X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/0c589ad076cb531a3ef7808aaedadc03c8286942..594f0f5bf1355fb8d58f403d3ebacc1c1767c429:/src/common/dcbase.cpp diff --git a/src/common/dcbase.cpp b/src/common/dcbase.cpp index 114771cbb9..958d45969b 100644 --- a/src/common/dcbase.cpp +++ b/src/common/dcbase.cpp @@ -1,33 +1,73 @@ ///////////////////////////////////////////////////////////////////////////// -// Name: dc.cpp -// Purpose: wxDC Class -// Author: Brian Macy +// Name: common/dcbase.cpp +// Purpose: generic methods of the wxDC Class +// Author: Vadim Zeitlin // Modified by: // Created: 05/25/99 // RCS-ID: $Id$ -// Copyright: (c) Julian Smart and Markus Holzem -// Licence: wxWindows license +// Copyright: (c) wxWindows team +// Licence: wxWindows license ///////////////////////////////////////////////////////////////////////////// +// ============================================================================ +// declarations +// ============================================================================ + #ifdef __GNUG__ -#pragma implementation "dcbase.h" + #pragma implementation "dcbase.h" #endif +// ---------------------------------------------------------------------------- +// headers +// ---------------------------------------------------------------------------- + // For compilers that support precompilation, includes "wx.h". #include "wx/wxprec.h" #ifdef __BORLANDC__ -#pragma hdrstop -#endif - -#ifndef WX_PRECOMP - #include "wx/window.h" - #include "wx/msw/private.h" + #pragma hdrstop #endif #include "wx/dc.h" -void wxDCBase::DrawLines(const wxList *list, long xoffset, long yoffset) +#include + +// bool wxDCBase::sm_cacheing = FALSE; + +// ============================================================================ +// implementation +// ============================================================================ + +// ---------------------------------------------------------------------------- +// special symbols +// ---------------------------------------------------------------------------- + +void wxDCBase::DoDrawCheckMark(wxCoord x1, wxCoord y1, + wxCoord width, wxCoord height) +{ + wxCHECK_RET( Ok(), wxT("invalid window dc") ); + + wxCoord x2 = x1 + width, + y2 = y1 + height; + + // this is to yield width of 3 for width == height == 10 + SetPen(wxPen(GetTextForeground(), (width + height + 1) / 7, wxSOLID)); + + // we're drawing a scaled version of wx/generic/tick.xpm here + wxCoord x3 = x1 + (4*width) / 10, // x of the tick bottom + y3 = y1 + height / 2; // y of the left tick branch + DoDrawLine(x1, y3, x3, y2); + DoDrawLine(x3, y2, x2, y1); + + CalcBoundingBox(x1, y1); + CalcBoundingBox(x2, y2); +} + +// ---------------------------------------------------------------------------- +// line/polygons +// ---------------------------------------------------------------------------- + +void wxDCBase::DrawLines(const wxList *list, wxCoord xoffset, wxCoord yoffset) { int n = list->Number(); wxPoint *points = new wxPoint[n]; @@ -47,7 +87,7 @@ void wxDCBase::DrawLines(const wxList *list, long xoffset, long yoffset) void wxDCBase::DrawPolygon(const wxList *list, - long xoffset, long yoffset, + wxCoord xoffset, wxCoord yoffset, int fillStyle) { int n = list->Number(); @@ -66,11 +106,14 @@ void wxDCBase::DrawPolygon(const wxList *list, delete [] points; } +// ---------------------------------------------------------------------------- +// splines +// ---------------------------------------------------------------------------- #if wxUSE_SPLINES // TODO: this API needs fixing (wxPointList, why (!const) "wxList *"?) -void wxDCBase::DrawSpline(long x1, long y1, long x2, long y2, long x3, long y3) +void wxDCBase::DrawSpline(wxCoord x1, wxCoord y1, wxCoord x2, wxCoord y2, wxCoord x3, wxCoord y3) { wxList point_list; @@ -106,4 +149,398 @@ void wxDCBase::DrawSpline(int n, wxPoint points[]) DrawSpline(&list); } +// ----------------------------------- spline code ---------------------------------------- + +void wx_quadratic_spline(double a1, double b1, double a2, double b2, + double a3, double b3, double a4, double b4); +void wx_clear_stack(); +int wx_spline_pop(double *x1, double *y1, double *x2, double *y2, double *x3, + double *y3, double *x4, double *y4); +void wx_spline_push(double x1, double y1, double x2, double y2, double x3, double y3, + double x4, double