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simplify coordinate transformation code

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git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@40682 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
This commit is contained in:
Paul Cornett
2006-08-19 21:30:06 +00:00
parent b34497d885
commit 772b376785
5 changed files with 53 additions and 103 deletions
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89
include/wx/gtk/dc.h
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@@ -10,12 +10,6 @@
#ifndef __GTKDCH__
#define __GTKDCH__
//-----------------------------------------------------------------------------
// classes
//-----------------------------------------------------------------------------
class WXDLLIMPEXP_CORE wxDC;
//-----------------------------------------------------------------------------
// constants
//-----------------------------------------------------------------------------
@@ -31,6 +25,43 @@ class WXDLLIMPEXP_CORE wxDC;
#define MM_METRIC 7
#endif
//-----------------------------------------------------------------------------
// coordinates transformations
//-----------------------------------------------------------------------------
inline wxCoord wxDCBase::DeviceToLogicalX(wxCoord x) const
{
return wxRound((x - m_deviceOriginX) / m_scaleX) * m_signX + m_logicalOriginX;
}
inline wxCoord wxDCBase::DeviceToLogicalY(wxCoord y) const
{
return wxRound((y - m_deviceOriginY) / m_scaleY) * m_signY + m_logicalOriginY;
}
inline wxCoord wxDCBase::DeviceToLogicalXRel(wxCoord x) const
{
return wxRound(x / m_scaleX);
}
inline wxCoord wxDCBase::DeviceToLogicalYRel(wxCoord y) const
{
return wxRound(y / m_scaleY);
}
inline wxCoord wxDCBase::LogicalToDeviceX(wxCoord x) const
{
return wxRound((x - m_logicalOriginX) * m_scaleX) * m_signX + m_deviceOriginX;
}
inline wxCoord wxDCBase::LogicalToDeviceY(wxCoord y) const
{
return wxRound((y - m_logicalOriginY) * m_scaleY) * m_signY + m_deviceOriginY;
}
inline wxCoord wxDCBase::LogicalToDeviceXRel(wxCoord x) const
{
return wxRound(x * m_scaleX);
}
inline wxCoord wxDCBase::LogicalToDeviceYRel(wxCoord y) const
{
return wxRound(y * m_scaleY);
}
//-----------------------------------------------------------------------------
// wxDC
//-----------------------------------------------------------------------------
@@ -61,6 +92,7 @@ public:
virtual void SetAxisOrientation( bool xLeftRight, bool yBottomUp );
protected:
// implementation
// --------------
@@ -68,66 +100,37 @@ public:
wxCoord XDEV2LOG(wxCoord x) const
{
wxCoord new_x = x - m_deviceOriginX;
if (new_x > 0)
return (wxCoord)((double)(new_x) / m_scaleX + 0.5) * m_signX + m_logicalOriginX;
else
return (wxCoord)((double)(new_x) / m_scaleX - 0.5) * m_signX + m_logicalOriginX;
return DeviceToLogicalX(x);
}
wxCoord XDEV2LOGREL(wxCoord x) const
{
if (x > 0)
return (wxCoord)((double)(x) / m_scaleX + 0.5);
else
return (wxCoord)((double)(x) / m_scaleX - 0.5);
return DeviceToLogicalXRel(x);
}
wxCoord YDEV2LOG(wxCoord y) const
{
wxCoord new_y = y - m_deviceOriginY;
if (new_y > 0)
return (wxCoord)((double)(new_y) / m_scaleY + 0.5) * m_signY + m_logicalOriginY;
else
return (wxCoord)((double)(new_y) / m_scaleY - 0.5) * m_signY + m_logicalOriginY;
return DeviceToLogicalY(y);
}
wxCoord YDEV2LOGREL(wxCoord y) const
{
if (y > 0)
return (wxCoord)((double)(y) / m_scaleY + 0.5);
else
return (wxCoord)((double)(y) / m_scaleY - 0.5);
return DeviceToLogicalYRel(y);
}
wxCoord XLOG2DEV(wxCoord x) const
{
wxCoord new_x = x - m_logicalOriginX;
if (new_x > 0)
return (wxCoord)((double)(new_x) * m_scaleX + 0.5) * m_signX + m_deviceOriginX;
else
return (wxCoord)((double)(new_x) * m_scaleX - 0.5) * m_signX + m_deviceOriginX;
return LogicalToDeviceX(x);
}
wxCoord XLOG2DEVREL(wxCoord x) const
{
if (x > 0)
return (wxCoord)((double)(x) * m_scaleX + 0.5);
else
return (wxCoord)((double)(x) * m_scaleX - 0.5);
return LogicalToDeviceXRel(x);
}
wxCoord YLOG2DEV(wxCoord y) const
{
wxCoord new_y = y - m_logicalOriginY;
if (new_y > 0)
return (wxCoord)((double)(new_y) * m_scaleY + 0.5) * m_signY + m_deviceOriginY;
else
return (wxCoord)((double)(new_y) * m_scaleY - 0.5) * m_signY + m_deviceOriginY;
return LogicalToDeviceY(y);
}
wxCoord YLOG2DEVREL(wxCoord y) const
{
if (y > 0)
return (wxCoord)((double)(y) * m_scaleY + 0.5);
else
return (wxCoord)((double)(y) * m_scaleY - 0.5);
return LogicalToDeviceYRel(y);
}
protected:
// base class pure virtuals implemented here
virtual void DoSetClippingRegion(wxCoord x, wxCoord y, wxCoord width, wxCoord height);
virtual void DoGetSizeMM(int* width, int* height) const;