Question

i am trying to develop a remote desktop apps with c#. so i have couple of question regarding mouse coordinate calculation based on picture box

1. suppose i have picture box and i want to capture mouse coordinate when i will move my mouse
   on that picture box in c#?

2. if i click at location (200, 300) on my picture box. then how can i determine
   programmatically resolution of picture box and convert that (200,300) coordinate based on
   that resolution.

3. when i will send (x, y) coordinate to other machine and if that pc has resolution have like
   1024×768 then what logic i need to use to convert (x, y) according to that pc resolution

if possible help me with small sample code for my question. thanks

Answer 1

Simple, the easiest way is to transform your coordinates to a normalized form (ranging from 0 to 1). Then you can use these normalized coordinates to calculate the mousePosition on another resolution. This way the devices don’t need to know the other devices resolution.

So:

//First Normalize the clickPosition using the current resolution
//clickPos(200,300) and resolution(800,600) => normalized(0.25,0.5)
var normalized = clickPos/resolution;

//Now you can send this information to the other device
//The other device uses the normalized parameter to calculate the mouseClick with his  resolution
//normalized(0.25,0.5) and otherResolution(1280,720) => otherDeviceClickPos(320, 360)
var otherDeviceClickPos = normalized * otherResolution;