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