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support for drawing arbitary object on DC's

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git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@7958 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
This commit is contained in:
Kevin Hock 2000-08-06 05:55:39 +00:00
parent 33fed83514
commit aec4371660
1 changed files with 66 additions and 0 deletions
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66
include/wx/dc.h
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@ -31,6 +31,65 @@
#include "wx/list.h" // we use wxList in inline functions
class WXDLLEXPORT wxDCBase;
class WXDLLEXPORT wxDrawObject
{
public:
wxDrawObject()
{
ResetBoundingBox();
}
virtual ~wxDrawObject() { }
void Draw(const wxDCBase& dc) const { }
virtual void CalcBoundingBox(wxCoord x, wxCoord y)
{
if ( m_isBBoxValid )
{
if ( x < m_minX ) m_minX = x;
if ( y < m_minY ) m_minY = y;
if ( x > m_maxX ) m_maxX = x;
if ( y > m_maxY ) m_maxY = y;
}
else
{
m_isBBoxValid = TRUE;
m_minX = x;
m_minY = y;
m_maxX = x;
m_maxY = y;
}
}
void ResetBoundingBox()
{
m_isBBoxValid = FALSE;
m_minX = m_maxX = m_minY = m_maxY = 0;
}
// Get the final bounding box of the PostScript or Metafile picture.
wxCoord MinX() const { return m_minX; }
wxCoord MaxX() const { return m_maxX; }
wxCoord MinY() const { return m_minY; }
wxCoord MaxY() const { return m_maxY; }
//to define the type of object for derived objects
virtual int GetType()=0;
protected:
//for boundingbox calculation
bool m_isBBoxValid:1;
//for boundingbox calculation
wxCoord m_minX, m_minY, m_maxX, m_maxY;
};
// ---------------------------------------------------------------------------
// global variables
// ---------------------------------------------------------------------------
@ -82,6 +141,13 @@ public:
// graphic primitives
// ------------------
virtual void DrawObject(wxDrawObject* drawobject)
{
drawobject->Draw(*this);
CalcBoundingBox(drawobject->MinX(),drawobject->MinY());
CalcBoundingBox(drawobject->MaxX(),drawobject->MaxY());
}
void FloodFill(wxCoord x, wxCoord y, const wxColour& col,
int style = wxFLOOD_SURFACE)
{ DoFloodFill(x, y, col, style); }