dgui.core.windowclass source code

1 /** DGui project file.
2 
3 Copyright: Trogu Antonio Davide 2011-2013
4 
5 License: $(HTTP boost.org/LICENSE_1_0.txt, Boost License 1.0).
6 
7 Authors: Trogu Antonio Davide
8 */
9 module dgui.core.windowclass;
10 
11 import std.utf: toUTFz;
12 import dgui.core.charset;
13 import dgui.core.winapi;
14 import dgui.core.exception;
15 import dgui.core.utils;
16 import dgui.canvas;
17 
18 enum
19 {
20 	// Windows Classes
21 	WC_BUTTON 		= "Button",
22 	WC_COMBOBOXEX 	= "ComboBoxEx32",
23 	WC_LISTBOX 		= "ListBox",
24 	WC_LISTVIEW 	= "SysListView32",
25 	WC_PROGRESSBAR  = "msctls_progress32",
26 	WC_RICHEDIT 	= "RichEdit20W",
27 	WC_STATUSBAR 	= "msctls_statusbar32",
28 	WC_TABCONTROL   = "SysTabControl32",
29 	WC_EDIT			= "EDIT",
30 	WC_TOOLBAR 		= "ToolBarWindow32",
31 	WC_TRACKBAR		= "msctls_trackbar32",
32 	WC_TOOLTIP      = "tooltips_class32",
33 	WC_TREEVIEW 	= "SysTreeView32",
34 	//WC_STATIC 		= "STATIC",
35 
36 	// DGui Classes
37 	WC_DPANEL		= "DPanel",
38 	WC_FORM 		= "DForm",
39 	WC_DBUTTON 		= "DButton",
40 	WC_DCHECKBOX 	= "DCheckBox",
41 	WC_DRADIOBUTTON = "DRadioButton",
42 	WC_DCOMBOBOX 	= "DComboBox",
43 	WC_DLABEL 		= "DLabel",
44 	WC_DLISTBOX 	= "DListBox",
45 	WC_DPICTUREBOX  = "DPicturebox",
46 	WC_DLISTVIEW 	= "DListView",
47 	WC_DPROGRESSBAR = "DProgressBar",
48 	WC_DRICHEDIT 	= "DRichTextBox",
49 	WC_DSTATUSBAR 	= "DStatusBar",
50 	WC_DTABCONTROL  = "DTabControl",
51 	WC_DEDIT 		= "DTextBox",
52 	WC_DTOOLBAR 	= "DToolBar",
53 	WC_DTRACKBAR 	= "DTrackBar",
54 	WC_DTOOLTIP     = "DToolTip",
55 	WC_DTREEVIEW 	= "DTreeView",
56 	WC_DGRIDPANEL   = "DGridPanel",
57 	WC_DSPLITPANEL  = "DSplitPanel",
58 }
59 
60 enum ClassStyles: uint
61 {
62 	none 			= 0x00000000,
63 	vRedraw			= 0x00000001,
64 	hRedraw			= 0x00000002,
65 	keyCVTWindow	= 0x00000004,
66 	doubleClicks			= 0x00000008,
67 	ownDC			= 0x00000020,
68 	classDC			= 0x00000040,
69 	parentDC		= 0x00000080,
70 	noKeyCVT		= 0x00000100,
71 	noClose			= 0x00000200,
72 	saveBits		= 0x00000800,
73 	byteAlignClient	= 0x00001000,
74 	byteAlignWindow	= 0x00002000,
75 	globalClass		= 0x00004000,
76 	IME				= 0x00010000,
77 }
78 
79 final class WindowClass
80 {
81 	public static void register(string className, ClassStyles classStyle, Cursor cursor, WNDPROC wndProc)
82 	{
83 		WNDCLASSEXW wc;
84 		wc.cbSize = WNDCLASSEXW.sizeof;
85 
86 		if(!getClassInfoEx(className, &wc))
87 		{
88 			if(!registerClassEx(className, cursor ? cursor.handle : SystemCursors.arrow.handle, null, wndProc, classStyle))
89 			{
90 				throwException!(Win32Exception)("Windows Class '%s' not created", className);
91 			}
92 		}
93 	}
94 
95 	public static WNDPROC superclass(string oldClassName, string newClassName, WNDPROC newWndProc)
96 	{
97 		WNDCLASSEXW oldWc = void, newWc = void;
98 
99 		oldWc.cbSize = WNDCLASSEXW.sizeof;
100 		newWc.cbSize = WNDCLASSEXW.sizeof;
101 
102 		const(wchar)* pNewClassName = toUTFz!(const(wchar)*)(newClassName);
103 		getClassInfoEx(oldClassName, &oldWc);
104 
105 		if(!getClassInfoEx(newClassName, &newWc)) // IF Class Non Found THEN
106 		{
107 			newWc = oldWc;
108 			newWc.style &= ~ClassStyles.globalClass; // Remove Global Class
109 
110 			newWc.lpfnWndProc = newWndProc;
111 			newWc.lpszClassName = pNewClassName;
112 			newWc.hInstance = getHInstance();
113 			//newWc.hbrBackground = null;
114 
115 			if(!registerClassEx(&newWc))
116 			{
117 				throwException!(Win32Exception)("Windows Class '%s' not created", newClassName);
118 			}
119 		}
120 
121 		return oldWc.lpfnWndProc; //Back to the original window procedure
122 	}
123 }