基于对话框的C++源代码编辑器制作过程（四）——窗口类代码

云烟 • 2023年 10月 10日上午10:00 • 未分类

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1、首先，在ScintillaWnd.h头文件中添加如下代码

HMODULE m_hSciLexerDll;

欢迎大家来到IT世界,在知识的湖畔探索吧!

如下图：

2、在ScintillaWnd.cpp源文件的构造函数和析构函数中添加如下代码

欢迎大家来到IT世界,在知识的湖畔探索吧!ScintillaWnd::ScintillaWnd()
{
	m_hSciLexerDll = NULL;
	m_hSciLexerDll = LoadLibrary(_T("SciLexer.dll"));
	if (NULL == m_hSciLexerDll)
	{
		AfxMessageBox(_T("LoadLibrary SciLexer.dll failure..."));
	}
}

这是构造函数

ScintillaWnd::~ScintillaWnd()
{
	if (NULL != m_hWnd)
	{
		DestroyWindow();
	}
	if (m_hSciLexerDll != NULL)
	{
		FreeLibrary(m_hSciLexerDll);
	}
}

这是析构函数

3、为窗口类创建Create函数

打开类向导，选择“ScintillaWnd”类，找到“虚函数”，找到“Create”函数，点击“添加函数”。

Create函数

添加完“Create”函数，会自动生成一些代码，这些代码不需要改动，保持原样就好。

4、为窗口类添加Init()函数，先在ScintillaWnd.h中添加下面的代码

欢迎大家来到IT世界,在知识的湖畔探索吧!virtual void Init();

点击图中“小灯泡”，会提示你在ScintillaWnd.cpp文件中创建Init()函数，点击创建。

在创建的Init()函数中添加如下代码

void ScintillaWnd::Init()
{
	// clear all text styles
	SendMessage(SCI_CLEARDOCUMENTSTYLE, 0, 0);
	// set the number of styling bits to 7 - the asp/html views need a lot of styling - default is 5
	// If you leave the default you will see twiggle lines instead of ASP code
	SendMessage(SCI_SETSTYLEBITS, 7, 0);
	// set the display for indetation guides to on - this displays virtical dotted lines from the beginning of
	// a code block to the end of the block
	SendMessage(SCI_SETINDENTATIONGUIDES, TRUE, 0);
	// set tabwidth to 4
	SendMessage(SCI_SETTABWIDTH, 4, 0);
	// set indention to 4
	SendMessage(SCI_SETINDENT, 4, 0);
	// set the caret blinking time to 400 milliseconds
	SendMessage(SCI_SETCARETPERIOD, 400, 0);
	// display fold margins
	SetFold();
	// hide SelectionMargin
	SendMessage(SCI_SETMARGINWIDTHN, 1, 0);
	// set markersymbol for marker type 0 - bookmark
	SendMessage(SCI_MARKERDEFINE, 0, SC_MARK_CIRCLE);
	// set the forground color for some styles
	SendMessage(SCI_STYLESETFORE, 0, RGB(0, 0, 0));
	SendMessage(SCI_STYLESETFORE, 2, RGB(0, 64, 0));
	SendMessage(SCI_STYLESETFORE, 5, RGB(0, 0, 255));
	SendMessage(SCI_STYLESETFORE, 6, RGB(200, 20, 0));
	SendMessage(SCI_STYLESETFORE, 9, RGB(0, 0, 255));
	SendMessage(SCI_STYLESETFORE, 10, RGB(255, 0, 64));
	SendMessage(SCI_STYLESETFORE, 11, RGB(0, 0, 0));
	// set the backgroundcolor of brace highlights
	SendMessage(SCI_STYLESETBACK, STYLE_BRACELIGHT, RGB(0, 255, 0));
	// set end of line mode to CRLF
	SendMessage(SCI_CONVERTEOLS, 2, 0);
	SendMessage(SCI_SETEOLMODE, 2, 0);
	// SendMessage(SCI_SETVIEWEOL, TRUE, 0);
	//显示当前行的淡黄色背景
	SendMessage(SCI_SETCARETLINEVISIBLE, TRUE, 0);
	SendMessage(SCI_SETCARETLINEBACK, RGB(255, 255, 0), 0);
	SendMessage(SCI_SETCARETLINEBACKALPHA, 100, 0);
}

