How can I hide the cursor in a WPF window that is fully transparent (alpha=0).
I tried the usual
this.Cursor = System.Windows.Input.Cursors.None;
and it works on areas with content where alpha > 0 but when the cursor moves to an area - in the same window - where the background is fully transparent the cursor re-appears.
I also added
System.Windows.Input.Mouse.OverrideCursor = System.Windows.Input.Cursors.None;
but that didn't help.
I realize that setting the alpha of background to 1 might be a solution but for various reasons this creates other problems...
Maybe as a work-around you can create a tiny non-transparent area somewhere, and move the mouse there just before hiding it:
// Coordinates of your non-transparent area:
var x = 10;
var y = 10;
System.Windows.Forms.Cursor.Position = new System.Drawing.Point(x, y);
this.Cursor = System.Windows.Input.Cursors.None;
Related
I created painting app, where i can paint on Panel, however, the change (what i paint) is shown only when i minimize window (form) and then open it again. I want to see what i paint immediately.
Steps to reproduce:
Panel panel = new Panel();
//adding panel to view
Bitmap bitmap = new Bitmap(width, height);
Graphics g = Graphics.FromImage(bitmap);
panel.BackgroundImage = bitmap;
//painting something on g
Solution was to use PictureBox instead of Panel, Painting on it became visible and more smooth.
I need to know how I could dynamically resize a label in a WPF application.
I've already found a sample in this article which has already achieved both dragging and resizing a label at the same time.
I dug into the code, and to make it short, I found out that inside OnMouseMove event of the label, it checks the mouse cursor shape and if it was Hand it will do the dragging and if it was either of the resizing arrows it will do the resizing correspondingly.
Check it out. you'll see.
In this certain example I couldn't manage to find out how the cursor shape changes to resizing arrows when the mouse is hovered on the label's border.
So
I either need to find out 'how I could change the mouse cursor shape to resizing arrows when hovered on a label's border', OR to find a new approach to resize a label, dynamically.
Changing the cursor is done via the this.Cursor property.
I opened the code in the article and saw how they do it...
In the OnMouseMove the cursor is changed if the left mouse button is NOT clicked:
Point currentLocation = e.MouseDevice.GetPosition(wnd);
......
......
const int dragHandleWidth = 3;
var bottomHandle = new Rect(0, height - dragHandleWidth, width, dragHandleWidth);
var rightHandle = new Rect(width - dragHandleWidth, 0, dragHandleWidth, height);
Point relativeLocation = wnd.TranslatePoint(currentLocation, this);
if (rightHandle.Contains(relativeLocation))
{
this.Cursor = Cursors.SizeWE;
}
else if (bottomHandle.Contains(relativeLocation))
{
this.Cursor = Cursors.SizeNS;
}
else
{
this.Cursor = Cursors.Hand;
}
In other words, they check if the current mouse location is within 3 px of the bottom or right border, if it is, they change the cursor accordingly...
You can easily change this logic to suite your needs....
I'm trying to create transparent floating dockable window. But, having difficulting achieving this. Tried Opacity, but no luck.
Here is a snapshot of my code :
// Floating dockable split pane
SplitPane splitFloating = new SplitPane();
XamDockManager.SetInitialLocation(splitFloating, InitialPaneLocation.DockableFloating);
XamDockManager.SetFloatingLocation(splitFloating, new Point(my.XCoordinate, my.YCoordinate));
XamDockManager.SetFloatingSize(splitFloating, new Size(my.Width, my.Height));
TabGroupPane tgpFloating = new TabGroupPane();
ContentPane cpRichText = new ContentPane();
cpRichText.Content = new RichTextBox();
cpRichText.Opacity = 0.0;
tgpFloating.Items.Add(cpRichText);
tgpFloating.Opacity = 0.0;
splitFloating.Panes.Add(tgpFloating);
splitFloating.Opacity = 0.0;
this.DockManager.Panes.Add(splitFloating);
this.DockManager.Opacity = 0.0;
I don't know much about the Infragistics suite, but generally speaking you should set you Background to Transparent (if you want to be able to click on the background) or {x:Null} (if you want to click through the background).
Also if it's a window (derives from System.Windows.Controls.Window), you'll need to set AllowsTransparency to true as well, but this might incur some loss of performance.
I have a panel, within that panel are several rectangular controls (the number of controls vaires) I want the user to be able to move the controls around within the panel so that they can arrange the controls in the way that suits them best. does anyone have any resources i could read or simple tips which would get me headed down the right road?
thanks
I figured out a possible, simple method of moving a control in a drag/move style... Here are the steps.
