raylib-src/examples/text/text_rectangle_bounds.c

/*******************************************************************************************
*
*   raylib [text] example - Draw text inside a rectangle
*
*   This example has been created using raylib 2.3 (www.raylib.com)
*   raylib is licensed under an unmodified zlib/libpng license (View raylib.h for details)
*
*   Example contributed by Vlad Adrian (@demizdor) and reviewed by Ramon Santamaria (@raysan5)
*
*   Copyright (c) 2018 Vlad Adrian (@demizdor) and Ramon Santamaria (@raysan5)
*
********************************************************************************************/

#include "raylib.h"

int main(void)
{
    // Initialization
    //--------------------------------------------------------------------------------------
    const int screenWidth = 800;
    const int screenHeight = 450;

    InitWindow(screenWidth, screenHeight, "raylib [text] example - draw text inside a rectangle");

    const char text[] = "Text cannot escape\tthis container\t...word wrap also works when active so here's\
    a long text for testing.\n\nLorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod\
    tempor incididunt ut labore et dolore magna aliqua. Nec ullamcorper sit amet risus nullam eget felis eget.";

    bool resizing = false;
    bool wordWrap = true;

    Rectangle container = { 25, 25, screenWidth - 50, screenHeight - 250};
    Rectangle resizer = { container.x + container.width - 17, container.y + container.height - 17, 14, 14 };

    // Minimum width and heigh for the container rectangle
    const int minWidth = 60;
    const int minHeight = 60;
    const int maxWidth = screenWidth - 50;
    const int maxHeight = screenHeight - 160;

    Vector2 lastMouse = { 0.0f, 0.0f }; // Stores last mouse coordinates
    Color borderColor = MAROON;         // Container border color
    Font font = GetFontDefault();       // Get default system font

    SetTargetFPS(60);                   // Set our game to run at 60 frames-per-second
    //--------------------------------------------------------------------------------------

    // Main game loop
    while (!WindowShouldClose())        // Detect window close button or ESC key
    {
        // Update
        //----------------------------------------------------------------------------------
        if (IsKeyPressed(KEY_SPACE)) wordWrap = !wordWrap;

        Vector2 mouse = GetMousePosition();

        // Check if the mouse is inside the container and toggle border color
        if (CheckCollisionPointRec(mouse, container)) borderColor = Fade(MAROON, 0.4f);
        else if (!resizing) borderColor = MAROON;

        // Container resizing logic
        if (resizing)
        {
            if (IsMouseButtonReleased(MOUSE_LEFT_BUTTON)) resizing = false;

            int width = container.width + (mouse.x - lastMouse.x);
            container.width = (width > minWidth)? ((width < maxWidth)? width : maxWidth) : minWidth;

            int height = container.height + (mouse.y - lastMouse.y);
            container.height = (height > minHeight)? ((height < maxHeight)? height : maxHeight) : minHeight;
        }
        else
        {
            // Check if we're resizing
            if (IsMouseButtonDown(MOUSE_LEFT_BUTTON) && CheckCollisionPointRec(mouse, resizer)) resizing = true;
        }

        // Move resizer rectangle properly
        resizer.x = container.x + container.width - 17;
        resizer.y = container.y + container.height - 17;

        lastMouse = mouse; // Update mouse
        //----------------------------------------------------------------------------------

        // Draw
        //----------------------------------------------------------------------------------
        BeginDrawing();

            ClearBackground(RAYWHITE);

            DrawRectangleLinesEx(container, 3, borderColor); // Draw container border

            // Draw text in container (add some padding)
            DrawTextRec(font, text,
                       (Rectangle){ container.x + 4, container.y + 4, container.width - 4, container.height - 4 },
                       20.0f, 2.0f, wordWrap, GRAY);

            DrawRectangleRec(resizer, borderColor);         // Draw the resize box

            // Draw info
            DrawText("Word Wrap: ", 313, screenHeight-115, 20, BLACK);
            if (wordWrap) DrawText("ON", 447, screenHeight - 115, 20, RED);
            else DrawText("OFF", 447, screenHeight - 115, 20, BLACK);
            DrawText("Press [SPACE] to toggle word wrap", 218, screenHeight - 91, 20, GRAY);

            DrawRectangle(0, screenHeight - 54, screenWidth, 54, GRAY);
            DrawText("Click hold & drag the    to resize the container", 155, screenHeight - 38, 20, RAYWHITE);
            DrawRectangleRec((Rectangle){ 382, screenHeight - 34, 12, 12 }, MAROON);

        EndDrawing();
        //----------------------------------------------------------------------------------
    }

    // De-Initialization
    //--------------------------------------------------------------------------------------
    CloseWindow();        // Close window and OpenGL context
    //--------------------------------------------------------------------------------------

    return 0;
}