C++ wxDC::DrawEllipticArc方法代码示例

void kwxAngularMeter::DrawSectors(wxDC &dc)
{
	double starc,endarc;
	int secount,dx,dy;
	int w,h ;

	double val;

	GetClientSize(&w,&h);

	wxRect innerRect;
	innerRect.x = w*2/35;
	innerRect.y = h*2/35;
	innerRect.width = w-2*innerRect.x;
	innerRect.height = h-2*innerRect.y;

	//Arch -> sectors
	//dc.SetPen(*wxThePenList->FindOrCreatePen(*wxBLACK, 1, wxSOLID));
	dc.SetPen(*wxThePenList->FindOrCreatePen(*wxBLACK, 1, wxTRANSPARENT));

	starc = m_nAngleStart;
	endarc = starc + ((m_nAngleEnd - m_nAngleStart) / (double)m_nSec);
	//dc.SetBrush(*wxTheBrushList->FindOrCreateBrush(*wxRED,wxSOLID));
	for(secount=0;secount<m_nSec;secount++)
	{
		dc.SetPen(*wxThePenList->FindOrCreatePen(*wxBLACK, 1, wxTRANSPARENT));
		dc.SetBrush(*wxTheBrushList->FindOrCreateBrush(m_aSectorColor[secount],wxSOLID));
		dc.DrawEllipticArc(0,0,w,h,180 - endarc,180 - starc);

		dc.SetBrush(*wxTheBrushList->FindOrCreateBrush(m_cBackColour,wxSOLID));
		dc.DrawEllipticArc(innerRect.x,innerRect.y,innerRect.width,innerRect.height,180 - endarc,180 - starc);

		starc = endarc;
		endarc += ((m_nAngleEnd - m_nAngleStart) / (double)m_nSec);
	}



	val = (m_nAngleStart * m_dPI) / 180.0;
	dx = cos(val) * h / 2.0;
	dy = sin(val) * h / 2.0;

	dc.DrawLine(w / 2, h / 2, (w / 2) - dx, (h / 2) - dy);	//left line

	val = (m_nAngleEnd * m_dPI) / 180.0;
	dx = cos(val) * h / 2.0;
	dy = sin(val) * h / 2.0;

	dc.DrawLine(w / 2, h / 2, (w / 2) - dx, (h / 2) - dy);	//right line

}

void AngularMeter::DrawSectors(wxDC &dc)
{
	int w,h ;


	GetClientSize(&w,&h);

	int hOffset = 0;
	int wOffset = 0;
	if (w > h) wOffset = (w - h) / 2;
	if (h > w) hOffset = (h - w) / 2;

	//square out the size
	if (w > h) w=h;
	if (h > w) h=w;

	//Draw the dial
	dc.SetPen(*wxThePenList->FindOrCreatePen(_dialColor,1 , wxSOLID));
	dc.SetBrush(*wxTheBrushList->FindOrCreateBrush(_dialColor,wxSOLID));
	dc.DrawEllipticArc(0 + wOffset, 0 + hOffset, w, h, 0,  360);

	dc.SetBrush(*wxTheBrushList->FindOrCreateBrush(*wxBLACK, wxTRANSPARENT));

	dc.SetPen(*wxThePenList->FindOrCreatePen(wxColor(0x25,0x25,0x25), 2, wxSOLID));
	dc.DrawEllipticArc(0 + wOffset, 0 + hOffset, w, h, 45, -135);

	dc.SetPen(*wxThePenList->FindOrCreatePen(wxColor(0x55,0x55,0x55), 2, wxSOLID));
	dc.DrawEllipticArc(0 + wOffset, 0 + hOffset, w, h, -135, 45);
	//Done drawing dial

