Add window_has_focus usage example

public/usage-examples/windows/window_has_focus-1-example-oop.cs

@@ -0,0 +1,38 @@
+using SplashKitSDK;
+
+namespace WindowHasFocusExample
+{
+    public class Program
+    {
+        public static void Main()
+        {
+            SplashKit.OpenWindow("Window Has Focus", 800, 600);
+
+            while (!SplashKit.QuitRequested())
+            {
+                SplashKit.ProcessEvents();
+
+                // Check whether the current window has focus
+                bool hasFocus = SplashKit.WindowHasFocus(SplashKit.CurrentWindow());
+
+                SplashKit.ClearScreen(Color.White);
+
+                // Show the current focus state on screen
+                SplashKit.DrawText("Click on or away from the window to change focus.", Color.Black, 120, 220);
+
+                if (hasFocus)
+                {
+                    SplashKit.DrawText("Window has focus", Color.Green, 280, 280);
+                }
+                else
+                {
+                    SplashKit.DrawText("Window does not have focus", Color.Red, 240, 280);
+                }
+
+                SplashKit.RefreshScreen(60);
+            }
+
+            SplashKit.CloseAllWindows();
+        }
+    }
+}

public/usage-examples/windows/window_has_focus-1-example-top-level.cs

@@ -0,0 +1,30 @@
+using SplashKitSDK;
+using static SplashKitSDK.SplashKit;
+
+OpenWindow("Window Has Focus", 800, 600);
+
+while (!QuitRequested())
+{
+    ProcessEvents();
+
+    // Check whether the current window has focus
+    bool hasFocus = WindowHasFocus(CurrentWindow());
+
+    ClearScreen(ColorWhite());
+
+    // Show the current focus state on screen
+    DrawText("Click on or away from the window to change focus.", ColorBlack(), 120, 220);
+
+    if (hasFocus)
+    {
+        DrawText("Window has focus", ColorGreen(), 280, 280);
+    }
+    else
+    {
+        DrawText("Window does not have focus", ColorRed(), 240, 280);
+    }
+
+    RefreshScreen(60);
+}
+
+CloseAllWindows();

public/usage-examples/windows/window_has_focus-1-example.cpp

@@ -0,0 +1,33 @@
+#include "splashkit.h"
+
+int main()
+{
+    open_window("Window Has Focus", 800, 600);
+
+    while (!quit_requested())
+    {
+        process_events();
+
+        // Check whether the current window has focus
+        bool has_focus = window_has_focus(current_window());
+
+        clear_screen(COLOR_WHITE);
+
+        // Show the current focus state on screen
+        draw_text("Click on or away from the window to change focus.", COLOR_BLACK, 120, 220);
+
+        if (has_focus)
+        {
+            draw_text("Window has focus", COLOR_GREEN, 280, 280);
+        }
+        else
+        {
+            draw_text("Window does not have focus", COLOR_RED, 240, 280);
+        }
+
+        refresh_screen(60);
+    }
+
+    close_all_windows();
+    return 0;
+}

public/usage-examples/windows/window_has_focus-1-example.py

@@ -0,0 +1,23 @@
+from splashkit import *
+
+open_window("Window Has Focus", 800, 600)
+
+while not quit_requested():
+    process_events()
+
+    # Check whether the current window has focus
+    has_focus = window_has_focus(current_window())
+
+    clear_screen(color_white())
+
+    # Show the current focus state on screen
+    draw_text_no_font_no_size("Click on or away from the window to change focus.", color_black(), 120, 220)
+
+    if has_focus:
+        draw_text_no_font_no_size("Window has focus", color_green(), 280, 280)
+    else:
+        draw_text_no_font_no_size("Window does not have focus", color_red(), 240, 280)
+
+    refresh_screen_with_target_fps(60)
+
+close_all_windows()

public/usage-examples/windows/window_has_focus-1-example.txt

@@ -0,0 +1 @@
+Show Whether the Window Has Focus