magnolia/samples/gui-borderless.oak at main · SpcFORK/magnolia · GitHub

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// gui-borderless.oak
// Demonstrates a borderless (top-barless) window with custom title bar.
//
// Features:
//  - No OS title bar or window chrome (WS_POPUP style)
//  - Custom-drawn title bar with close button
//  - Client-area window dragging via beginDrag/updateDrag/endDrag
//
// Run: magnolia run samples/gui-borderless.oak

{
	println: println
	string: string
	int: int
	float: float
} := import('std')

gui := import('GUI')

// ─── Colours ───────────────────────────────────────────────────────────────

C_BG := gui.rgb(22, 24, 30)
C_TITLEBAR := gui.rgb(30, 32, 42)
C_TITLEBAR_TEXT := gui.rgb(200, 210, 230)
C_CLOSE_HOVER := gui.rgb(200, 50, 50)
C_CLOSE_NORMAL := gui.rgb(120, 130, 150)
C_BORDER := gui.rgb(60, 70, 90)
C_CONTENT := gui.rgb(180, 190, 210)
C_ACCENT := gui.rgb(80, 140, 255)

// ─── Layout constants ──────────────────────────────────────────────────────

WIN_W := 640
WIN_H := 420
TITLEBAR_H := 32
CLOSE_SIZE := 16
CLOSE_PAD := 8

// ─── State ─────────────────────────────────────────────────────────────────

state := {
	hoverClose: false
	dragging: false
}

// ─── Helpers ───────────────────────────────────────────────────────────────

fn inRect?(mx, my, x, y, w, h) mx >= x & mx < x + w & my >= y & my < y + h

fn closeButtonX() WIN_W - CLOSE_SIZE - CLOSE_PAD
fn closeButtonY() (TITLEBAR_H - CLOSE_SIZE) / 2

// ─── Drawing ───────────────────────────────────────────────────────────────

fn drawFrame(window) {
	gui.beginFrame(window)

	// Background
	gui.draw(window, { shape: :rect, x: 0, y: 0, width: WIN_W, height: WIN_H, color: C_BG })

	// Border (1px all around)
	gui.draw(window, { shape: :line, x1: 0, y1: 0, x2: WIN_W - 1, y2: 0, color: C_BORDER })
	gui.draw(window, { shape: :line, x1: 0, y1: WIN_H - 1, x2: WIN_W - 1, y2: WIN_H - 1, color: C_BORDER })
	gui.draw(window, { shape: :line, x1: 0, y1: 0, x2: 0, y2: WIN_H - 1, color: C_BORDER })
	gui.draw(window, { shape: :line, x1: WIN_W - 1, y1: 0, x2: WIN_W - 1, y2: WIN_H - 1, color: C_BORDER })

	// Title bar background
	gui.draw(window, { shape: :rect, x: 1, y: 1, width: WIN_W - 2, height: TITLEBAR_H - 1, color: C_TITLEBAR })

	// Title text
	gui.draw(window, { shape: :text, x: 12, y: 9, text: 'Borderless Window' })

	// Close button
	cbx := closeButtonX()
	cby := closeButtonY()
	closeColor := if state.hoverClose { true -> C_CLOSE_HOVER, _ -> C_CLOSE_NORMAL }
	// Draw X as two crossing lines
	gui.draw(window, { shape: :line, x1: cbx, y1: cby, x2: cbx + CLOSE_SIZE, y2: cby + CLOSE_SIZE, color: closeColor })
	gui.draw(window, { shape: :line, x1: cbx + CLOSE_SIZE, y1: cby, x2: cbx, y2: cby + CLOSE_SIZE, color: closeColor })

	// Separator line below title bar
	gui.draw(window, { shape: :line, x1: 1, y1: TITLEBAR_H, x2: WIN_W - 2, y2: TITLEBAR_H, color: C_BORDER })

	// Content area
	gui.draw(window, { shape: :text, x: 20, y: TITLEBAR_H + 24, text: 'This window has no OS title bar.' })
	gui.draw(window, { shape: :text, x: 20, y: TITLEBAR_H + 48, text: 'Drag the title bar area to move it.' })
	gui.draw(window, { shape: :text, x: 20, y: TITLEBAR_H + 72, text: 'Click the X to close.' })

	// Accent stripe at bottom
	gui.draw(window, { shape: :rect, x: 1, y: WIN_H - 4, width: WIN_W - 2, height: 3, color: C_ACCENT })

	gui.endFrame(window)
}

// ─── Main ──────────────────────────────────────────────────────────────────

fn main() {
	window := gui.createWindow('Borderless Window', WIN_W, WIN_H, {
		borderless: true
		updateOnDispatch: true
		threading: true
	})

	if window.type != :ok -> {
		println('Could not create window.')
		println(string(window))
		exit(1)
	}

	gui.show(window)

	gui.onMouseMove(window, fn(mx, my) {
		state.hoverClose <- inRect?(mx, my, closeButtonX(), closeButtonY(), CLOSE_SIZE, CLOSE_SIZE)
		if state.dragging -> gui.updateDrag(window)
	})

	gui.onLButtonDown(window, fn(mx, my) {
		if inRect?(mx, my, closeButtonX(), closeButtonY(), CLOSE_SIZE, CLOSE_SIZE) -> {
			gui.close(window)
		}
		// Drag if clicking in the title bar (but not the close button)
		if my < TITLEBAR_H & !inRect?(mx, my, closeButtonX(), closeButtonY(), CLOSE_SIZE, CLOSE_SIZE) -> {
			gui.beginDrag(window)
			state.dragging <- true
		}
	})

	gui.onLButtonUp(window, fn(mx, my) {
		if state.dragging -> {
			gui.endDrag(window)
			state.dragging <- false
		}
	})

	gui.run(window, fn(step) drawFrame(window))
}

main()