	//Draw warning range

	if (_realWarningValue > 0){
		dc.SetPen(*wxThePenList->FindOrCreatePen(_warningColor,2, wxSOLID));
		dc.SetBrush(*wxTheBrushList->FindOrCreateBrush(_warningColor, wxFDIAGONAL_HATCH));
		double warningEnd = _angleEnd - _scaledWarningValue;

		double warningStart = (_realAlertValue > 0 ? _angleEnd - _scaledAlertValue : _angleStart);

		dc.DrawEllipticArc(0 + wOffset + 1, 0 + hOffset + 1, w - 2, h - 2, warningStart, warningEnd);
	}
	if (_realAlertValue > 0){
		dc.SetPen(*wxThePenList->FindOrCreatePen(_alertColor, 3, wxSOLID));
		dc.SetBrush(*wxTheBrushList->FindOrCreateBrush(_alertColor, wxBDIAGONAL_HATCH));
		dc.DrawEllipticArc(0 + wOffset + 1, 0 + hOffset + 1, w - 2, h - 2, _angleStart, _angleEnd - _scaledAlertValue);
	}
}

void kwxAngularMeter::DrawSectors(wxDC &dc)
{
	double starc,endarc;
	int secount,dx,dy;
	int w,h ;

	double val;
	
	GetClientSize(&w,&h);

	//arco -> settori
	dc.SetPen(*wxThePenList->FindOrCreatePen(*wxBLACK, 1, wxSOLID));

	starc = m_nAngleStart;
	endarc = starc + ((m_nAngleEnd - m_nAngleStart) / (double)m_nSec);
	//dc.SetBrush(*wxTheBrushList->FindOrCreateBrush(*wxRED,wxSOLID));
	for(secount=0;secount<m_nSec;secount++)
	{
		dc.SetBrush(*wxTheBrushList->FindOrCreateBrush(m_aSectorColor[secount],wxSOLID));
		dc.DrawEllipticArc(0,0,w,h,180 - endarc,180 - starc);
		//dc.DrawEllipticArc(0,0,w,h,0,180);
		starc = endarc;
		endarc += ((m_nAngleEnd - m_nAngleStart) / (double)m_nSec);
	}

	val = (m_nAngleStart * m_dPI) / 180.0;
	dx = static_cast<int>(cos(val) * h / 2.0);
	dy = static_cast<int>(sin(val) * h / 2.0);

	dc.DrawLine(w / 2, h / 2, (w / 2) - dx, (h / 2) - dy);	//linea sinistra

	val = (m_nAngleEnd * m_dPI) / 180.0;
	dx = static_cast<int>(cos(val) * h / 2.0);
	dy = static_cast<int>(sin(val) * h / 2.0);
		
	dc.DrawLine(w / 2, h / 2, (w / 2) - dx, (h / 2) - dy);	//linea destra

}

void MyApp::Draw(wxDC&dc)
{
    // This routine just draws a bunch of random stuff on the screen so that we
    // can check that different types of object are being drawn consistently
    // between the screen image, the print preview image (at various zoom
    // levels), and the printed page.
    dc.SetBackground(*wxWHITE_BRUSH);
    // dc.Clear();
    dc.SetFont(m_testFont);

    // dc.SetBackgroundMode(wxTRANSPARENT);

    dc.SetPen(*wxBLACK_PEN);
    dc.SetBrush(*wxLIGHT_GREY_BRUSH);

    dc.DrawRectangle(0, 0, 230, 350);
    dc.DrawLine(0, 0, 229, 349);
    dc.DrawLine(229, 0, 0, 349);
    dc.SetBrush(*wxTRANSPARENT_BRUSH);

    dc.SetBrush(*wxCYAN_BRUSH);
    dc.SetPen(*wxRED_PEN);

    dc.DrawRoundedRectangle(0, 20, 200, 80, 20);

    dc.DrawText( wxT("Rectangle 200 by 80"), 40, 40);

    dc.SetPen( wxPen(*wxBLACK, 0, wxPENSTYLE_DOT_DASH) );
    dc.DrawEllipse(50, 140, 100, 50);
    dc.SetPen(*wxRED_PEN);

    dc.DrawText( wxT("Test message: this is in 10 point text"), 10, 180);

