C#.codebox 7
WPF – How to detect a mouse double click on an Image?
1 2 3 4 5 6 7 8 9 10 | //Left button down void Image_MouseLeftButtonDown(object sender, MouseButtonEventArgs e) { myImage = (Image)sender; if (e.ClickCount == 2) //if double clicked { //my code } } |
C#.codebox 6
WPF – How to get the location of a control?
1 2 3 4 5 6 7 | private Point GetControlLocation(UIElement myControl) { Vector vector = VisualTreeHelper.GetOffset(myControl); Point currentPoint = new Point(vector.X, vector.Y); return currentPoint; } |
C#.codebox 5
WPF – How to drag an Image with the mouse?
The code below was used in ShortcutMan.G 3.0 to drag an image around the window (a TabItem in this case) with the mouse.
The image is contained within a Canvas which is contained within a TabItem.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 | Image myImage = null; //selected image Boolean MouseIsDown = false; //mouse down state //Left button down - when the mouse button is down in the image void Image_MouseLeftButtonDown(object sender, MouseButtonEventArgs e) { myImage = (Image)sender; if (e.ClickCount == 1) //if one click { //Drag image TabItem Tab = (TabItem)TabControl1.SelectedItem; Canvas TabCanvas = (Canvas)Tab.Content; ////Get mouse coordinates and center the cursor in the image (optional) Point mouseCoordinates = new Point(e.GetPosition(TabCanvas).X, e.GetPosition(TabCanvas).Y); Canvas.SetLeft(myImage, mouseCoordinates.X - (myImage.Width / 2)); Canvas.SetTop(myImage, mouseCoordinates.Y - (myImage.Height / 2)); //Update mouse state MouseIsDown = true; } } //Left button up - when the mouse button goes up void Image_MouseLeftButtonUp(object sender, MouseButtonEventArgs e) { //Update mouse state MouseIsDown = false; } //Mouse leave - when the mouse button leaves the image void Image_MouseLeave(object sender, MouseEventArgs e) { //Update mouse state MouseIsDown = false; } //Mouse move - when the mouse moves void Image_MouseMove(object sender, MouseEventArgs e) { if (myImage != null && MouseIsDown) //if there's an image selected and if mouse is down { TabItem Tab = (TabItem)TabControl1.SelectedItem; Canvas TabCanvas = (Canvas)Tab.Content; //Get mouse coordinates Point mouseCoordinates = new Point(e.GetPosition(TabCanvas).X, e.GetPosition(TabCanvas).Y); //Set limits - the limits within the tab (optional) if (mouseCoordinates.X < 0) mouseCoordinates.X = 0; if (mouseCoordinates.Y < 0) mouseCoordinates.Y = 0; if (mouseCoordinates.X > TabCanvas.Width) mouseCoordinates.X = TabCanvas.Width; if (mouseCoordinates.Y > TabCanvas.Height) mouseCoordinates.Y = TabCanvas.Height; //Update image location Canvas.SetLeft(myImage, mouseCoordinates.X - (myImage.Width / 2)); Canvas.SetTop(myImage, mouseCoordinates.Y - (myImage.Height / 2)); } } |
C#.codebox 3
WPF – How to set the tab order in XAML Designer in VS2008?
Unfortunately, currently there is no simple way to do this (like in Windows Forms, with View->Tab Order).
An easy way to do it, is to use the properties window search functionality to filter only the TabIndex property and then apply appropriate values for each control. However, when your window is loaded you have to press the TAB key at least once, to set the focus on the first control in the tab order.
To do this automatically though, and to select/set focus on a control at runtime, you can do something like:
1 2 3 4 5 | //Load private void Window_Loaded(object sender, RoutedEventArgs e) { TextBox1.Focus(); //set focus on a textbox } |
C#.codebox 1
WPF – How to get the parent window of a control?
1 | Window thisControl_Window = Window.GetWindow(this); |
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