24fd54ed31
This function can be used to check if drawing on wxClientDC actually works. This has to be a run-time, rather than compile-time, check because in wxGTK3 this depends on the backend being used: wxClientDC only doesn't work with Wayland, but does work with X11 (and, less importantly, Win32) backend(s). Currently the wxWindow parameter of this function is not used but it could be useful in the future and it will be simpler to allow not specifying it (by defaulting it to nullptr) than to add it later, so it seems better to have it.
172 lines
6.8 KiB
C++
172 lines
6.8 KiB
C++
/////////////////////////////////////////////////////////////////////////////
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// Name: wx/gtk/dcclient.h
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// Purpose:
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// Author: Robert Roebling
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// Copyright: (c) 1998 Robert Roebling
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// Licence: wxWindows licence
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/////////////////////////////////////////////////////////////////////////////
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#ifndef _WX_GTKDCCLIENT_H_
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#define _WX_GTKDCCLIENT_H_
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#include "wx/gtk/dc.h"
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//-----------------------------------------------------------------------------
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// wxWindowDCImpl
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//-----------------------------------------------------------------------------
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class WXDLLIMPEXP_CORE wxWindowDCImpl : public wxGTKDCImpl
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{
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public:
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wxWindowDCImpl( wxDC *owner );
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wxWindowDCImpl( wxDC *owner, wxWindow *win );
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virtual ~wxWindowDCImpl();
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virtual bool CanDrawBitmap() const override { return true; }
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virtual bool CanGetTextExtent() const override { return true; }
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virtual void DoGetSize(int *width, int *height) const override;
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virtual bool DoFloodFill( wxCoord x, wxCoord y, const wxColour& col,
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wxFloodFillStyle style=wxFLOOD_SURFACE ) override;
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virtual bool DoGetPixel( wxCoord x1, wxCoord y1, wxColour *col ) const override;
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virtual void DoDrawLine( wxCoord x1, wxCoord y1, wxCoord x2, wxCoord y2 ) override;
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virtual void DoCrossHair( wxCoord x, wxCoord y ) override;
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virtual void DoDrawArc( wxCoord x1, wxCoord y1, wxCoord x2, wxCoord y2,
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wxCoord xc, wxCoord yc ) override;
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virtual void DoDrawEllipticArc( wxCoord x, wxCoord y, wxCoord width, wxCoord height,
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double sa, double ea ) override;
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virtual void DoDrawPoint( wxCoord x, wxCoord y ) override;
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virtual void DoDrawLines(int n, const wxPoint points[],
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wxCoord xoffset, wxCoord yoffset) override;
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virtual void DoDrawPolygon(int n, const wxPoint points[],
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wxCoord xoffset, wxCoord yoffset,
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wxPolygonFillMode fillStyle = wxODDEVEN_RULE) override;
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virtual void DoDrawRectangle( wxCoord x, wxCoord y, wxCoord width, wxCoord height ) override;
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virtual void DoDrawRoundedRectangle( wxCoord x, wxCoord y, wxCoord width, wxCoord height, double radius = 20.0 ) override;
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virtual void DoDrawEllipse( wxCoord x, wxCoord y, wxCoord width, wxCoord height ) override;
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virtual void DoDrawIcon( const wxIcon &icon, wxCoord x, wxCoord y ) override;
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virtual void DoDrawBitmap( const wxBitmap &bitmap, wxCoord x, wxCoord y,
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bool useMask = false ) override;
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virtual bool DoBlit( wxCoord xdest, wxCoord ydest,
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wxCoord width, wxCoord height,
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wxDC *source, wxCoord xsrc, wxCoord ysrc,
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wxRasterOperationMode logical_func = wxCOPY,
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bool useMask = false,
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wxCoord xsrcMask = -1, wxCoord ysrcMask = -1 ) override;
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virtual void DoDrawText( const wxString &text, wxCoord x, wxCoord y ) override;
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virtual void DoDrawRotatedText(const wxString& text, wxCoord x, wxCoord y,
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double angle) override;
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virtual void DoGetTextExtent( const wxString &string,
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wxCoord *width, wxCoord *height,
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wxCoord *descent = nullptr,
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wxCoord *externalLeading = nullptr,
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const wxFont *theFont = nullptr) const override;
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virtual bool DoGetPartialTextExtents(const wxString& text, wxArrayInt& widths) const override;
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virtual void DoSetClippingRegion( wxCoord x, wxCoord y, wxCoord width, wxCoord height ) override;
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virtual void DoSetDeviceClippingRegion( const wxRegion ®ion ) override;
