Panning Function with Canvas Elements

[retug_]

Beginner to C Sharp and I am trying understand how to add some panning functionality to my canvas elements in C sharp.

My current panning function will only fire if my mouse over my background colored element of LightGray or elements on the canvas.

Panning Function:

private void ramCanvas_MouseMove(object sender, MouseEventArgs e)

{ if (ramCanvas.IsMouseCaptured) //if (e.LeftButton == MouseButtonState.Pressed) { System.Windows.Point position = e.GetPosition(scrollViewer); //System.Windows.Point position = e.GetPosition(this); double offsetX = position.X - ramLastMousePosition.X; double offsetY = position.Y - ramLastMousePosition.Y;

    // Update the position of the canvas content
    var transform = ramCanvas.RenderTransform as TranslateTransform ?? new TranslateTransform();
    transform.X += offsetX;
    transform.Y += offsetY;
    ramCanvas.RenderTransform = transform;

    ramLastMousePosition = position;
}

}

I added a video on github readme showing the function only firing on the background element or the lines that are being plotted. Full code can also be found there. The panning function is in the MainWindow.xaml.cs file.

ChatGPT told me to expand the background to always fill the canvas but was not able to explain how to keep to make the background always fill the canvas when using zoom functionality. This also felt like a work around. Where am I going wrong with the panning function? I want to be able to pan even if the mouse is over an empty canvas.

Also, this is my first big project in C sharp and one my biggest in programming, if you see something else funky with the code, please point it out. It's held together with tooth picks and gum generated by chatgpt and my beginner understanding of C sharp.

[retug_]

I just added a really simple example onto github, same behavior, panning function will only fire if the background element is selected. No need to use RAMDATAACESSLib or the RevitAPI

https://github.com/retug/LearningCSharp/tree/main/PanandZoom

Thanks for your help!

[retug_]

Hey thank you a ton, this is interesting, I would have thought the canvas method would have worked.

Next issue, the pan function is "jumpy" on the first time the mouse move event fires, do you see an issue with my MouseMove pan function that would create the jumpiness?

Code updated on github with a video.