Line data Source code
1 : /*
2 : Minetest
3 : Copyright (C) 2013 celeron55, Perttu Ahola <celeron55@gmail.com>
4 :
5 : This program is free software; you can redistribute it and/or modify
6 : it under the terms of the GNU Lesser General Public License as published by
7 : the Free Software Foundation; either version 2.1 of the License, or
8 : (at your option) any later version.
9 :
10 : This program is distributed in the hope that it will be useful,
11 : but WITHOUT ANY WARRANTY; without even the implied warranty of
12 : MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 : GNU Lesser General Public License for more details.
14 :
15 : You should have received a copy of the GNU Lesser General Public License along
16 : with this program; if not, write to the Free Software Foundation, Inc.,
17 : 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
18 : */
19 :
20 : #ifndef MODALMENU_HEADER
21 : #define MODALMENU_HEADER
22 :
23 : #include "irrlichttypes_extrabloated.h"
24 : #ifdef HAVE_TOUCHSCREENGUI
25 : #include "touchscreengui.h"
26 : #endif
27 :
28 : class GUIModalMenu;
29 :
30 1 : class IMenuManager
31 : {
32 : public:
33 : // A GUIModalMenu calls these when this class is passed as a parameter
34 : virtual void createdMenu(GUIModalMenu *menu) = 0;
35 : virtual void deletingMenu(GUIModalMenu *menu) = 0;
36 : };
37 :
38 : /*
39 : Remember to drop() the menu after creating, so that it can
40 : remove itself when it wants to.
41 : */
42 :
43 : class GUIModalMenu : public gui::IGUIElement
44 : {
45 : public:
46 2 : GUIModalMenu(gui::IGUIEnvironment* env,
47 : gui::IGUIElement* parent, s32 id,
48 : IMenuManager *menumgr):
49 : IGUIElement(gui::EGUIET_ELEMENT, env, parent, id,
50 2 : core::rect<s32>(0,0,100,100))
51 : {
52 : //m_force_regenerate_gui = false;
53 :
54 2 : m_menumgr = menumgr;
55 2 : m_allow_focus_removal = false;
56 2 : m_screensize_old = v2u32(0,0);
57 :
58 2 : setVisible(true);
59 2 : Environment->setFocus(this);
60 2 : m_menumgr->createdMenu(this);
61 2 : }
62 2 : virtual ~GUIModalMenu()
63 4 : {
64 2 : m_menumgr->deletingMenu(this);
65 2 : }
66 :
67 2 : void allowFocusRemoval(bool allow)
68 : {
69 2 : m_allow_focus_removal = allow;
70 2 : }
71 :
72 4 : bool canTakeFocus(gui::IGUIElement *e)
73 : {
74 4 : return (e && (e == this || isMyChild(e))) || m_allow_focus_removal;
75 : }
76 :
77 111 : void draw()
78 : {
79 111 : if(!IsVisible)
80 0 : return;
81 :
82 111 : video::IVideoDriver* driver = Environment->getVideoDriver();
83 111 : v2u32 screensize = driver->getScreenSize();
84 111 : if(screensize != m_screensize_old /*|| m_force_regenerate_gui*/)
85 : {
86 2 : m_screensize_old = screensize;
87 2 : regenerateGui(screensize);
88 : //m_force_regenerate_gui = false;
89 : }
90 :
91 111 : drawMenu();
92 : }
93 :
94 : /*
95 : This should be called when the menu wants to quit.
96 :
97 : WARNING: THIS DEALLOCATES THE MENU FROM MEMORY. Return
98 : immediately if you call this from the menu itself.
99 :
100 : (More precisely, this decrements the reference count.)
101 : */
102 2 : void quitMenu()
103 : {
104 2 : allowFocusRemoval(true);
105 : // This removes Environment's grab on us
106 2 : Environment->removeFocus(this);
107 2 : m_menumgr->deletingMenu(this);
108 2 : this->remove();
109 : #ifdef HAVE_TOUCHSCREENGUI
110 : if (g_touchscreengui)
111 : g_touchscreengui->Show();
112 : #endif
113 2 : }
114 :
115 : void removeChildren()
116 : {
117 : const core::list<gui::IGUIElement*> &children = getChildren();
118 : core::list<gui::IGUIElement*> children_copy;
119 : for(core::list<gui::IGUIElement*>::ConstIterator
120 : i = children.begin(); i != children.end(); i++)
121 : {
122 : children_copy.push_back(*i);
123 : }
124 : for(core::list<gui::IGUIElement*>::Iterator
125 : i = children_copy.begin();
126 : i != children_copy.end(); i++)
127 : {
128 : (*i)->remove();
129 : }
130 : }
131 :
132 : virtual void regenerateGui(v2u32 screensize) = 0;
133 : virtual void drawMenu() = 0;
134 0 : virtual bool preprocessEvent(const SEvent& event) { return false; };
135 2 : virtual bool OnEvent(const SEvent& event) { return false; };
136 0 : virtual bool pausesGame(){ return false; } // Used for pause menu
137 :
138 : protected:
139 : //bool m_force_regenerate_gui;
140 : v2u32 m_screensize_old;
141 : private:
142 : IMenuManager *m_menumgr;
143 : // This might be necessary to expose to the implementation if it
144 : // wants to launch other menus
145 : bool m_allow_focus_removal;
146 : };
147 :
148 :
149 : #endif
150 :
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