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143 lines
4.7 KiB
143 lines
4.7 KiB
14 years ago
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0//EN" "http://www.w3.org/TR/REC-html40/strict.dtd">
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<html><head><meta content="text/html; charset=iso-8859-1" http-equiv="Content-Type"><title>How to use the Scintilla Edit Control in windows?</title></head><body bgcolor="#ffffff">
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<p><h2>How to use the Scintilla Edit Control in windows?</h2>
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<p>
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This should be a little step by step explanation how to use Scintilla in the windows environment.
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</p>
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</p>
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<p><h2>How to create Scintilla Edit Control?</h2>
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<p>
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First of all, load the Scintilla DLL with something like:
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</p>
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<pre>
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hmod = LoadLibrary("SciLexer.DLL");
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if (hmod==NULL)
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{
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MessageBox(hwndParent,
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"The Scintilla DLL could not be loaded.",
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"Error loading Scintilla",
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MB_OK | MB_ICONERROR);
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}
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</pre>
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<p>
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If the DLL was loaded successfully, then the DLL has registered (yes, by itself) a new
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window class. The new class called "Scintilla" is the new scintilla edit control.
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</p>
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<p>
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Now you can use this new control just like any other windows control.
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</p>
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<pre>
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hwndScintilla = CreateWindowEx(0,
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"Scintilla","", WS_CHILD | WS_VISIBLE | WS_TABSTOP | WS_CLIPCHILDREN,
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10,10,500,400,hwndParent,(HMENU)GuiID, hInstance,NULL);
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</pre>
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<p>
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Note the new window class name: "Scintilla". By reaching this point you actually included
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a Scintilla Edit Control to your windows program.
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</p>
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</p>
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<p><h2>How to control the Scintilla Edit Control?</h2>
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<p>
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You can control Scintilla by sending commands to the Edit Control.
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There a 2 ways of doing this. A simple and fast way.
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</p>
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<p><h3>The simple way to control Scintilla</h3>
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<p>
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The simple way is just like with any other windows control. You can send messages to the
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Scintilla Edit Control and receive notifications from the control. (Note that the notifications
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are sent to the parent window of the Scintilla Edit Control.)
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</p>
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<p>
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The Scintilla Edit Control knows a special message for each command.
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To send commands to the Scintilla Edit Control you can use the SendMessage function.
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</p>
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<pre>
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SendMessage(hwndScintilla,sci_command,wparam,lparam);
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</pre>
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<p>
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like:
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</p>
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<pre>
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SendMessage(hwndScintilla,SCI_CREATEDOCUMENT, 0, 0);
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</pre>
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<p>
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Some of the commands will return a value and unused parameters should be set to NULL.
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</p>
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</p>
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<p><h3>The fast way to control Scintilla</h3>
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<p>
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The fast way of controlling the Scintilla Edit Control is to call message handling function by yourself.
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You can retrieve a pointer to the message handling function of the Scintilla Edit Control and
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call it directly to execute a command. This way is much more faster than the SendMessage() way.
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</p>
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<p>
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1st you have to use the SCI_GETDIRECTFUNCTION and SCI_GETDIRECTPOINTER commands to
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retrieve the pointer to the function and a pointer which must be the first parameter when calling the retrieved
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function pointer.
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You have to do this with the SendMessage way :)
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</p>
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<p>
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The whole thing has to look like this:
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</p>
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<pre>
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int (*fn)(void*,int,int,int);
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void * ptr;
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int canundo;
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fn = (int (__cdecl *)(void *,int,int,int))SendMessage(
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hwndScintilla,SCI_GETDIRECTFUNCTION,0,0);
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ptr = (void *)SendMessage(hwndScintilla,SCI_GETDIRECTPOINTER,0,0);
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canundo = fn(ptr,SCI_CANUNDO,0,0);
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</pre>
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<p>
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with "fn" as the function pointer to the message handling function of the Scintilla Control
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and "ptr" as the pointer that must be used as 1st parameter.
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The next parameters are the Scintilla Command with its two (optional) parameters.
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</p>
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</p>
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<p><h3>How will I receive notifications?</h3>
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<p>
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Whenever an event occurs where Scintilla wants to inform you about something, the Scintilla Edit Control
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will send notification to the parent window. This is done by a WM_NOTITY message.
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When receiving that message, you have to look in the xxx struct for the actual message.
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</p>
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<p>
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So in Scintillas parent window message handling function you have to include some code like this:
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</p>
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<pre>
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NMHDR *lpnmhdr;
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[...]
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case WM_NOTIFY:
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lpnmhdr = (LPNMHDR) lParam;
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if(lpnmhdr->hwndFrom==hwndScintilla)
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{
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switch(lpnmhdr->code)
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{
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case SCN_CHARADDED:
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/* Hey, Scintilla just told me that a new */
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/* character was added to the Edit Control.*/
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/* Now i do something cool with that char. */
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break;
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}
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}
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break;
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</pre>
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</p>
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</p>
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<p>
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<i>Page contributed by Holger Schmidt.</i>
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</p>
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</body></html>
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