269 lines
12 KiB
C
269 lines
12 KiB
C
/*******************************************************************************************
|
|
*
|
|
* 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) 2018-2023 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
|
|
}
|
|
}
|