step

raygui/raygui.go

@@ -1,40 +1,79 @@
+// Package raygui - Simple and easy-to-use IMGUI (immediate mode GUI API) library
+
 package raygui
 
-/*
-#cgo CFLAGS: -DRAYGUI_IMPLEMENTATION
-#include "../raylib/raygui.h"
-#include <stdlib.h>
-*/
-import "C"
-
 import (
-	"unsafe"
-	rl  "github.com/Konstantin8105/raylib-go/raylib"
+	rl "github.com/gen2brain/raylib-go/raylib"
 )
 
-// int GuiToggleGroup(Rectangle bounds, const char *text, int active)
-func ToggleGroup(bounds rl.Rectangle, text string, active int) int {
-	var cbounds C.struct_Rectangle
-	cbounds.x = C.float(bounds.X)
-	cbounds.y = C.float(bounds.Y)
-	cbounds.width = C.float(bounds.Width)
-	cbounds.height = C.float(bounds.Height)
-	ctext := C.CString(text)
-	defer C.free(unsafe.Pointer(ctext))
-	cactive := C.int(active)
-	res := C.GuiToggleGroup(cbounds, ctext, cactive)
-	return int(res)
+// GUI controls states
+type ControlState int
+
+const (
+	Disabled ControlState = iota
+	// Normal is the default state for rendering GUI elements.
+	Normal
+	// Focused indicates the mouse is hovering over the GUI element.
+	Focused
+	// Pressed indicates the mouse is hovering over the GUI element and LMB is pressed down.
+	Pressed
+	// Clicked indicates the mouse is hovering over the GUI element and LMB has just been released.
+	Clicked
+)
+
+// IsColliding will return true if 'point' is within any of the given rectangles.
+func IsInAny(point rl.Vector2, rectangles ...rl.Rectangle) bool {
+	for _, rect := range rectangles {
+		if rl.CheckCollisionPointRec(point, rect) {
+			return true
+		}
+	}
+	return false
 }
 
-// bool GuiButton(Rectangle bounds, const char *text)
-func Button(bounds rl.Rectangle, text string) bool {
-	var cbounds C.struct_Rectangle
-	cbounds.x = C.float(bounds.X)
-	cbounds.y = C.float(bounds.Y)
-	cbounds.width = C.float(bounds.Width)
-	cbounds.height = C.float(bounds.Height)
-	ctext := C.CString(text)
-	defer C.free(unsafe.Pointer(ctext))
-	res := C.GuiButton(cbounds, ctext)
-	return bool(res)
+// GetInteractionState determines the current state of a control based on mouse position and
+// button states.
+func GetInteractionState(rectangles ...rl.Rectangle) ControlState {
+	switch {
+	case !IsInAny(rl.GetMousePosition(), rectangles...):
+		return Normal
+	case rl.IsMouseButtonDown(rl.MouseLeftButton):
+		return Pressed
+	case rl.IsMouseButtonReleased(rl.MouseLeftButton) || rl.IsMouseButtonPressed(rl.MouseLeftButton):
+		return Clicked
+	default:
+		return Focused
+	}
+}
+
+// Constrain rectangle will ensure that if width/height are below given minimums, they will
+// be set to an ideal minimum.
+func ConstrainRectangle(bounds *rl.Rectangle, minWidth, idealWidth, minHeight, idealHeight int32) {
+	if int32(bounds.Width) < minWidth {
+		bounds.Width = float32(idealWidth)
+	}
+	if int32(bounds.Height) < minHeight {
+		bounds.Height = float32(idealHeight)
+	}
+}
+
+// InsetRectangle returns the dimensions of a rectangle inset by a margin within an outer rectangle.
+func InsetRectangle(outer rl.RectangleInt32, inset int32) rl.RectangleInt32 {
+	return rl.RectangleInt32{
+		X: outer.X + inset, Y: outer.Y + inset,
+		Width: outer.Width - 2*inset, Height: outer.Height - 2*inset,
+	}
+}
+
+// DrawInsetRectangle is a helper to draw a box inset by a margin of an outer container.
+func DrawInsetRectangle(outer rl.RectangleInt32, inset int32, color rl.Color) {
+	inside := InsetRectangle(outer, inset)
+	rl.DrawRectangle(inside.X, inside.Y, inside.Width, inside.Height, color)
+}
+
+// DrawBorderedRectangle is a helper to draw a box with a border around it.
+func DrawBorderedRectangle(bounds rl.RectangleInt32, borderWidth int32, borderColor, insideColor rl.Color) {
+	inside := InsetRectangle(bounds, borderWidth)
+	rl.DrawRectangle(bounds.X, bounds.Y, bounds.Width, bounds.Height, borderColor)
+	rl.DrawRectangle(inside.X, inside.Y, inside.Width, inside.Height, insideColor)
 }