From ea2353f282a48a4474b32a1ab604eaf1aeff4e2b Mon Sep 17 00:00:00 2001
From: Daniel Karbach <daniel.karbach@localhorst.tv>
Date: Sat, 17 Nov 2012 14:18:08 +0100
Subject: [PATCH] added 'dual' menu state

in this state, the selected cursor is saved and another cursor can be moved
---
 src/graphics/Menu.h | 27 +++++++++++++++++++++++++++
 1 file changed, 27 insertions(+)

diff --git a/src/graphics/Menu.h b/src/graphics/Menu.h
index 68deef8..b29e968 100644
--- a/src/graphics/Menu.h
+++ b/src/graphics/Menu.h
@@ -13,6 +13,7 @@
 #include "Sprite.h"
 #include "../geometry/Vector.h"
 
+#include <algorithm>
 #include <vector>
 #include <SDL.h>
 
@@ -63,8 +64,10 @@ public:
 	void SetInactive() { state = STATE_INACTIVE; }
 	void SetActive() { state = STATE_ACTIVE; }
 	void SetSelected() { state = STATE_SELECTED; }
+	void SetDualSelection() { state = STATE_DUAL; secondarySelection = selected; }
 	bool IsActive() const { return state == STATE_ACTIVE; }
 	bool HasSelected() const { return state == STATE_SELECTED; }
+	bool InDualMode() const { return state == STATE_DUAL; }
 
 	int Width() const;
 	int Height() const;
@@ -78,12 +81,22 @@ public:
 	int SelectedNumber() const { return entries[selected].number; }
 	bool SelectedIsEnabled() const { return entries[selected].enabled; }
 
+	T &SecondarySelection() { return entries[secondarySelection].value; }
+	const T &SecondarySelection() const { return entries[secondarySelection].value; }
+	const char *SecondaryTitle() const { return entries[secondarySelection].title; }
+	int SecondaryNumber() const { return entries[secondarySelection].number; }
+	bool SecondaryIsEnabled() const { return entries[secondarySelection].enabled; }
+
+	void SwapSelected() { SwapEntriesAt(selected, secondarySelection); }
+	void SwapEntriesAt(int lhs, int rhs) { std::swap(entries[lhs], entries[rhs]); }
+
 	void NextItem();
 	void PreviousItem();
 	void NextRow();
 	void PreviousRow();
 	void SelectIndex(int index);
 	int SelectedIndex() const { return selected; }
+	int SecondaryIndex() const { return secondarySelection; }
 	bool IsSelected(int index) const { return index == selected; }
 
 	int EntryCount() const { return entries.size(); }
@@ -116,11 +129,13 @@ private:
 	};
 	std::vector<Entry> entries;
 	int selected;
+	int secondarySelection;
 	int topRow;
 	enum State {
 		STATE_INACTIVE,
 		STATE_ACTIVE,
 		STATE_SELECTED,
+		STATE_DUAL,
 	};
 	State state;
 
@@ -131,6 +146,7 @@ template<class T>
 Menu<T>::Menu()
 : MenuProperties()
 , selected(0)
+, secondarySelection(0)
 , topRow(0)
 , state(STATE_ACTIVE) {
 
@@ -140,6 +156,7 @@ template<class T>
 Menu<T>::Menu(const MenuProperties &p)
 : MenuProperties(p)
 , selected(0)
+, secondarySelection(0)
 , topRow(0)
 , state(STATE_ACTIVE) {
 
@@ -271,6 +288,16 @@ void Menu<T>::Draw(SDL_Surface *dest, const geometry::Vector<int> &position) con
 		case STATE_SELECTED:
 			selectedCursor->Draw(dest, position + cursorOffset);
 			break;
+		case STATE_DUAL:
+			cursor->Draw(dest, position + cursorOffset
+					- geometry::Vector<int>(selectedCursor->Width(), 0));
+			if (secondarySelection >= start && secondarySelection <= end) {
+				geometry::Vector<int> secondaryOffset(
+						(secondarySelection % cols) * (ColWidth() + colGap) - cursor->Width(),
+						((secondarySelection - start) / cols) * RowHeight());
+				selectedCursor->Draw(dest, position + secondaryOffset);
+			}
+			break;
 	}
 }
 
-- 
2.39.2