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POUsing Shift key Multi selection of checkbox( Find Controls within 2 points/ rectangle
 

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  1. POUsing Shift key Multi selection of checkbox( Find Controls within 2 points/ rectangle
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    <p>In order to select multiple checkbox within Wrap panel using Shift Key.</p> <p>Capturing the Mouse down event position on Shift Keydown, on second mouse down with shift keydown, getting the 2 positions of the selection, then Need to Select the checkbox control with in the selected area.</p> <p>How do I find the controls within 2 positions (System.Window.Point) or System.Windows.rect. The following code is selecting all of the checkbox within the wrappanel(lesscolorpanel).</p> <pre><code> private System.Windows.Point startPoint; System.Windows.Point checkpPoint; private System.Windows.Point PointWhereMouseIs; private void LessColourPanel_OnPreviewMouseDown(object sender, MouseButtonEventArgs e) { if (Keyboard.IsKeyDown(Key.LeftShift) || Keyboard.IsKeyDown(Key.RightShift)) { if (startPoint == checkpPoint) { //GET THE MOUSE POSITION startPoint = Mouse.GetPosition(lessColourPanel); PointWhereMouseIs = checkpPoint; } else if(PointWhereMouseIs==checkpPoint) { //CAPTURE END MOUSE POSITION PointWhereMouseIs = Mouse.GetPosition(lessColourPanel); //FIND CONTROLS WIHIN RECTANGLE Rect selareaRect = new Rect(startPoint, PointWhereMouseIs); foreach (System.Windows.Controls.CheckBox chkitemBox in FindVisualChildren&lt;System.Windows.Controls.CheckBox&gt;(lessColourPanel)) { var rectBounds = VisualTreeHelper.GetDescendantBounds(chkitemBox); Vector vector = VisualTreeHelper.GetOffset(chkitemBox); rectBounds.Offset(vector); if (rectBounds.IntersectsWith(selareaRect)) { chkitemBox.IsChecked = true; } } startPoint = checkpPoint; } } } </code></pre>
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    1. USJay
    1. USJay
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    1. CODon't create or manipulate UI elements in procedural code in WPF. That's what XAML is for. Delete all this code and use an `ItemsControl` and a proper ViewModel for this.
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      1. USFederico Berasategui
    2. CO@highcore, Thanks for that,but how does it helps me achieving multiselection using shift key, would you be able to give me an example?
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      1. USJay
    3. COI'm not sure what you're trying to achieve. A `CheckBox` does not have anything to do with any other CheckBox by default. Therefore you will get multi selection without pressing shift or any other key.
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      1. POUsing Shift key Multi selection of checkbox( Find Controls within 2 points/ rectangle
      1. USFederico Berasategui
 

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