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The following application uses source code from Icon Picker Combo Box by Joel Wahlberg and A Color Picker by Luis Ortega.
The LinePickerDlg class implements a dialog designed to allow the selection of Style, Width, and Color attributes for a CPen object:
Environment: VC6
To use this Line Picker dialog, follow these steps:
How to Include Line Picker in Your Project
- Include the following files in your project:
- LinePickerDlg.cpp
- LinePickerDlg.h
- Colorbtn.cpp
- Colorbtn.h
- Linecbbox.cpp
- Linecbbox.h
- Copy “Other.rc” into your “res” directory.
- Add this line to your rc2 file: #include “Other.rc”. Make sure to place a Carriage Return after this line, to avoid the “fatal error RC1004: unexpected end of file found” message.
- Include the line #include “LinePickerDlg.h” in your C++ file.
- Include the line #define IDD_LINEPICKERDLG (5110) in your class header file or in your “Resource.h” file.
How to Use Line Picker
Use the following code to modify the line attributes:
// Create Dialog
CLinePickerDlg *pdlg;
pdlg = new CLinePickerDlg();// Initialize
// (make sure member variables themselves have been previously
// initialized)
pdlg->SetColor(m_crColor);
pdlg->SetWidth(m_nWidth);
pdlg->SetStyle(m_nStyle);// Run modal loop
pdlg->Create(IDD_LINEPICKERDLG);
pdlg->ShowWindow(SW_SHOW);
if(IDOK == pdlg->RunModalLoop(MLF_SHOWONIDLE)){
// Retrieve new line attributes…
m_crColor = pdlg->GetColor();
m_nStyle = pdlg->GetStyle();
m_nWidth = pdlg->GetWidth();
// …and redraw Dialog
Invalidate(true);
}// Clean up!
pdlg->DestroyWindow();
delete pdlg;
To draw thick dotted lines—for instance, from within your OnPaint() method—you will need to use the second version of the CPen constructor:
…
LOGBRUSH lb;
lb.lbStyle = BS_SOLID;
lb.lbColor = m_crColor;
CPen CurPen(PS_GEOMETRIC | m_nStyle, m_nWidth, &lb);
CPen *pOldPen = dc.SelectObject(&CurPen);
…
