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authorbonmas14 <bonmas14@gmail.com>2025-09-20 22:28:15 +0300
committerbonmas14 <bonmas14@gmail.com>2025-09-20 22:28:15 +0300
commitcdda4c4182c9ee068567529715e4a5c68a8efb58 (patch)
tree38a63f62a64018a2d35fc33354f8589fd33b7514 /deps/raylib/examples/text/text_rectangle_bounds.c
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+/*******************************************************************************************
+*
+* raylib [text] example - Rectangle bounds
+*
+* Example originally created with raylib 2.5, last time updated with raylib 4.0
+*
+* Example contributed by Vlad Adrian (@demizdor) and reviewed by Ramon Santamaria (@raysan5)
+*
+* Example licensed under an unmodified zlib/libpng license, which is an OSI-certified,
+* BSD-like license that allows static linking with closed source software
+*
+* Copyright (c) 2018-2024 Vlad Adrian (@demizdor) and Ramon Santamaria (@raysan5)
+*
+********************************************************************************************/
+
+#include "raylib.h"
+
+static void DrawTextBoxed(Font font, const char *text, Rectangle rec, float fontSize, float spacing, bool wordWrap, Color tint); // Draw text using font inside rectangle limits
+static void DrawTextBoxedSelectable(Font font, const char *text, Rectangle rec, float fontSize, float spacing, bool wordWrap, Color tint, int selectStart, int selectLength, Color selectTint, Color selectBackTint); // Draw text using font inside rectangle limits with support for text selection
+
+//------------------------------------------------------------------------------------
+// Program main entry point
+//------------------------------------------------------------------------------------
+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 = { 25.0f, 25.0f, screenWidth - 50.0f, screenHeight - 250.0f };
+ Rectangle resizer = { container.x + container.width - 17, container.y + container.height - 17, 14, 14 };
+
+ // Minimum width and heigh for the container rectangle
+ const float minWidth = 60;
+ const float minHeight = 60;
+ const float maxWidth = screenWidth - 50.0f;
+ const float maxHeight = screenHeight - 160.0f;
+
+ 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_BUTTON_LEFT)) resizing = false;
+
+ float width = container.width + (mouse.x - lastMouse.x);
+ container.width = (width > minWidth)? ((width < maxWidth)? width : maxWidth) : minWidth;
+
+ float 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_BUTTON_LEFT) && 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)
+ DrawTextBoxed(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 bottom info
+ DrawRectangle(0, screenHeight - 54, screenWidth, 54, GRAY);
+ DrawRectangleRec((Rectangle){ 382.0f, screenHeight - 34.0f, 12.0f, 12.0f }, MAROON);
+
+ 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 - 86, 20, GRAY);
+
+ DrawText("Click hold & drag the to resize the container", 155, screenHeight - 38, 20, RAYWHITE);
+
+ EndDrawing();
+ //----------------------------------------------------------------------------------
+ }
+
+ // De-Initialization
+ //--------------------------------------------------------------------------------------
+ CloseWindow(); // Close window and OpenGL context
+ //--------------------------------------------------------------------------------------
+
+ return 0;
+}
+
+//--------------------------------------------------------------------------------------
+// Module functions definition
+//--------------------------------------------------------------------------------------
+
+// Draw text using font inside rectangle limits
+static void DrawTextBoxed(Font font, const char *text, Rectangle rec, float fontSize, float spacing, bool wordWrap, Color tint)
+{
+ DrawTextBoxedSelectable(font, text, rec, fontSize, spacing, wordWrap, tint, 0, 0, WHITE, WHITE);
+}
+
+// Draw text using font inside rectangle limits with support for text selection
+static void DrawTextBoxedSelectable(Font font, const char *text, Rectangle rec, float fontSize, float spacing, bool wordWrap, Color tint, int selectStart, int selectLength, Color selectTint, Color selectBackTint)
+{
+ int length = TextLength(text); // Total length in bytes of the text, scanned by codepoints in loop
+
+ float textOffsetY = 0; // Offset between lines (on line break '\n')
+ float textOffsetX = 0.0f; // Offset X to next character to draw
+
+ float scaleFactor = fontSize/(float)font.baseSize; // Character rectangle scaling factor
+
+ // Word/character wrapping mechanism variables
+ enum { MEASURE_STATE = 0, DRAW_STATE = 1 };
+ int state = wordWrap? MEASURE_STATE : DRAW_STATE;
+
+ int startLine = -1; // Index where to begin drawing (where a line begins)
+ int endLine = -1; // Index where to stop drawing (where a line ends)
+ int lastk = -1; // Holds last value of the character position
+
+ for (int i = 0, k = 0; i < length; i++, k++)
+ {
+ // Get next codepoint from byte string and glyph index in font
+ int codepointByteCount = 0;
+ int codepoint = GetCodepoint(&text[i], &codepointByteCount);
+ int index = GetGlyphIndex(font, codepoint);
+
+ // NOTE: Normally we exit the decoding sequence as soon as a bad byte is found (and return 0x3f)
+ // but we need to draw all of the bad bytes using the '?' symbol moving one byte
+ if (codepoint == 0x3f) codepointByteCount = 1;
+ i += (codepointByteCount - 1);
+
+ float glyphWidth = 0;
+ if (codepoint != '\n')
+ {
+ glyphWidth = (font.glyphs[index].advanceX == 0) ? font.recs[index].width*scaleFactor : font.glyphs[index].advanceX*scaleFactor;
+
+ if (i + 1 < length) glyphWidth = glyphWidth + spacing;
+ }
+
+ // NOTE: When wordWrap is ON we first measure how much of the text we can draw before going outside of the rec container
+ // We store this info in startLine and endLine, then we change states, draw the text between those two variables
+ // and change states again and again recursively until the end of the text (or until we get outside of the container).
