mirror of
https://github.com/raysan5/raylib.git
synced 2025-10-20 16:51:44 +00:00
228 lines
9.3 KiB
C
228 lines
9.3 KiB
C
/*******************************************************************************************
|
|
*
|
|
* raylib [shapes] example - pie chart
|
|
*
|
|
* Example complexity rating: [★★★☆] 3/4
|
|
*
|
|
* Example originally created with raylib 5.5, last time updated with raylib 5.6
|
|
*
|
|
* Example contributed by Gideon Serfontein (@GideonSerf) 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) 2025 Gideon Serfontein (@GideonSerf)
|
|
*
|
|
********************************************************************************************/
|
|
|
|
#include "raylib.h"
|
|
#include <math.h>
|
|
#include <stdio.h>
|
|
|
|
#define RAYGUI_IMPLEMENTATION
|
|
#include "raygui.h"
|
|
|
|
#define MAX_PIE_SLICES 10 // Max pie slices
|
|
|
|
//------------------------------------------------------------------------------------
|
|
// Program main entry point
|
|
//------------------------------------------------------------------------------------
|
|
int main(void)
|
|
{
|
|
// Initialization
|
|
//--------------------------------------------------------------------------------------
|
|
const int screenWidth = 800;
|
|
const int screenHeight = 450;
|
|
|
|
InitWindow(screenWidth, screenHeight, "raylib [shapes] example - pie chart");
|
|
|
|
int sliceCount = 7;
|
|
float donutInnerRadius = 25.0f;
|
|
float values[MAX_PIE_SLICES] = { 300.0f, 100.0f, 450.0f, 350.0f, 600.0f, 380.0f, 750.0f }; // Initial slice values
|
|
char labels[MAX_PIE_SLICES][32] = { 0 };
|
|
bool editingLabel[MAX_PIE_SLICES] = { 0 };
|
|
|
|
for (int i = 0; i < MAX_PIE_SLICES; i++)
|
|
snprintf(labels[i], 32, "Slice %02i", i + 1);
|
|
|
|
bool showValues = true;
|
|
bool showPercentages = false;
|
|
bool showDonut = false;
|
|
int hoveredSlice = -1;
|
|
Rectangle scrollPanelBounds = {0};
|
|
Vector2 scrollContentOffset = {0};
|
|
Rectangle view = { 0 };
|
|
|
|
// UI layout parameters
|
|
const int panelWidth = 270;
|
|
const int panelMargin = 5;
|
|
|
|
// UI Panel top-left anchor
|
|
const Vector2 panelPos = {
|
|
(float)screenWidth - panelMargin - panelWidth,
|
|
(float)panelMargin
|
|
};
|
|
|
|
// UI Panel rectangle
|
|
const Rectangle panelRect = {
|
|
panelPos.x, panelPos.y,
|
|
(float)panelWidth,
|
|
(float)screenHeight - 2.0f*panelMargin
|
|
};
|
|
|
|
// Pie chart geometry
|
|
const Rectangle canvas = { 0, 0, panelPos.x, (float)screenHeight };
|
|
const Vector2 center = { canvas.width/2.0f, canvas.height/2.0f};
|
|
const float radius = 205.0f;
|
|
|
|
// Total value for percentage calculations
|
|
float totalValue = 0.0f;
|
|
|
|
SetTargetFPS(60);
|
|
//--------------------------------------------------------------------------------------
|
|
|
|
// Main game loop
|
|
while (!WindowShouldClose())
|
|
{
|
|
// Update
|
|
//----------------------------------------------------------------------------------
|
|
// Calculate total value for percentage calculations
|
|
totalValue = 0.0f;
|
|
for (int i = 0; i < sliceCount; i++) totalValue += values[i];
|
|
|
|
// Check for mouse hover over slices
|
|
hoveredSlice = -1; // Reset hovered slice
|
|
Vector2 mousePos = GetMousePosition();
|
|
if (CheckCollisionPointRec(mousePos, canvas)) // Only check if mouse is inside the canvas
|
|
{
|
|
float dx = mousePos.x - center.x;
|
|
float dy = mousePos.y - center.y;
|
|
float distance = sqrtf(dx*dx + dy*dy);
|
|
|
|
if (distance <= radius) // Inside the pie radius
|
|
{
|
|
float angle = atan2f(dy, dx)*RAD2DEG;
|
|
if (angle < 0) angle += 360;
|
|
|
|
float currentAngle = 0.0f;
|
|
for (int i = 0; i < sliceCount; i++)
|
|
{
|
|
float sweep = (totalValue > 0)? (values[i]/totalValue)*360.0f : 0.0f;
|
|
|
|
if ((angle >= currentAngle) && (angle < (currentAngle + sweep)))
|
|
{
|
|
hoveredSlice = i;
|
|
break;
|
|
}
|
|
|
|
currentAngle += sweep;
|
|
}
|
|
}
|
|
}
|
|
//----------------------------------------------------------------------------------
|
|
|
|
// Draw
|
|
//----------------------------------------------------------------------------------
|
|
BeginDrawing();
|
|
ClearBackground(RAYWHITE);
|
|
|
|
// Draw the pie chart on the canvas
|
|
float startAngle = 0.0f;
|
|
for (int i = 0; i < sliceCount; i++)
