diff options
Diffstat (limited to 'deps/raylib/examples/text/text_rectangle_bounds.c')
| -rw-r--r-- | deps/raylib/examples/text/text_rectangle_bounds.c | 268 |
1 files changed, 268 insertions, 0 deletions
diff --git a/deps/raylib/examples/text/text_rectangle_bounds.c b/deps/raylib/examples/text/text_rectangle_bounds.c new file mode 100644 index 0000000..173d3f9 --- /dev/null +++ b/deps/raylib/examples/text/text_rectangle_bounds.c @@ -0,0 +1,268 @@ +/******************************************************************************************* +* +* 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 + } +} |