+ // When wordWrap is OFF we don't need the measure state so we go to the drawing state immediately
+ // and begin drawing on the next line before we can get outside the container.
+ if (state == MEASURE_STATE)
+ {
+ // TODO: There are multiple types of spaces in UNICODE, maybe it's a good idea to add support for more
+ // Ref: http://jkorpela.fi/chars/spaces.html
+ if ((codepoint == ' ') || (codepoint == '\t') || (codepoint == '\n')) endLine = i;
+
+ if ((textOffsetX + glyphWidth) > rec.width)
+ {
+ endLine = (endLine < 1)? i : endLine;
+ if (i == endLine) endLine -= codepointByteCount;
+ if ((startLine + codepointByteCount) == endLine) endLine = (i - codepointByteCount);
+
+ state = !state;
+ }
+ else if ((i + 1) == length)
+ {
+ endLine = i;
+ state = !state;
+ }
+ else if (codepoint == '\n') state = !state;
+
+ if (state == DRAW_STATE)
+ {
+ textOffsetX = 0;
+ i = startLine;
+ glyphWidth = 0;
+
+ // Save character position when we switch states
+ int tmp = lastk;
+ lastk = k - 1;
+ k = tmp;
+ }
+ }
+ else
+ {
+ if (codepoint == '\n')
+ {
+ if (!wordWrap)
+ {
+ textOffsetY += (font.baseSize + font.baseSize/2)*scaleFactor;
+ textOffsetX = 0;
+ }
+ }
+ else
+ {
+ if (!wordWrap && ((textOffsetX + glyphWidth) > rec.width))
+ {
+ textOffsetY += (font.baseSize + font.baseSize/2)*scaleFactor;
+ textOffsetX = 0;
+ }
+
+ // When text overflows rectangle height limit, just stop drawing
+ if ((textOffsetY + font.baseSize*scaleFactor) > rec.height) break;
+
+ // Draw selection background
+ bool isGlyphSelected = false;
+ if ((selectStart >= 0) && (k >= selectStart) && (k < (selectStart + selectLength)))
+ {
+ DrawRectangleRec((Rectangle){ rec.x + textOffsetX - 1, rec.y + textOffsetY, glyphWidth, (float)font.baseSize*scaleFactor }, selectBackTint);
+ isGlyphSelected = true;
+ }
+
+ // Draw current character glyph
+ if ((codepoint != ' ') && (codepoint != '\t'))
+ {
+ DrawTextCodepoint(font, codepoint, (Vector2){ rec.x + textOffsetX, rec.y + textOffsetY }, fontSize, isGlyphSelected? selectTint : tint);
+ }
+ }
+
+ if (wordWrap && (i == endLine))
+ {
+ textOffsetY += (font.baseSize + font.baseSize/2)*scaleFactor;
+ textOffsetX = 0;
+ startLine = endLine;
+ endLine = -1;
+ glyphWidth = 0;
+ selectStart += lastk - k;
+ k = lastk;
+
+ state = !state;
+ }
+ }
+
+ if ((textOffsetX != 0) || (codepoint != ' ')) textOffsetX += glyphWidth; // avoid leading spaces
+ }
+}