From 2b8eaeee4915051b3234a4c6e6076b1419b0ec42 Mon Sep 17 00:00:00 2001
From: filifa <filifa.breath652@8alias.com>
Date: Wed, 4 Sep 2024 20:04:47 -0500
Subject: [PATCH] add flag for smooth transitions

---
 cmd/root.go   | 7 +++++--
 cmd/window.go | 8 ++++----
 2 files changed, 9 insertions(+), 6 deletions(-)

diff --git a/cmd/root.go b/cmd/root.go
index 8903c0e..ecbb50c 100644
--- a/cmd/root.go
+++ b/cmd/root.go
@@ -27,6 +27,7 @@ import (
 
 var preset string
 var scriptPath string
+var transition bool
 
 type script []string
 
@@ -68,9 +69,9 @@ func handleWindowEvent(event *sdl.WindowEvent, m *milkDropWindow) {
 func handleKeyboardEvent(event *sdl.KeyboardEvent, m *milkDropWindow) {
 	scancode := event.Keysym.Scancode
 	if event.Type == sdl.KEYDOWN && scancode == sdl.SCANCODE_RIGHT && event.Repeat == 0 {
-		m.nextPreset()
+		m.nextPreset(transition)
 	} else if event.Type == sdl.KEYDOWN && scancode == sdl.SCANCODE_LEFT && event.Repeat == 0 {
-		m.prevPreset()
+		m.prevPreset(transition)
 	}
 }
 
@@ -167,6 +168,8 @@ func init() {
 
 	// Cobra also supports local flags, which will only run
 	// when this action is called directly.
+	rootCmd.Flags().BoolVarP(&transition, "transition", "t", false, "smoothly transition between presets")
+
 	rootCmd.Flags().StringVarP(&preset, "preset", "p", "", "preset file to use")
 	rootCmd.Flags().StringVarP(&scriptPath, "script", "s", "", "script file to use")
 
diff --git a/cmd/window.go b/cmd/window.go
index 615194f..ab273b6 100644
--- a/cmd/window.go
+++ b/cmd/window.go
@@ -51,14 +51,14 @@ func (m *milkDropWindow) setupPresets(presets []string) {
 	}
 }
 
-func (m *milkDropWindow) nextPreset() {
+func (m *milkDropWindow) nextPreset(smooth bool) {
 	m.preset = m.preset.Next()
-	m.loadPreset(true)
+	m.loadPreset(smooth)
 }
 
-func (m *milkDropWindow) prevPreset() {
+func (m *milkDropWindow) prevPreset(smooth bool) {
 	m.preset = m.preset.Prev()
-	m.loadPreset(true)
+	m.loadPreset(smooth)
 }
 
 func newMilkDropWindow(width, height int32, presets []string) (*milkDropWindow, error) {