Splines sample.
git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@35513 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
This commit is contained in:
Włodzimierz Skiba
@@ -1,5 +1,5 @@
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/////////////////////////////////////////////////////////////////////////////
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// Name: drawing.cpp
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// Name: samples/drawing/drawing.cpp
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// Purpose: shows and tests wxDC features
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// Author: Robert Roebling
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// Modified by:
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@@ -64,7 +64,8 @@ enum ScreenToShow
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Show_Mask,
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Show_Ops,
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Show_Regions,
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Show_Circles
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Show_Circles,
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Show_Splines
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};
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// ----------------------------------------------------------------------------
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@@ -166,6 +167,7 @@ protected:
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void DrawWithLogicalOps(wxDC& dc);
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void DrawRegions(wxDC& dc);
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void DrawCircles(wxDC& dc);
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void DrawSplines(wxDC& dc);
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void DrawDefault(wxDC& dc);
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void DrawRegionsHelper(wxDC& dc, wxCoord x, bool firstTime);
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@@ -189,10 +191,10 @@ private:
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enum
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{
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// menu items
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File_Quit = 1,
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File_About,
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File_Quit = wxID_EXIT,
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File_About = wxID_ABOUT,
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MenuShow_First,
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MenuShow_First = wxID_HIGHEST,
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File_ShowDefault = MenuShow_First,
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File_ShowText,
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File_ShowLines,
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@@ -202,7 +204,8 @@ enum
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File_ShowOps,
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File_ShowRegions,
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File_ShowCircles,
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MenuShow_Last = File_ShowCircles,
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File_ShowSplines,
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MenuShow_Last = File_ShowSplines,
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File_Clip,
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@@ -885,6 +888,94 @@ void MyCanvas::DrawCircles(wxDC& dc)
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dc.DrawEllipticArc(x + 5*r, y, 2*r, r, 270, 360);
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}
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void MyCanvas::DrawSplines(wxDC& dc)
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{
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#if wxUSE_SPLINES
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dc.DrawText(_T("Some splines"), 10, 5);
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// values are hardcoded rather than randomly generated
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// so the output can be compared between native
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// implementations on platforms with different random
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// generators
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const int R = 300;
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const wxPoint center( R + 20, R + 20 );
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const int angles[7] = { 0, 10, 33, 77, 13, 145, 90 };
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const int radii[5] = { 100 , 59, 85, 33, 90 };
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const int n = 200;
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wxPoint pts[n];
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// background spline calculation
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unsigned int radius_pos = 0;
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unsigned int angle_pos = 0;
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int angle = 0;
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for ( int i = 0; i < n; i++ )
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{
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angle += angles[ angle_pos ];
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int r = R * radii[ radius_pos ] / 100;
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pts[ i ].x = center.x + (wxCoord)( r * cos( M_PI * angle / 180.0) );
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pts[ i ].y = center.y + (wxCoord)( r * sin( M_PI * angle / 180.0) );
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angle_pos++;
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if ( angle_pos >= WXSIZEOF(angles) ) angle_pos = 0;
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radius_pos++;
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if ( radius_pos >= WXSIZEOF(radii) ) radius_pos = 0;
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}
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// background spline drawing
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dc.SetPen(*wxRED_PEN);
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dc.DrawSpline(WXSIZEOF(pts), pts);
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// less detailed spline calculation
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wxPoint letters[4][5];
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// w
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letters[0][0] = wxPoint( 0,1); // O O
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letters[0][1] = wxPoint( 1,3); // * *
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letters[0][2] = wxPoint( 2,2); // * O *
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letters[0][3] = wxPoint( 3,3); // * * * *
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letters[0][4] = wxPoint( 4,1); // O O
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// x1
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letters[1][0] = wxPoint( 5,1); // O*O
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letters[1][1] = wxPoint( 6,1); // *
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letters[1][2] = wxPoint( 7,2); // O
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letters[1][3] = wxPoint( 8,3); // *
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letters[1][4] = wxPoint( 9,3); // O*O
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// x2
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letters[2][0] = wxPoint( 5,3); // O*O
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letters[2][1] = wxPoint( 6,3); // *
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letters[2][2] = wxPoint( 7,2); // O
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letters[2][3] = wxPoint( 8,1); // *
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letters[2][4] = wxPoint( 9,1); // O*O
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// W
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letters[3][0] = wxPoint(10,0); // O O
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letters[3][1] = wxPoint(11,3); // * *
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letters[3][2] = wxPoint(12,1); // * O *
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letters[3][3] = wxPoint(13,3); // * * * *
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letters[3][4] = wxPoint(14,0); // O O
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const int dx = 2 * R / letters[3][4].x;
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const int h[4] = { -R/2, 0, R/4, R/2 };
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for ( int m = 0; m < 4; m++ )
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{
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for ( int n = 0; n < 5; n++ )
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{
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letters[m][n].x = center.x - R + letters[m][n].x * dx;
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letters[m][n].y = center.y + h[ letters[m][n].y ];
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}
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dc.SetPen( wxPen( wxT("blue"), 1, wxDOT) );
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dc.DrawLines(5, letters[m]);
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dc.SetPen( wxPen( wxT("black"), 4, wxSOLID) );
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dc.DrawSpline(5, letters[m]);
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}
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#else
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dc.DrawText(_T("Splines not supported."), 10, 5);
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#endif
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}
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void MyCanvas::DrawRegions(wxDC& dc)
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{
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dc.DrawText(_T("You should see a red rect partly covered by a cyan one ")
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@@ -985,6 +1076,10 @@ void MyCanvas::OnPaint(wxPaintEvent &WXUNUSED(event))
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DrawCircles(dc);
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break;
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case Show_Splines:
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DrawSplines(dc);
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break;
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case Show_Regions:
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DrawRegions(dc);
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break;
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@@ -1071,6 +1166,7 @@ MyFrame::MyFrame(const wxString& title, const wxPoint& pos, const wxSize& size)
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menuFile->Append(File_ShowOps, _T("&ROP screen\tF7"));
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menuFile->Append(File_ShowRegions, _T("Re&gions screen\tF8"));
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menuFile->Append(File_ShowCircles, _T("&Circles screen\tF9"));
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menuFile->Append(File_ShowSplines, _T("&Splines screen"));
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menuFile->AppendSeparator();
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menuFile->AppendCheckItem(File_Clip, _T("&Clip\tCtrl-C"), _T("Clip/unclip drawing"));
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menuFile->AppendSeparator();
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@@ -1301,4 +1397,3 @@ wxColour MyFrame::SelectColour()
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return col;
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}
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#endif // wxUSE_COLOURDLG
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