Advanced MFC Programming

Chapter 9. Font
CGDIDoc for this command, and the corresponding member function CGDIDoc::OnDialogProgress() is
implemneted as follows:
void CGDIDoc::OnDialogProgress()
{
CProgDlg dlg;
}
dlg.DoModal();
After all these implementations, we can execute command Dialog | Progress to test the percentage bar.
9.4 One-Line Text Editor, Step 1: Displaying a Static String
From now on we are going to implement a very simple one-line text editor: it will display only one line
text that can be edited through using mouse and keyboard. We will implement many features of a standard
editor such as font selection, changing text styles. The sample application in this section does not introduce
any new concept, it is the base of later sections.
Sample 9.4\GDI is a standard SDI application generated by Application Wizard. Because the
horizontal size of the text string may be bigger than that of the client window as the user input more and
more characters, we need to add scroll bars to the application. In order to do this, we can choose
CScrollView as the base class of the client window in the final step of Application Wizard.
The sample does nothing but displaying a static text in the client window. Other features of text editor
will be implemented in later sections.
Two variables m_szText and m_ftDraw along with two member functions are declared in class
CGDIDoc:
class CGDIDoc : public CDocument
{
protected:
CGDIDoc();
DECLARE_DYNCREATE(CGDIDoc)
CString m_szText;
CFont m_ftDraw;
……
public:
CString GetText(){return m_szText;}
CFont *GetFont(){return &m_ftDraw;}
//{{AFX_VIRTUAL(CGDIDoc)
public:
};
Variable m_szText will be used to store the text string, and m_ftDraw will be used to store the font used
for text drawing. Functions CGDIDoc::GetText() and CGDIDoc::GetFont() provide a way of accessing the
two member variables outside class CGDIDoc.
Because we still do not have an interactive input environment, in the constructor, variable m_szText is
initialized to a fixed string:
CGDIDoc::CGDIDoc()
{
m_szText="This is just a test string";
}
In the sample, function CGDIDoc::OnNewDocument() is modified as follows:
BOOL CGDIDoc::OnNewDocument()
{
CClientDC dc(NULL);
LOGFONT lf;
250