#if wxUSE_UNICODE
    const char *test = "Hebrew    שלום -- Japanese (日本語)";
    wxString tmp = wxConvUTF8.cMB2WC( test );
    dc.DrawText( tmp, 10, 200 );
#endif

    wxPoint points[5];
    points[0].x = 0;
    points[0].y = 0;
    points[1].x = 20;
    points[1].y = 0;
    points[2].x = 20;
    points[2].y = 20;
    points[3].x = 10;
    points[3].y = 20;
    points[4].x = 10;
    points[4].y = -20;
    dc.DrawPolygon( 5, points, 20, 250, wxODDEVEN_RULE );
    dc.DrawPolygon( 5, points, 50, 250, wxWINDING_RULE );

    dc.DrawEllipticArc( 80, 250, 60, 30, 0.0, 270.0 );

    points[0].x = 150;
    points[0].y = 250;
    points[1].x = 180;
    points[1].y = 250;
    points[2].x = 180;
    points[2].y = 220;
    points[3].x = 200;
    points[3].y = 220;
    dc.DrawSpline( 4, points );

    dc.DrawArc( 20,10, 10,10, 25,40 );

    wxString str;
    int i = 0;
    str.Printf( wxT("---- Text at angle %d ----"), i );
    dc.DrawRotatedText( str, 100, 300, i );

    i = m_angle;
    str.Printf( wxT("---- Text at angle %d ----"), i );
    dc.DrawRotatedText( str, 100, 300, i );

    wxIcon my_icon = wxICON(sample);

    dc.DrawIcon( my_icon, 100, 100);

    if (m_bitmap.IsOk())
        dc.DrawBitmap( m_bitmap, 10, 10 );

#if wxUSE_GRAPHICS_CONTEXT
    wxGraphicsContext *gc = NULL;

    wxPrinterDC *printer_dc = wxDynamicCast( &dc, wxPrinterDC );
    if (printer_dc)
        gc = wxGraphicsContext::Create( *printer_dc );

    wxWindowDC *window_dc = wxDynamicCast( &dc, wxWindowDC );
    if (window_dc)
        gc = wxGraphicsContext::Create( *window_dc );

#ifdef __WXMSW__
    wxEnhMetaFileDC *emf_dc = wxDynamicCast( &dc, wxEnhMetaFileDC );
    if (emf_dc)
        gc = wxGraphicsContext::Create( *emf_dc );
#endif

//.........这里部分代码省略.........

//.........这里部分代码省略.........
            // no effect in msw ??
            dc.SetTextBackground (wxT("WHEAT"));
            dc.DrawText(wxT("This is a Red string"), 50, 200);
            dc.DrawRotatedText(wxT("This is a 45 deg string"), 50, 200, 45);
            dc.DrawRotatedText(wxT("This is a 90 deg string"), 50, 200, 90);
            wF = wxFont ( 18, wxROMAN, wxITALIC, wxBOLD, false, wxT("Times New Roman"));
            dc.SetFont(wF);
            dc.SetTextForeground (wC);
            dc.DrawText(wxT("This is a Times-style string"), 50, 60);
#if wxUSE_STATUSBAR
            s = wxT("Swiss, Times text; red text, rotated and colored orange");
#endif // wxUSE_STATUSBAR
            break;

        case 3 :
            // four arcs start and end points, center
            dc.SetBrush(*wxGREEN_BRUSH);
            dc.DrawArc ( 200,300, 370,230, 300,300 );
            dc.SetBrush(*wxBLUE_BRUSH);
            dc.DrawArc ( 270-50, 270-86, 270-86, 270-50, 270,270 );
            dc.SetDeviceOrigin(-10,-10);
            dc.DrawArc ( 270-50, 270-86, 270-86, 270-50, 270,270 );
            dc.SetDeviceOrigin(0,0);

            wP.SetColour (wxT("CADET BLUE"));
            dc.SetPen(wP);
            dc.DrawArc ( 75,125, 110, 40, 75, 75 );

            wP.SetColour (wxT("SALMON"));
            dc.SetPen(wP);
            dc.SetBrush(*wxRED_BRUSH);
            //top left corner, width and height, start and end angle
                                 // 315 same center and x-radius as last pie-arc, half Y radius
            dc.DrawEllipticArc(25,50,100,50,180.0,45.0);

            wP = *wxCYAN_PEN;
            wP.SetWidth(3);
            dc.SetPen(wP);
                                 //wxTRANSPARENT));
            dc.SetBrush (wxBrush (wxT("SALMON")));
            dc.DrawEllipticArc(300,  0,200,100, 0.0,145.0);
                                 //same end point
            dc.DrawEllipticArc(300, 50,200,100,90.0,145.0);
            dc.DrawEllipticArc(300,100,200,100,90.0,345.0);

