new example: text_input_box

examples/text/text_input_box.c

@@ -0,0 +1,116 @@
+/*******************************************************************************************
+*
+*   raylib [text] example - Input Box
+*
+*   This example has been created using raylib 1.7 (www.raylib.com)
+*   raylib is licensed under an unmodified zlib/libpng license (View raylib.h for details)
+*
+*   Copyright (c) 2017 Ramon Santamaria (@raysan5)
+*
+********************************************************************************************/
+
+#include "raylib.h"
+
+#define MAX_INPUT_CHARS     9
+
+int main()
+{
+    // Initialization
+    //--------------------------------------------------------------------------------------
+    int screenWidth = 800;
+    int screenHeight = 450;
+
+    InitWindow(screenWidth, screenHeight, "raylib [text] example - input box");
+
+    char name[MAX_INPUT_CHARS + 1] = "\0";      // NOTE: One extra space required for line ending char '\0'
+    int letterCount = 0;
+
+    Rectangle textBox = { screenWidth/2 - 100, 180, 225, 50 };
+    bool mouseOnText = false;
+
+    int framesCounter = 0;
+
+    SetTargetFPS(60);
+    //--------------------------------------------------------------------------------------
+
+    // Main game loop
+    while (!WindowShouldClose())    // Detect window close button or ESC key
+    {
+        // Update
+        //----------------------------------------------------------------------------------
+        if (CheckCollisionPointRec(GetMousePosition(), textBox)) mouseOnText = true;
+        else mouseOnText = false;
+        
+        if (mouseOnText)
+        {
+            int key = GetKeyPressed();
+            
+            // NOTE: Only allow keys in range [32..125]
+            if ((key >= 32) && (key <= 125) && (letterCount < MAX_INPUT_CHARS))
+            {
+                name[letterCount] = (char)key;
+                letterCount++;
+            }
+            
+            if (key == KEY_BACKSPACE)
+            {
+                letterCount--;
+                name[letterCount] = '\0';
+                
+                if (letterCount < 0) letterCount = 0;
+            }
+        }
+        
+        if (mouseOnText) framesCounter++;
+        else framesCounter = 0;
+        //----------------------------------------------------------------------------------
+
+        // Draw
+        //----------------------------------------------------------------------------------
+        BeginDrawing();
+
+            ClearBackground(RAYWHITE);
+            
+            DrawText("PLACE MOUSE OVER INPUT BOX!", 240, 140, 20, GRAY);
+
+            DrawRectangleRec(textBox, LIGHTGRAY);
+            if (mouseOnText) DrawRectangleLines(textBox.x, textBox.y, textBox.width, textBox.height, RED);
+            else DrawRectangleLines(textBox.x, textBox.y, textBox.width, textBox.height, DARKGRAY);
+            
+            DrawText(name, textBox.x + 5, textBox.y + 8, 40, MAROON);
+            
+            DrawText(FormatText("INPUT CHARS: %i/%i", letterCount, MAX_INPUT_CHARS), 315, 250, 20, DARKGRAY);
+
+            if (mouseOnText)
+            {
+                if (letterCount < MAX_INPUT_CHARS)
+                {
+                    // Draw blinking underscore char
+                    if (((framesCounter/20)%2) == 0) DrawText("_", textBox.x + 8 + MeasureText(name, 40), textBox.y + 12, 40, MAROON);
+                }
+                else DrawText("Press BACKSPACE to delete chars...", 230, 300, 20, GRAY);
+            }
+            
+        EndDrawing();
+        //----------------------------------------------------------------------------------
+    }
+
+    // De-Initialization
+    //--------------------------------------------------------------------------------------   
+    CloseWindow();        // Close window and OpenGL context
+    //--------------------------------------------------------------------------------------
+
+    return 0;
+}
+
+// Check if any key is pressed
+// NOTE: We limit keys check to keys between 32 (KEY_SPACE) and 126
+bool IsAnyKeyPressed()
+{
+    bool keyPressed = false;
+    int key = GetKeyPressed();
+
+    if ((key >= 32) && (key <= 126)) keyPressed = true;
+
+    return keyPressed;
+}