Select an element in your control which you wish to be the movement area. This is the area in which, if me user holds the mouse down, the control will move. In my case it was a rectangular border at the top of the control.
Use the OnMouseDown event to set a boolean (in my case IsMoving) to true and the MouseUp event to set it to false
On the first MouseDown event, set some Point property (InitialPosition) using the following code
if (FirstClick)
{
GeneralTransform transform = this.TransformToAncestor(this.Parent as Visual);
Point StartPoint = transform.Transform(new Point(0, 0));
StartX = StartPoint.X;
StartY = StartPoint.Y;
FirstClick = false;
}
Now that you have the starting position, you need to get the position of the mouse relative to your movement control. This is so you dont end up clicking the middle of your header to move it and it instantly moves the top left of the control to the mouse pointer location. To do this, place this code in the MouseDown event:
Point RelativeMousePoint = Mouse.GetPosition(Header);
RelativeX = RelativeMousePoint.X;
RelativeY = RelativeMousePoint.Y;
Now you have the point the control originated at (startX and STartY), the position of the mouse within your movement control (RelativeX, RelativeY), we just need to move the control to a new location! There are a few steps involved in doing this. Firstly your control needs to have a RenderTransform which is a TranslateTransform. If you dont want to set this in XAML, feel free to set it using this.RenderTransform = new TranslateTransform.
Now we need to set the X and Y coordinates on the RenderTransform so that the control will move to a new location. The following code accomplishes this
private void Header_MouseMove(object sender, MouseEventArgs e)
{
if (IsMoving)
{
//Get the position of the mouse relative to the controls parent
Point MousePoint = Mouse.GetPosition(this.Parent as IInputElement );
//set the distance from the original position
this.DistanceFromStartX= MousePoint.X - StartX - RelativeX ;
this.DistanceFromStartY= MousePoint.Y - StartY - RelativeY;
//Set the X and Y coordinates of the RenderTransform to be the Distance from original position. This will move the control
TranslateTransform MoveTransform = base.RenderTransform as TranslateTransform;
MoveTransform.X = this.DistanceFromStartX;
MoveTransform.Y = this.DistanceFromStartY;
}
}
As you can guess, there is a bit of code left off(variable declarations etc) but this should be all you need to get you started :) happy coding.
EDIT:
One problem you may encounter is that this allows you to move the control out of the area of its parent control. Here is some quick and dirty code to fix that issue...
if ((MousePoint.X + this.Width - RelativeX > Parent.ActualWidth) ||
MousePoint.Y + this.Height - RelativeY > Parent.ActualHeight ||
MousePoint.X - RelativeX < 0 ||
MousePoint.Y - RelativeY < 0)
{
IsMoving = false;
return;
}
Place this code in your MouseMove event before the actual movement takes place. This will check if the control is trying to move outside the bounds of the parent control. The IsMoving = false command will cause the control to exit movement mode. This means that the user will need to click the movement area again to try to move the control as it will have stopped at the boundary. If you want the control to automatically continue movement, just take that line out and the control will jump back onto the cursor as soon as it is back in a legal area.
You can find a lot of inspiration here:
http://www.codeproject.com/KB/WPF/WPFDiagramDesigner_Part1.aspx
http://www.codeproject.com/KB/WPF/WPFDiagramDesigner_Part2.aspx
http://www.codeproject.com/KB/WPF/WPFDiagramDesigner_Part3.aspx
http://www.codeproject.com/KB/WPF/WPFDiagramDesigner_Part4.aspx
How do you get an image to be reflected in wpf without using the xaml? I have a rectangle with a BitmapImageBrush as its fill. I want to be able to regularly flip this image (X-axis) back and forth at will in C#. I've read about using the ScaleTransform property but this only seems to work in the xaml and that's not what I want.
This is how the image is created:
ImageBrush l = new ImageBrush(new BitmapImage(new Uri(uriPath, UriKind.Relative)));
_animation.Add(l);
_visual = new Rectangle();
_visual.Fill = _animation[0];
_visual.Width = width;
_visual.Height = height;
_visual.Visibility = Visibility.Visible;
_window.GameCanvas.Children.Add(_visual);
_animation is a list of ImageBrushes.
This is really simple, yet I can't seem to figure out how to do it. Please help.
You can still add a scale transform programmatically, rather than using xaml.
For instance, in this article.
To do the flip, set your scale transform to be negative in the direction you want to flip (ie, if horizontal, set x to -1, or -desiredScale if you also want to resize).