From b4757306fbc36762c02fc662a84b7bd75e0b1b44 Mon Sep 17 00:00:00 2001
From: NakaokaRei <reideeplearning@gmail.com>
Date: Tue, 24 Jan 2023 00:49:08 +0900
Subject: [PATCH] add: scroll event

---
 Sample/Sample/ContentView.swift         | 21 ++++++++++-
 Sources/SwiftAutoGUI/SwiftAutoGUI.swift | 48 +++++++++++++++++++++++++
 2 files changed, 68 insertions(+), 1 deletion(-)

diff --git a/Sample/Sample/ContentView.swift b/Sample/Sample/ContentView.swift
index 10d03ea..78d1883 100644
--- a/Sample/Sample/ContentView.swift
+++ b/Sample/Sample/ContentView.swift
@@ -10,7 +10,10 @@ import SwiftAutoGUI
 
 struct ContentView: View {
     var body: some View {
-        VStack {
+        ScrollView {
+            ForEach(0..<10) {
+                Text("\($0)").font(.title)
+            }
             Button("key event") {
                 SwiftAutoGUI.sendKeyShortcut([.control, .leftArrow])
             }
@@ -24,6 +27,22 @@ struct ContentView: View {
             Button("click") {
                 SwiftAutoGUI.leftClick()
             }
+            Button("vscroll") {
+                SwiftAutoGUI.vscroll(clicks: 10)
+            }
+            ForEach(0..<10) {
+                Text("\($0)").font(.title)
+            }
+            ScrollView(.horizontal) {
+                HStack {
+                    ForEach(0..<10) {
+                        Text("\($0)").font(.title)
+                    }
+                    Button("hscroll") {
+                        SwiftAutoGUI.hscroll(clicks: 10)
+                    }
+                }
+            }
         }
         .padding()
     }
diff --git a/Sources/SwiftAutoGUI/SwiftAutoGUI.swift b/Sources/SwiftAutoGUI/SwiftAutoGUI.swift
index 41bf4db..8ab8b84 100644
--- a/Sources/SwiftAutoGUI/SwiftAutoGUI.swift
+++ b/Sources/SwiftAutoGUI/SwiftAutoGUI.swift
@@ -83,6 +83,54 @@ public class SwiftAutoGUI {
         leftClickUp(position: to)
     }
 
+    public static func vscroll(clicks: Int) {
+        for _ in 0...Int(abs(clicks) / 10) {
+            let scrollEvent = CGEvent(
+                scrollWheelEvent2Source: nil,
+                units: .line,
+                wheelCount: 1,
+                wheel1: clicks >= 10 ? 10 : -10,
+                wheel2: 0,
+                wheel3: 0
+            )
+            scrollEvent?.post(tap: .cghidEventTap)
+        }
+
+        let scrollEvent = CGEvent(
+            scrollWheelEvent2Source: nil,
+            units: .line,
+            wheelCount: 1,
+            wheel1: Int32(clicks >= 10 ? clicks % 10 : -1 * (-clicks % 10)),
+            wheel2: 0,
+            wheel3: 0
+        )
+        scrollEvent?.post(tap: .cghidEventTap)
+    }
+
+    public static func hscroll(clicks: Int) {
+        for _ in 0...Int(abs(clicks) / 10) {
+            let scrollEvent = CGEvent(
+                scrollWheelEvent2Source: nil,
+                units: .line,
+                wheelCount: 2,
+                wheel1: 0,
+                wheel2: clicks >= 10 ? 10 : -10,
+                wheel3: 0
+            )
+            scrollEvent?.post(tap: .cghidEventTap)
+        }
+
+        let scrollEvent = CGEvent(
+            scrollWheelEvent2Source: nil,
+            units: .line,
+            wheelCount: 2,
+            wheel1: 0,
+            wheel2: Int32(clicks >= 10 ? clicks % 10 : -1 * (-clicks % 10)),
+            wheel3: 0
+        )
+        scrollEvent?.post(tap: .cghidEventTap)
+    }
+
     private static func leftClickDown(position: CGPoint) {
         let source = CGEventSource(stateID: CGEventSourceStateID.hidSystemState)
         let event = CGEvent(mouseEventSource: source, mouseType: CGEventType.leftMouseDown,