y4); +static bool wx_spline_add_point(double x, double y); +static void wx_spline_draw_point_array(wxDCBase *dc); + +wxList wx_spline_point_list; + +#define half(z1, z2) ((z1+z2)/2.0) +#define THRESHOLD 5 + +/* iterative version */ + +void wx_quadratic_spline(double a1, double b1, double a2, double b2, double a3, double b3, double a4, + double b4) +{ + register double xmid, ymid; + double x1, y1, x2, y2, x3, y3, x4, y4; + + wx_clear_stack(); + wx_spline_push(a1, b1, a2, b2, a3, b3, a4, b4); + + while (wx_spline_pop(&x1, &y1, &x2, &y2, &x3, &y3, &x4, &y4)) { + xmid = (double)half(x2, x3); + ymid = (double)half(y2, y3); + if (fabs(x1 - xmid) < THRESHOLD && fabs(y1 - ymid) < THRESHOLD && + fabs(xmid - x4) < THRESHOLD && fabs(ymid - y4) < THRESHOLD) { + wx_spline_add_point( x1, y1 ); + wx_spline_add_point( xmid, ymid ); + } else { + wx_spline_push(xmid, ymid, (double)half(xmid, x3), (double)half(ymid, y3), + (double)half(x3, x4), (double)half(y3, y4), x4, y4); + wx_spline_push(x1, y1, (double)half(x1, x2), (double)half(y1, y2), + (double)half(x2, xmid), (double)half(y2, ymid), xmid, ymid); + } + } +} + +/* utilities used by spline drawing routines */ + +typedef struct wx_spline_stack_struct { + double x1, y1, x2, y2, x3, y3, x4, y4; +} Stack; + +#define SPLINE_STACK_DEPTH 20 +static Stack wx_spline_stack[SPLINE_STACK_DEPTH]; +static Stack *wx_stack_top; +static int wx_stack_count; + +void wx_clear_stack() +{ + wx_stack_top = wx_spline_stack; + wx_stack_count = 0; +} + +void wx_spline_push(double x1, double y1, double x2, double y2, double x3, double y3, double x4, double y4) +{ + wx_stack_top->x1 = x1; + wx_stack_top->y1 = y1; + wx_stack_top->x2 = x2; + wx_stack_top->y2 = y2; + wx_stack_top->x3 = x3; + wx_stack_top->y3 = y3; + wx_stack_top->x4 = x4; + wx_stack_top->y4 = y4; + wx_stack_top++; + wx_stack_count++; +} + +int wx_spline_pop(double *x1, double *y1, double *x2, double *y2, + double *x3, double *y3, double *x4, double *y4) +{ + if (wx_stack_count == 0) + return (0); + wx_stack_top--; + wx_stack_count--; + *x1 = wx_stack_top->x1; + *y1 = wx_stack_top->y1; + *x2 = wx_stack_top->x2; + *y2 = wx_stack_top->y2; + *x3 = wx_stack_top->x3; + *y3 = wx_stack_top->y3; + *x4 = wx_stack_top->x4; + *y4 = wx_stack_top->y4; + return (1); +} + +static bool wx_spline_add_point(double x, double y) +{ + wxPoint *point = new wxPoint ; + point->x = (int) x; + point->y = (int) y; + wx_spline_point_list.Append((wxObject*)point); + return TRUE; +} + +static void wx_spline_draw_point_array(wxDCBase *dc) +{ + dc->DrawLines(&wx_spline_point_list, 0, 0 ); + wxNode *node = wx_spline_point_list.First(); + while (node) + { + wxPoint *point = (wxPoint *)node->Data(); + delete point; + delete node; + node = wx_spline_point_list.First(); + } +} + +void wxDCBase::DoDrawSpline( wxList *points ) +{ + wxCHECK_RET( Ok(), wxT("invalid window dc") ); + + wxPoint *p; + double cx1, cy1, cx2, cy2, cx3, cy3, cx4, cy4; + double x1, y1, x2, y2; + + wxNode *node = points->First(); + p = (wxPoint *)node->Data(); + + x1 = p->x; + y1 = p->y; + + node = node->Next(); + p = (wxPoint *)node->Data(); + + x2 = p->x; + y2 = p->y; + cx1 = (double)((x1 + x2) / 2); + cy1 = (double)((y1 + y2) / 2); + cx2 = (double)((cx1 + x2) / 2); + cy2 = (double)((cy1 + y2) / 2); + + wx_spline_add_point(x1, y1); + + while ((node = node->Next()) != NULL) + { + p = (wxPoint *)node->Data(); + x1 = x2; + y1 = y2; + x2 = p->x; + y2 = p->y; + cx4 = (double)(x1 + x2) / 2; + cy4 = (double)(y1 + y2) / 2; + cx3 = (double)(x1 + cx4) / 2; + cy3 = (double)(y1 + cy4) / 2; + + wx_quadratic_spline(cx1, cy1, cx2, cy2, cx3, cy3, cx4, cy4); + + cx1 = cx4; + cy1 = cy4; + cx2 = (double)(cx1 + x2) / 2; + cy2 = (double)(cy1 + y2) / 2; + } + + wx_spline_add_point( cx1, cy1 ); + wx_spline_add_point( x2, y2 ); + + wx_spline_draw_point_array( this ); +} + #endif // wxUSE_SPLINES + +// ---------------------------------------------------------------------------- +// enhanced text drawing +// ---------------------------------------------------------------------------- + +void wxDCBase::GetMultiLineTextExtent(const wxString& text, + wxCoord *x, + wxCoord *y, + wxCoord *h, + wxFont *font) +{ + int widthTextMax = 0, widthLine, + heightTextTotal = 0, heightLineDefault = 0, heightLine = 0; + + wxString curLine; + for ( const wxChar *pc = text; ; pc++ ) + { + if ( *pc == _T('\n') || *pc == _T('\0') ) + { + if ( curLine.empty() ) + { + // we can't use GetTextExtent - it will return 0 for both width + // and height and an empty line should count in height + // calculation + + // assume that this line has the same height as the previous + // one + if ( !heightLineDefault ) + heightLineDefault = heightLine; + + if ( !heightLineDefault ) + { + // but we don't know it yet - choose something reasonable + GetTextExtent(_T("W"), NULL, &heightLineDefault, + NULL, NULL, font); + } + + heightTextTotal += heightLineDefault; + } + else + { + GetTextExtent(curLine, &widthLine, &heightLine, + NULL, NULL, font); + if ( widthLine > widthTextMax ) + widthTextMax = widthLine; + heightTextTotal += heightLine; + } + + if ( *pc == _T('\n') ) + { + curLine.clear(); + } + else + { + // the end of string + break; + } + } + else + { + curLine += *pc; + } + } + + if ( x ) + *x = widthTextMax; + if ( y ) + *y = heightTextTotal; + if ( h ) + *h = heightLine; +} + +void wxDCBase::DrawLabel(const wxString& text, + const wxBitmap& bitmap, + const wxRect& rect, + int alignment, + int indexAccel, + wxRect *rectBounding) +{ + // find the text position + wxCoord widthText, heightText, heightLine; + GetMultiLineTextExtent(text, &widthText, &heightText, &heightLine); + + wxCoord width, height; + if ( bitmap.Ok() ) + { + width = widthText + bitmap.GetWidth(); + height = bitmap.GetHeight(); + } + else // no bitmap + { + width = widthText; + height = heightText; + } + + wxCoord x, y; + if ( alignment & wxALIGN_RIGHT ) + { + x = rect.GetRight() - width; + } + else if ( alignment & wxALIGN_CENTRE_HORIZONTAL ) + { + x = (rect.GetLeft() + rect.GetRight() + 1 - width) / 2; + } + else // alignment & wxALIGN_LEFT + { + x = rect.GetLeft(); + } + + if ( alignment & wxALIGN_BOTTOM ) + { + y = rect.GetBottom() - height; + } + else if ( alignment & wxALIGN_CENTRE_VERTICAL ) + { + y = (rect.GetTop() + rect.GetBottom() + 1 - height) / 2; + } + else // alignment & wxALIGN_TOP + { + y = rect.GetTop(); + } + + // draw the bitmap first + wxCoord x0 = x, + y0 = y, + width0 = width; + if ( bitmap.Ok() ) + { + DrawBitmap(bitmap, x, y, TRUE /* use mask */); + + wxCoord offset = bitmap.GetWidth() + 4; + x += offset; + width -= offset; + + y += (height - heightText) / 2; + } + + // we will draw the underscore under the accel char later + wxCoord startUnderscore = 0, + endUnderscore = 0, + yUnderscore = 0; + + // split the string into lines and draw each of them separately + wxString curLine; + for ( const wxChar *pc = text; ; pc++ ) + { + if ( *pc == _T('\n') || *pc == _T('\0') ) + { + int xRealStart = x; // init it here to avoid compielr warnings + + if ( !curLine.empty() ) + { + // NB: can't test for !(alignment & wxALIGN_LEFT) because + // wxALIGN_LEFT is 0 + if ( alignment & (wxALIGN_RIGHT | wxALIGN_CENTRE_HORIZONTAL) ) + { + wxCoord widthLine; + GetTextExtent(curLine, &widthLine, NULL); + + if ( alignment & wxALIGN_RIGHT ) + { + xRealStart += width - widthLine; + } + else // if ( alignment & wxALIGN_CENTRE_HORIZONTAL ) + { + xRealStart += (width - widthLine) / 2; + } + } + //else: left aligned, nothing to do + + DrawText(curLine, xRealStart, y); + } + + y += heightLine; + + // do we have underscore in this line? we can check yUnderscore + // because it is set below to just y + heightLine if we do + if ( y == yUnderscore ) + { + // adjust the horz positions to account for the shift + startUnderscore += xRealStart; + endUnderscore += xRealStart; + } + + if ( *pc == _T('\0') ) + break; + + curLine.clear(); + } + else // not end of line + { + if ( pc - text.c_str() == indexAccel ) + { + // remeber to draw underscore here + GetTextExtent(curLine, &startUnderscore, NULL); + curLine += *pc; + GetTextExtent(curLine, &endUnderscore, NULL); + + yUnderscore = y + heightLine; + } + else + { + curLine += *pc; + } + } + } + + // draw the underscore if found + if ( startUnderscore != endUnderscore ) + { + // it should be of the same colour as text + SetPen(wxPen(GetTextForeground(), 0, wxSOLID)); + + yUnderscore--; + + DrawLine(startUnderscore, yUnderscore, endUnderscore, yUnderscore); + } + + // return bounding rect if requested + if ( rectBounding ) + { + *rectBounding = wxRect(x, y - heightText, widthText, heightText); + } + + CalcBoundingBox(x0, y0); + CalcBoundingBox(x0 + width0, y0 + height); +}