[examples] Add core_monitor_change

[maiconpintoabreu]

Add an example to show how to get information about the monitor and move a window to another monitor.

Added for: #5209

[maiconpintoabreu]

Based on the other PR, I will add more comments here as well.

[raysan5]

@maiconpintoabreu Considering raylib offers some monitor checking functionality, it would be great to use it on the example:

void SetWindowMonitor(int monitor);                 // Set monitor for the current window
int GetMonitorCount(void);                          // Get number of connected monitors
int GetCurrentMonitor(void);                        // Get current monitor where window is placed
Vector2 GetMonitorPosition(int monitor);            // Get specified monitor position
int GetMonitorWidth(int monitor);                   // Get specified monitor width (current video mode used by monitor)
int GetMonitorHeight(int monitor);                  // Get specified monitor height (current video mode used by monitor)
int GetMonitorPhysicalWidth(int monitor);           // Get specified monitor physical width in millimetres
int GetMonitorPhysicalHeight(int monitor);          // Get specified monitor physical height in millimetres
int GetMonitorRefreshRate(int monitor);             // Get specified monitor refresh rate
Vector2 GetWindowPosition(void);                    // Get window position XY on monitor
const char *GetMonitorName(int monitor);            // Get the human-readable, UTF-8 encoded name of the specified monitor

For example, have some keys to move window to the available monitors, show available monitors, show monitor names, physical size...

[raysan5]

@maiconpintoabreu As the monitor layouts can be now detected and also current window, I think it would be nice to visualize with a rectangle the current window and how it is moved between monitors in real time.

[maiconpintoabreu]

The monitor that the window is will be highlighted and it happens as well if the window is moved manually.

You can see it on the screenshot that the active one is in red.

[maiconpintoabreu]

Monitor position drawing realtime now.

[raysan5]

@maiconpintoabreu Example looks good, but why not show the information in the same way as the tool you are using, with the monitor name and resolution inside the rectangles. Seems more complete to me than just a number.

[maiconpintoabreu]

Hi, just confirmed that on Windows the monitor name is right, added the windows position in monitor rectangles(scaled) and infos inside the monitor rectangle as well.

[maiconpintoabreu]

I got this issue:

This closes the window when a monitor is removed while the example is trying to access the monitor information.

WARNING: GLFW: Error: 65544 Description: X11: Failed to query video mode
WARNING: GLFW: Failed to find video mode for selected monitor
WARNING: GLFW: Error: 65544 Description: X11: Failed to query video mode
WARNING: GLFW: Failed to find video mode for selected monitor
WARNING: GLFW: Error: 65544 Description: X11: Failed to query video mode
WARNING: GLFW: Failed to find video mode for selected monitor
WARNING: GLFW: Error: 65544 Description: X11: Failed to query video mode

[raysan5]

@maiconpintoabreu Thanks for the new example and all the imrpovements implemented!

About the GLFW issue... it should be reviewed. Please, could you open a separate issue for it? Thanks!

[maiconpintoabreu]

Hi @raysan5, It was easier to send the fix PR for the monitor issue: #5235