/////////////////////////////////////////////////////////////////////////////
-// 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: $Id$
// 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"
#pragma hdrstop
#endif
-#ifndef WX_PRECOMP
- #include "wx/window.h"
-#endif
+#include "wx/dc.h"
-#ifdef __WXMSW__
- #include "wx/msw/private.h"
-#endif
+#include <math.h>
-#include "wx/dc.h"
+// bool wxDCBase::sm_cacheing = FALSE;
+
+// ============================================================================
+// implementation
+// ============================================================================
+
+// ----------------------------------------------------------------------------
+// special symbols
+// ----------------------------------------------------------------------------
void wxDCBase::DoDrawCheckMark(wxCoord x1, wxCoord y1,
wxCoord width, wxCoord height)
CalcBoundingBox(x2, y2);
}
+// ----------------------------------------------------------------------------
+// line/polygons
+// ----------------------------------------------------------------------------
+
void wxDCBase::DrawLines(const wxList *list, wxCoord xoffset, wxCoord yoffset)
{
int n = list->Number();
delete [] points;
}
+// ----------------------------------------------------------------------------
+// splines
+// ----------------------------------------------------------------------------
#if wxUSE_SPLINES
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)
+{
+ wxCoord 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);
+}
projects / wxWidgets.git / blobdiff