#if wxUSE_STATUSBAR
            s = wxT("This is an arc test page");
#endif // wxUSE_STATUSBAR
            break;

        case 4:
            dc.DrawCheckMark ( 30,30,25,25);
            dc.SetBrush (wxBrush (wxT("SALMON"),wxBRUSHSTYLE_TRANSPARENT));
            dc.DrawCheckMark ( 80,50,75,75);
            dc.DrawRectangle ( 80,50,75,75);
#if wxUSE_STATUSBAR
            s = wxT("Two check marks");
#endif // wxUSE_STATUSBAR
            break;

        case 5:
            wF = wxFont ( 18, wxROMAN, wxITALIC, wxBOLD, false, wxT("Times New Roman"));
            dc.SetFont(wF);
            dc.DrawLine(0, 0, 200, 200);
            dc.DrawLine(200, 0, 0, 200);
            dc.DrawText(wxT("This is an 18pt string"), 50, 60);

void MyFrame::Draw(wxDC& dc)
{
    // This routine just draws a bunch of random stuff on the screen so that we
    // can check that different types of object are being drawn consistently
    // between the screen image, the print preview image (at various zoom
    // levels), and the printed page.
    dc.SetBackground(*wxWHITE_BRUSH);
    dc.Clear();
    dc.SetFont(wxGetApp().m_testFont);

    dc.SetBackgroundMode(wxTRANSPARENT);

    dc.SetPen(*wxBLACK_PEN);
    dc.SetBrush(*wxLIGHT_GREY_BRUSH);
//    dc.SetBackground(*wxWHITE_BRUSH);
    dc.DrawRectangle(0, 0, 230, 350);
    dc.DrawLine(0, 0, 229, 349);
    dc.DrawLine(229, 0, 0, 349);
    dc.SetBrush(*wxTRANSPARENT_BRUSH);

    dc.SetBrush(*wxCYAN_BRUSH);
    dc.SetPen(*wxRED_PEN);

    dc.DrawRoundedRectangle(0, 20, 200, 80, 20);

    dc.DrawText( wxT("Rectangle 200 by 80"), 40, 40);

    dc.SetPen( wxPen(*wxBLACK,0,wxDOT_DASH) );
    dc.DrawEllipse(50, 140, 100, 50);
    dc.SetPen(*wxRED_PEN);

    dc.DrawText( wxT("Test message: this is in 10 point text"), 10, 180);
    
#if wxUSE_UNICODE
    //char *test = "Hebrew    שלום -- Japanese (日本語)";
    //wxString tmp = wxConvUTF8.cMB2WC( test );
    //dc.DrawText( tmp, 10, 200 );
#endif

    wxPoint points[5];
    points[0].x = 0;
    points[0].y = 0;
    points[1].x = 20;
    points[1].y = 0;
    points[2].x = 20;
    points[2].y = 20;
    points[3].x = 10;
    points[3].y = 20;
    points[4].x = 10;
    points[4].y = -20;
    dc.DrawPolygon( 5, points, 20, 250, wxODDEVEN_RULE );
    dc.DrawPolygon( 5, points, 50, 250, wxWINDING_RULE );

    dc.DrawEllipticArc( 80, 250, 60, 30, 0.0, 270.0 );

    points[0].x = 150;
    points[0].y = 250;
    points[1].x = 180;
    points[1].y = 250;
    points[2].x = 180;
    points[2].y = 220;
    points[3].x = 200;
    points[3].y = 220;
    dc.DrawSpline( 4, points );

    dc.DrawArc( 20,10, 10,10, 25,40 );
        
