Shulou(Shulou.com)06/02 Report--

Description

Derive a control from wxControl and call the OnPaint function to render the control

Examples

Header file

# include "wx/bitmap.h"

# include "wx/control.h"

# include "wx/dcclient.h"

Statement

Class CFlightInstrumentCompass: public wxControl

{

Private:

DECLARE_DYNAMIC_CLASS (CFlightInstrumentCompass)

DECLARE_EVENT_TABLE ()

Public:

CFlightInstrumentCompass () {Init ();}

Void Init () {}

CFlightInstrumentCompass (wxWindow * parent

WxWindowID id

Const wxPoint& pos = wxDefaultPosition

Const wxSize& size = wxDefaultSize

Long style = 0

Const wxValidator& validator = wxDefaultValidator)

{

Init ()

Create (parent, id, pos, size, style, validator)

}

Bool Create (wxWindow * parent

WxWindowID id

Const wxPoint& pos = wxDefaultPosition

Const wxSize& size = wxDefaultSize

Long style = 0

Const wxValidator& validator = wxDefaultValidator)

~ CFlightInstrumentCompass (void)

Protected:

Void OnPaint (wxPaintEvent& event)

}

Define

BEGIN_EVENT_TABLE (CFlightInstrumentCompass, wxControl)

EVT_PAINT (CFlightInstrumentCompass::OnPaint)

END_EVENT_TABLE ()

IMPLEMENT_DYNAMIC_CLASS (CFlightInstrumentCompass, wxControl)

Void CFlightInstrumentCompass::OnPaint (wxPaintEvent& event)

{

}

A reminder

To reduce flicker, rewrite the OnEraseBackground function and leave it blank, indicating that the background no longer needs to be erased

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