注意：要在ScintillaWnd.h头文件中包含Scintilla.h和SciLexer.h头文件

为窗口类添加InitScintillaEdit函数，在ScintillaWnd.h中添加下面的代码

void InitScintillaEdit(int nSize, const TCHAR* face);

用同样的方法，在ScintillaWnd.cpp文件中创建InitScintillaEdit函数

在创建的InitScintillaEdit函数添加如下代码

void ScintillaWnd::InitScintillaEdit(int nSize, const TCHAR * face)
{
	setCppSyntax();
	Init();
	SetDefaultColorFont(nSize, face);
	UpdateLineNumberWidth();
}

为窗口类添加SetDefaultColorFont函数

void SetDefaultColorFont(int nSize, const TCHAR* face);

在创建的SetDefaultColorFont函数添加如下代码

void ScintillaWnd::SetDefaultColorFont(int nSize, const TCHAR * face)
{
	SendMessage(SCI_SETSELFORE, TRUE, RGB(255, 255, 255));
	//选中行的颜色
	SendMessage(SCI_SETSELBACK, TRUE, RGB(10, 36, 106));
	//默认文本颜色
	SendMessage(SCI_STYLESETFORE, STYLE_DEFAULT, RGB(0x00, 0x00, 0x00));
	SendMessage(SCI_STYLESETBACK, STYLE_DEFAULT, RGB(0xff, 0xff, 0xff));
	SendMessage(SCI_STYLESETSIZE, STYLE_DEFAULT, nSize);
	SendMessage(SCI_STYLESETFONT, STYLE_DEFAULT, reinterpret_cast<LPARAM>(face));
}

为窗口类添加SetFold函数

void SetFold(BOOL bFold = TRUE);

在创建的SetFold函数添加如下代码

void ScintillaWnd::SetFold(BOOL bFold)
{
	if (bFold)
	{
		// source folding section
		// tell the lexer that we want folding information - the lexer supplies "folding levels"
		SendMessage(SCI_SETPROPERTY, (WPARAM) "fold", (LPARAM)"1");
		SendMessage(SCI_SETPROPERTY, (WPARAM) "fold.html", (LPARAM)"1");
		SendMessage(SCI_SETPROPERTY, (WPARAM) "fold.html.preprocessor", (LPARAM)"1");
		SendMessage(SCI_SETPROPERTY, (WPARAM) "fold.comment", (LPARAM)"1");
		SendMessage(SCI_SETPROPERTY, (WPARAM) "fold.at.else", (LPARAM)"1");
		SendMessage(SCI_SETPROPERTY, (WPARAM) "fold.flags", (LPARAM)"1");
		SendMessage(SCI_SETPROPERTY, (WPARAM) "fold.preprocessor", (LPARAM)"1");
		SendMessage(SCI_SETPROPERTY, (WPARAM) "styling.within.preprocessor", (LPARAM)"1");
		SetMarginWidthN(2, 16); //SendMessage( SCI_SETMARGINWIDTHN, 2, 16 ); // FoldMargin
		SendMessage(SCI_SETMARGINTYPEN, 2, SC_MARGIN_SYMBOL);//页边类型
		SendMessage(SCI_SETMARGINMASKN, 2, SC_MASK_FOLDERS); //页边掩码
		SendMessage(SCI_SETMARGINWIDTHN, 2, 16); //页边宽度
		SendMessage(SCI_SETMARGINSENSITIVEN, 2, TRUE); //响应鼠标消息
		// 折叠标签样式
		SendMessage(SCI_MARKERDEFINE, SC_MARKNUM_FOLDER, SC_MARK_CIRCLEPLUS);
		SendMessage(SCI_MARKERDEFINE, SC_MARKNUM_FOLDEROPEN, SC_MARK_CIRCLEMINUS);
		SendMessage(SCI_MARKERDEFINE, SC_MARKNUM_FOLDEREND, SC_MARK_CIRCLEPLUSCONNECTED);
		SendMessage(SCI_MARKERDEFINE, SC_MARKNUM_FOLDEROPENMID, SC_MARK_CIRCLEMINUSCONNECTED);
		SendMessage(SCI_MARKERDEFINE, SC_MARKNUM_FOLDERMIDTAIL, SC_MARK_TCORNERCURVE);
		SendMessage(SCI_MARKERDEFINE, SC_MARKNUM_FOLDERSUB, SC_MARK_VLINE);
		SendMessage(SCI_MARKERDEFINE, SC_MARKNUM_FOLDERTAIL, SC_MARK_LCORNERCURVE);
		// 折叠标签线颜色
		SendMessage(SCI_MARKERSETBACK, SC_MARKNUM_FOLDERSUB, 0xff0000); //蓝色
		SendMessage(SCI_MARKERSETBACK, SC_MARKNUM_FOLDERMIDTAIL, 0xff0000);
		SendMessage(SCI_MARKERSETBACK, SC_MARKNUM_FOLDERTAIL, 0xff0000);
		SendMessage(SCI_SETFOLDFLAGS, 16 | 4, 0); //如果折叠就在折叠行的上下各画一条横线
	}
	else
	{
		SetMarginWidthN(2, 0); //SendMessage( SCI_SETMARGINWIDTHN, 2, 0 ); // FoldMargin
	}
}