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virtual bool DoGetClippingRect(wxRect& rect) const override;
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virtual wxCoord GetCharWidth() const override;
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virtual wxCoord GetCharHeight() const override;
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virtual void Clear() override;
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virtual void SetFont( const wxFont &font ) override;
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virtual void SetPen( const wxPen &pen ) override;
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virtual void SetBrush( const wxBrush &brush ) override;
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virtual void SetBackground( const wxBrush &brush ) override;
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virtual void SetLogicalFunction( wxRasterOperationMode function ) override;
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virtual void SetTextForeground( const wxColour &col ) override;
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virtual void SetTextBackground( const wxColour &col ) override;
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virtual void SetBackgroundMode( int mode ) override;
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#if wxUSE_PALETTE
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virtual void SetPalette( const wxPalette& palette ) override;
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#endif
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virtual void DestroyClippingRegion() override;
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// Resolution in pixels per logical inch
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virtual wxSize GetPPI() const override;
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virtual int GetDepth() const override;
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// overridden here for RTL
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virtual void SetDeviceOrigin( wxCoord x, wxCoord y ) override;
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virtual void SetAxisOrientation( bool xLeftRight, bool yBottomUp ) override;
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// protected:
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// implementation
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// --------------
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GdkWindow *m_gdkwindow;
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GdkGC *m_penGC;
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GdkGC *m_brushGC;
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GdkGC *m_textGC;
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GdkGC *m_bgGC;
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GdkColormap *m_cmap;
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bool m_isScreenDC;
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wxRegion m_currentClippingRegion;
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wxRegion m_paintClippingRegion;
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bool m_isClipBoxValid;
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// PangoContext stuff for GTK 2.0
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PangoContext *m_context;
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PangoLayout *m_layout;
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PangoFontDescription *m_fontdesc;
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void SetUpDC( bool ismem = false );
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void Destroy();
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virtual void ComputeScaleAndOrigin() override;
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virtual GdkWindow *GetGDKWindow() const override { return m_gdkwindow; }
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// Update the internal clip box variables
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void UpdateClipBox();
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private:
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void DrawingSetup(GdkGC*& gc, bool& originChanged);
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GdkPixmap* MonoToColor(GdkPixmap* monoPixmap, int x, int y, int w, int h) const;
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wxDECLARE_ABSTRACT_CLASS(wxWindowDCImpl);
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};
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//-----------------------------------------------------------------------------
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// wxClientDCImpl
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//-----------------------------------------------------------------------------
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class WXDLLIMPEXP_CORE wxClientDCImpl : public wxWindowDCImpl
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{
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public:
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wxClientDCImpl( wxDC *owner );
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wxClientDCImpl( wxDC *owner, wxWindow *win );
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virtual void DoGetSize(int *width, int *height) const override;
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static bool
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CanBeUsedForDrawing(const wxWindow* WXUNUSED(window)) { return true; }
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wxDECLARE_ABSTRACT_CLASS(wxClientDCImpl);
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};
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//-----------------------------------------------------------------------------
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// wxPaintDCImpl
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//-----------------------------------------------------------------------------
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class WXDLLIMPEXP_CORE wxPaintDCImpl : public wxClientDCImpl
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{
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public:
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wxPaintDCImpl( wxDC *owner );
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wxPaintDCImpl( wxDC *owner, wxWindow *win );
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wxDECLARE_ABSTRACT_CLASS(wxPaintDCImpl);
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};
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#endif // _WX_GTKDCCLIENT_H_
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