dguihub.richtextbox 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 
10 /*
11    From MSDN
12 
13    Rich Edit version	DLL	Window Class
14    ----
15    1.0	Riched32.dll	RICHEDIT_CLASS
16    2.0	Riched20.dll	RICHEDIT_CLASS
17    3.0	Riched20.dll	RICHEDIT_CLASS
18    4.1	Msftedit.dll	MSFTEDIT_CLASS
19 
20    Windows XP SP1:  Includes Microsoft Rich Edit 4.1, Microsoft Rich Edit 3.0, and a Microsoft Rich Edit 1.0 emulator.
21    Windows XP: 		Includes Microsoft Rich Edit 3.0 with a Microsoft Rich Edit 1.0 emulator.
22    Windows Me: 		Includes Microsoft Rich Edit 1.0 and 3.0.
23    Windows 2000:	Includes Microsoft Rich Edit 3.0 with a Microsoft Rich Edit 1.0 emulator.
24    Windows NT 4.0:	Includes Microsoft Rich Edit 1.0 and 2.0.
25    Windows 98:		Includes Microsoft Rich Edit 1.0 and 2.0.
26    Windows 95:		Includes only Microsoft Rich Edit 1.0. However, Riched20.dll is compatible with Windows 95 and may be installed by an application that requires it.
27  */
28 
29 module dguihub.richtextbox;
30 
31 public import dguihub.core.controls.textcontrol;
32 
33 class RichTextBox : TextControl {
34    private static int _refCount = 0;
35    private static HMODULE _hRichDLL;
36 
37    public override void dispose() {
38       --_refCount;
39 
40       if (!_refCount) {
41          FreeLibrary(_hRichDLL);
42          _hRichDLL = null;
43       }
44 
45       super.dispose();
46    }
47 
48    public void redo() {
49       this.sendMessage(EM_REDO, 0, 0);
50    }
51 
52    protected override void createControlParams(ref CreateControlParams ccp) {
53       // Probably the RichTextbox ignores the wParam parameter in WM_PAINT
54 
55       ++_refCount;
56 
57       if (!_hRichDLL) {
58          _hRichDLL = loadLibrary("RichEd20.dll"); // Load the standard version
59       }
60 
61       this.setStyle(ES_MULTILINE | ES_WANTRETURN, true);
62       ccp.superclassName = WC_RICHEDIT;
63       ccp.className = WC_DRICHEDIT;
64 
65       super.createControlParams(ccp);
66    }
67 
68    protected override void onHandleCreated(EventArgs e) {
69       super.onHandleCreated(e);
70 
71       this.sendMessage(EM_SETEVENTMASK, 0, ENM_CHANGE | ENM_UPDATE);
72       this.sendMessage(EM_SETBKGNDCOLOR, 0, this._backColor.colorref);
73    }
74 }