为窗口类添加ToggleFold函数

void ToggleFold(long line);

在创建的SetFold函数添加如下代码

void ScintillaWnd::ToggleFold(long line)
{
	SendMessage(SCI_TOGGLEFOLD, static_cast<WPARAM>(line), 0);
}

为窗口类添加GetMarginWidthN函数

int GetMarginWidthN(int margin);

在创建的GetMarginWidthN函数添加如下代码

int ScintillaWnd::GetMarginWidthN(int margin)
{
	return SendMessage(SCI_GETMARGINWIDTHN, static_cast<WPARAM>(margin), 0);
}

为窗口类添加SetMarginWidthN函数

void SetMarginWidthN(int margin, int mask);

在创建的SetMarginWidthN函数添加如下代码

void ScintillaWnd::SetMarginWidthN(int margin, int mask)
{
	SendMessage(SCI_SETMARGINWIDTHN, static_cast<WPARAM>(margin), static_cast<LPARAM>(mask));
}

为窗口类添加UpdateLineNumberWidth函数

void UpdateLineNumberWidth(void);

在创建的UpdateLineNumberWidth函数添加如下代码

void ScintillaWnd::UpdateLineNumberWidth(void)
{
	//start 显示行号
	long iLineMarginWidthNow;
	long iLineMarginWidthFit;
	long iLineNum = SendMessage(SCI_GETLINECOUNT, 0, 0);
	long iLineNumCount = 1;
	while (iLineNum != 0)
	{
		++iLineNumCount;
		iLineNum /= 10;
	}
	iLineMarginWidthNow = SendMessage(SCI_GETMARGINWIDTHN, 0, 0);
	long charWidth = SendMessage(SCI_TEXTWIDTH, STYLE_LINENUMBER, (LPARAM)("9"));
	iLineMarginWidthFit = charWidth * iLineNumCount;
	if (iLineMarginWidthNow != iLineMarginWidthFit)
	{
		SendMessage(SCI_SETMARGINWIDTHN, 0, iLineMarginWidthFit);
	}
	//end of 显示行号
}

为窗口类添加LineFromPosition函数

long LineFromPosition(long pos);

在创建的LineFromPosition函数添加如下代码

long ScintillaWnd::LineFromPosition(long pos)
{
	return SendMessage(SCI_LINEFROMPOSITION, static_cast<WPARAM>(pos), 0);
}

ScintillaWnd窗口类的大部分代码已经添加完成，后续还要添加一些代码，下一章会讲在CCppEditorDlg类中添加代码，给CCppEditorDlg类添加完代码后，项目就可以编译运行了，但这只是一个简单的版本，我还会添加功能，到时候再为大家讲解。

（未完待续）

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