From 582e9facab462fa123314b2fc57861c5177b81d2 Mon Sep 17 00:00:00 2001
From: dobrykafe <dobrykafe3@gmail.com>
Date: Thu, 19 Sep 2024 23:50:21 +0200
Subject: [PATCH] add support for vertical arrow key navigation in multi-column
 listboxes

---
 src/game/client/ui.cpp         |  4 ++++
 src/game/client/ui.h           | 18 ++++++++++--------
 src/game/client/ui_listbox.cpp |  6 +++++-
 3 files changed, 19 insertions(+), 9 deletions(-)

diff --git a/src/game/client/ui.cpp b/src/game/client/ui.cpp
index 62658be81..138b01ae2 100644
--- a/src/game/client/ui.cpp
+++ b/src/game/client/ui.cpp
@@ -408,6 +408,10 @@ bool CUi::OnInput(const IInput::CEvent &Event)
 			m_HotkeysPressed |= HOTKEY_UP;
 		else if(Event.m_Key == KEY_DOWN)
 			m_HotkeysPressed |= HOTKEY_DOWN;
+		else if(Event.m_Key == KEY_LEFT)
+			m_HotkeysPressed |= HOTKEY_LEFT;
+		else if(Event.m_Key == KEY_RIGHT)
+			m_HotkeysPressed |= HOTKEY_RIGHT;
 		else if(Event.m_Key == KEY_MOUSE_WHEEL_UP)
 			m_HotkeysPressed |= HOTKEY_SCROLL_UP;
 		else if(Event.m_Key == KEY_MOUSE_WHEEL_DOWN)
diff --git a/src/game/client/ui.h b/src/game/client/ui.h
index 8cf21bd30..72972d9f3 100644
--- a/src/game/client/ui.h
+++ b/src/game/client/ui.h
@@ -446,14 +446,16 @@ public:
 		HOTKEY_ESCAPE = 1 << 1,
 		HOTKEY_UP = 1 << 2,
 		HOTKEY_DOWN = 1 << 3,
-		HOTKEY_DELETE = 1 << 4,
-		HOTKEY_TAB = 1 << 5,
-		HOTKEY_SCROLL_UP = 1 << 6,
-		HOTKEY_SCROLL_DOWN = 1 << 7,
-		HOTKEY_PAGE_UP = 1 << 8,
-		HOTKEY_PAGE_DOWN = 1 << 9,
-		HOTKEY_HOME = 1 << 10,
-		HOTKEY_END = 1 << 11,
+		HOTKEY_LEFT = 1 << 4,
+		HOTKEY_RIGHT = 1 << 5,
+		HOTKEY_DELETE = 1 << 6,
+		HOTKEY_TAB = 1 << 7,
+		HOTKEY_SCROLL_UP = 1 << 8,
+		HOTKEY_SCROLL_DOWN = 1 << 9,
+		HOTKEY_PAGE_UP = 1 << 10,
+		HOTKEY_PAGE_DOWN = 1 << 11,
+		HOTKEY_HOME = 1 << 12,
+		HOTKEY_END = 1 << 13,
 	};
 
 	void ResetUIElement(CUIElement &UIElement) const;
diff --git a/src/game/client/ui_listbox.cpp b/src/game/client/ui_listbox.cpp
index 2a84aebd7..cfbe18ddb 100644
--- a/src/game/client/ui_listbox.cpp
+++ b/src/game/client/ui_listbox.cpp
@@ -100,8 +100,12 @@ void CListBox::DoStart(float RowHeight, int NumItems, int ItemsPerRow, int RowsP
 	if(m_Active && !Input()->ModifierIsPressed() && !Input()->ShiftIsPressed() && !Input()->AltIsPressed())
 	{
 		if(Ui()->ConsumeHotkey(CUi::HOTKEY_DOWN))
-			m_ListBoxNewSelOffset += 1;
+			m_ListBoxNewSelOffset += m_ListBoxItemsPerRow;
 		else if(Ui()->ConsumeHotkey(CUi::HOTKEY_UP))
+			m_ListBoxNewSelOffset -= m_ListBoxItemsPerRow;
+		else if(Ui()->ConsumeHotkey(CUi::HOTKEY_RIGHT) && m_ListBoxItemsPerRow > 1)
+			m_ListBoxNewSelOffset += 1;
+		else if(Ui()->ConsumeHotkey(CUi::HOTKEY_LEFT) && m_ListBoxItemsPerRow > 1)
 			m_ListBoxNewSelOffset -= 1;
 		else if(Ui()->ConsumeHotkey(CUi::HOTKEY_PAGE_UP))
 			m_ListBoxNewSelOffset = -ItemsPerRow * RowsPerScroll * 4;