.	Pixel Snapped
16.	Positioning Rectangle on a Canvas
17.	Canvas inside canvas, showing relative absolute positioning
18.	Aligning elements using multiple attached properties of Canvas
19.	Layer elements in a Canvas element
20.	Use the four attached properties of the Canvas element: Bottom, Left, Right, and Top
21.	Canvas PreviewMouseDown action and MouseDown action
22.	Handles the MouseDown event on the Canvas
23.	StatusBar inside a Canvas
24.	Drag Items from a List and Drop Them on a Canvas
25.	Print Visual(Canvas)
26.	Use a Thumb to resize a Canvas control by responding to the DragDelta event.
27.	Canvas Positioning Properties Sample
28.	Canvas.SetTop
29.	Canvas.SetBottom
30.	Canvas.SetRight
31.	Add buttons to a Canvas with code
32.	Set control position for Canvas

Get position on a Canvas with Canvas.GetLeft : Canvas « Windows Presentation Foundation « VB.Net

Related examples in the same category