Merge pull request #235 from fgrosse/window-initial-position

Support setting an initial window position

CHANGELOG.md

@@ -3,8 +3,10 @@ All notable changes to this project will be documented in this file.
 
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
+
 ## [Unreleased]
 - Pending physical testing, Gamepad API support from [PR-233](https://github.com/faiface/pixel/pull/233)
+- Support setting an initial window position
 
 ## [v0.10.0-beta] 2020-05-10
 - Add `WindowConfig.TransparentFramebuffer` option to support window transparency onto the background

pixelgl/window.go

@@ -36,6 +36,9 @@ type WindowConfig struct {
 	// Bounds specify the bounds of the Window in pixels.
 	Bounds pixel.Rect
 
+	// Initial window position
+	Position pixel.Vec
+
 	// If set to nil, the Window will be windowed. Otherwise it will be fullscreen on the
 	// specified Monitor.
 	Monitor *Monitor
@@ -120,6 +123,10 @@ func NewWindow(cfg WindowConfig) (*Window, error) {
 		glfw.WindowHint(glfw.AutoIconify, bool2int[!cfg.NoIconify])
 		glfw.WindowHint(glfw.TransparentFramebuffer, bool2int[cfg.TransparentFramebuffer])
 
+		if cfg.Position.X != 0 || cfg.Position.Y != 0 {
+			glfw.WindowHint(glfw.Visible, glfw.False)
+		}
+
 		var share *glfw.Window
 		if currWin != nil {
 			share = currWin.window
@@ -136,6 +143,11 @@ func NewWindow(cfg WindowConfig) (*Window, error) {
 			return err
 		}
 
+		if cfg.Position.X != 0 || cfg.Position.Y != 0 {
+			w.window.SetPos(int(cfg.Position.X), int(cfg.Position.Y))
+			w.window.Show()
+		}
+
 		// enter the OpenGL context
 		w.begin()
 		glhf.Init()