    wxString str;
    int i = 0;
    str.Printf( wxT("---- Text at angle %d ----"), i );
    dc.DrawRotatedText( str, 100, 300, i );

    i = m_angle;
    str.Printf( wxT("---- Text at angle %d ----"), i );
    dc.DrawRotatedText( str, 100, 300, i );

    wxIcon my_icon = wxICON(mondrian) ;

    dc.DrawIcon( my_icon, 100, 100);

    if (m_bitmap.Ok())
    {
      dc.DrawBitmap(m_bitmap, 10, 25);
    }
    if (m_imgUp.Ok())
    {
      dc.DrawBitmap(m_imgUp, 300, 200);
      dc.DrawBitmap(m_imgUp, 300, 250, true);
    }
}

//.........这里部分代码省略.........
            // no effect in msw ??
            dc.SetTextBackground (_T("WHEAT"));
            dc.DrawText(wxT("This is a Red string"), 50, 200);
            dc.DrawRotatedText(wxT("This is a 45 deg string"), 50, 200, 45);
            dc.DrawRotatedText(wxT("This is a 90 deg string"), 50, 200, 90);
            wF = wxFont ( 18, wxROMAN, wxITALIC, wxBOLD, false, wxT("Times New Roman"));
            dc.SetFont(wF);
            dc.SetTextForeground (wC) ;
            dc.DrawText(wxT("This is a Times-style string"), 50, 60);
#if wxUSE_STATUSBAR
            s = wxT("Swiss, Times text; red text, rotated and colored orange");
#endif // wxUSE_STATUSBAR
            break ;

        case 3 :
            // four arcs start and end points, center
            dc.SetBrush(*wxGREEN_BRUSH);
            dc.DrawArc ( 200,300, 370,230, 300,300 );
            dc.SetBrush(*wxBLUE_BRUSH);
            dc.DrawArc ( 270-50, 270-86, 270-86, 270-50, 270,270 );
            dc.SetDeviceOrigin(-10,-10);
            dc.DrawArc ( 270-50, 270-86, 270-86, 270-50, 270,270 );
            dc.SetDeviceOrigin(0,0);

            wP.SetColour (_T("CADET BLUE"));
            dc.SetPen(wP);
            dc.DrawArc ( 75,125, 110, 40, 75, 75 );

            wP.SetColour (_T("SALMON"));
            dc.SetPen(wP);
            dc.SetBrush(*wxRED_BRUSH);
            //top left corner, width and height, start and end angle
                                 // 315 same center and x-radius as last pie-arc, half Y radius
            dc.DrawEllipticArc(25,50,100,50,180.0,45.0) ;

            wP = *wxCYAN_PEN ;
            wP.SetWidth(3);
            dc.SetPen(wP);
                                 //wxTRANSPARENT));
            dc.SetBrush (wxBrush (_T("SALMON"),wxSOLID)) ;
            dc.DrawEllipticArc(300,  0,200,100, 0.0,145.0) ;
                                 //same end point
            dc.DrawEllipticArc(300, 50,200,100,90.0,145.0) ;
            dc.DrawEllipticArc(300,100,200,100,90.0,345.0) ;

#if wxUSE_STATUSBAR
            s = wxT("This is an arc test page");
#endif // wxUSE_STATUSBAR
            break ;

        case 4:
            dc.DrawCheckMark ( 30,30,25,25);
            dc.SetBrush (wxBrush (_T("SALMON"),wxTRANSPARENT));
            dc.DrawCheckMark ( 80,50,75,75);
            dc.DrawRectangle ( 80,50,75,75);
#if wxUSE_STATUSBAR
            s = wxT("Two check marks");
#endif // wxUSE_STATUSBAR
            break ;

        case 5:
            wF = wxFont ( 18, wxROMAN, wxITALIC, wxBOLD, false, wxT("Times New Roman"));
            dc.SetFont(wF);
            dc.DrawLine(0, 0, 200, 200);
            dc.DrawLine(200, 0, 0, 200);
            dc.DrawText(wxT("This is an 18pt string"), 50, 60);