|
|
{
|
|
float sweepAngle = (totalValue > 0)? (values[i]/totalValue)*360.0f : 0.0f;
|
|
float midAngle = startAngle + sweepAngle/2.0f; // Middle angle for label positioning
|
|
|
|
Color color = ColorFromHSV((float)i/sliceCount*360.0f, 0.75f, 0.9f);
|
|
float currentRadius = radius;
|
|
|
|
// Make the hovered slice pop out by adding 5 pixels to its radius
|
|
if (i == hoveredSlice) currentRadius += 20.0f;
|
|
|
|
// Draw the pie slice using raylib's DrawCircleSector function
|
|
DrawCircleSector(center, currentRadius, startAngle, startAngle + sweepAngle, 120, color);
|
|
|
|
// Draw the label for the current slice
|
|
if (values[i] > 0)
|
|
{
|
|
char labelText[64] = { 0 };
|
|
if (showValues && showPercentages) snprintf(labelText, 64, "%.1f (%.0f%%)", values[i], (values[i]/totalValue)*100.0f);
|
|
else if (showValues) snprintf(labelText, 64, "%.1f", values[i]);
|
|
else if (showPercentages) snprintf(labelText, 64, "%.0f%%", (values[i]/totalValue)*100.0f);
|
|
else labelText[0] = '\0';
|
|
|
|
Vector2 textSize = MeasureTextEx(GetFontDefault(), labelText, 20, 1);
|
|
float labelRadius = radius*0.7f;
|
|
Vector2 labelPos = { center.x + cosf(midAngle*DEG2RAD)*labelRadius - textSize.x/2.0f,
|
|
center.y + sinf(midAngle*DEG2RAD)*labelRadius - textSize.y/2.0f };
|
|
DrawText(labelText, (int)labelPos.x, (int)labelPos.y, 20, WHITE);
|
|
}
|
|
|
|
// Draw inner circle to create donut effect
|
|
// TODO: This is a hacky solution, better use DrawRing()
|
|
if (showDonut) DrawCircle(center.x, center.y, donutInnerRadius, RAYWHITE);
|
|
|
|
startAngle += sweepAngle;
|
|
}
|
|
|
|
// UI control panel
|
|
DrawRectangleRec(panelRect, Fade(LIGHTGRAY, 0.5f));
|
|
DrawRectangleLinesEx(panelRect, 1.0f, GRAY);
|
|
|
|
GuiSpinner((Rectangle){ panelPos.x + 95, (float)panelPos.y + 12, 125, 25 }, "Slices ", &sliceCount, 1, MAX_PIE_SLICES, false);
|
|
GuiCheckBox((Rectangle){ panelPos.x + 20, (float)panelPos.y + 12 + 40, 20, 20 }, "Show Values", &showValues);
|
|
GuiCheckBox((Rectangle){ panelPos.x + 20, (float)panelPos.y + 12 + 70, 20, 20 }, "Show Percentages", &showPercentages);
|
|
GuiCheckBox((Rectangle){ panelPos.x + 20, (float)panelPos.y + 12 + 100, 20, 20 }, "Make Donut", &showDonut);
|
|
|
|
if (showDonut) GuiDisable();
|
|
GuiSliderBar((Rectangle){ panelPos.x + 80, (float)panelPos.y + 12 + 130, panelRect.width - 100, 30 },
|
|
"Inner Radius", NULL, &donutInnerRadius, 5.0f, radius - 10.0f);
|
|
GuiEnable();
|
|
|
|
GuiLine((Rectangle){ panelPos.x + 10, (float)panelPos.y + 12 + 170, panelRect.width - 20, 1 }, NULL);
|
|
|
|
// Scrollable area for slice editors
|
|
scrollPanelBounds = (Rectangle){
|
|
panelPos.x + panelMargin,
|
|
(float)panelPos.y + 12 + 190,
|
|
panelRect.width - panelMargin*2,
|
|
panelRect.y + panelRect.height - panelPos.y + 12 + 190 - panelMargin
|
|
};
|
|
int contentHeight = sliceCount*35;
|
|
|
|
GuiScrollPanel(scrollPanelBounds, NULL,
|
|
(Rectangle){ 0, 0, panelRect.width - 25, (float)contentHeight },
|
|
&scrollContentOffset, &view);
|
|
|
|
const float contentX = view.x + scrollContentOffset.x; // Left of content
|
|
const float contentY = view.y + scrollContentOffset.y; // Top of content
|
|
|
|
BeginScissorMode((int)view.x, (int)view.y, (int)view.width, (int)view.height);
|
|
|
|
for (int i = 0; i < sliceCount; i++)
|
|
{
|
|
const int rowY = (int)(contentY + 5 + i*35);
|
|
|
|
// Color indicator
|
|
Color color = ColorFromHSV((float)i/sliceCount*360.0f, 0.75f, 0.9f);
|
|
DrawRectangle((int)(contentX + 15), rowY + 5, 20, 20, color);
|
|
|
|
// Label textbox
|
|
if (GuiTextBox((Rectangle){ contentX + 45, (float)rowY, 75, 30 }, labels[i], 32, editingLabel[i])) editingLabel[i] = !editingLabel[i];
|
|
|
|
GuiSliderBar((Rectangle){ contentX + 130, (float)rowY, 110, 30 }, NULL, NULL, &values[i], 0.0f, 1000.0f);
|
|
}
|
|
|
|
EndScissorMode();
|
|
|
|
EndDrawing();
|
|
//----------------------------------------------------------------------------------
|
|
}
|
|
|
|
// De-Initialization
|
|
//--------------------------------------------------------------------------------------
|
|
CloseWindow(); // Close window and OpenGL context
|
|
//--------------------------------------------------------------------------------------
|
|
|
|
return 0;
|
|
} |