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Version: 3.3.0 |
wxInfoDC Class Reference
#include <wx/dc.h>
Inheritance diagram for wxInfoDC:Detailed Description
Class used for querying the window device context.
This class can be used to retrieve information about the window device context, including its coordinate system and text extents.
Unlike wxPaintDC, objects of this class can be created at any time.
Public Member Functions | |
| wxInfoDC (wxWindow *win) | |
| Create the information device context associated with the given window. More... | |
| Public Member Functions inherited from wxReadOnlyDC | |
| bool | IsOk () const |
| Returns true if the DC is ok to use. More... | |
| double | GetContentScaleFactor () const |
| Returns the factor used for converting logical pixels to physical ones. More... | |
| int | GetDepth () const |
| Returns the depth (number of bits/pixel) of this DC. More... | |
| wxPoint | GetDeviceOrigin () const |
| Returns the current device origin. More... | |
| wxMappingMode | GetMapMode () const |
| Gets the current mapping mode for the device context. More... | |
| wxSize | GetPPI () const |
| Returns the resolution of the device in pixels per inch. More... | |
| wxSize | FromDIP (const wxSize &sz) const |
| Convert DPI-independent pixel values to the value in pixels appropriate for the DC. More... | |
| wxPoint | FromDIP (const wxPoint &pt) const |
| This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts. More... | |
| int | FromDIP (int d) const |
| Convert DPI-independent value in pixels to the value in pixels appropriate for the DC. More... | |
| wxSize | ToDIP (const wxSize &sz) const |
| Convert pixel values of the current DC to DPI-independent pixel values. More... | |
| wxPoint | ToDIP (const wxPoint &pt) const |
| This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts. More... | |
| int | ToDIP (int d) const |
| Convert pixel values of the current DC to DPI-independent pixel values. More... | |
| void | GetSize (wxCoord *width, wxCoord *height) const |
| Gets the horizontal and vertical extent of this device context in device units. More... | |
| wxSize | GetSize () const |
| This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts. More... | |
| void | GetSizeMM (wxCoord *width, wxCoord *height) const |
| Returns the horizontal and vertical resolution in millimetres. More... | |
| wxSize | GetSizeMM () const |
| This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts. More... | |
| void | GetUserScale (double *x, double *y) const |
| Gets the current user scale factor. More... | |
| const wxFont & | GetFont () const |
| Gets the current font. More... | |
| wxLayoutDirection | GetLayoutDirection () const |
| Gets the current layout direction of the device context. More... | |
| void | SetFont (const wxFont &font) |
| Sets the current font for the DC. More... | |
| void | SetLayoutDirection (wxLayoutDirection dir) |
| Sets the current layout direction for the device context. More... | |
| bool | CanDrawBitmap () const |
| Does the DC support drawing bitmaps? More... | |
| bool | CanGetTextExtent () const |
| Does the DC support calculating the size required to draw text? More... | |
| wxCoord | DeviceToLogicalX (wxCoord x) const |
| Convert device X coordinate to logical coordinate, using the current mapping mode, user scale factor, device origin and axis orientation. More... | |
| wxCoord | DeviceToLogicalXRel (wxCoord x) const |
| Convert device X coordinate to relative logical coordinate, using the current mapping mode and user scale factor but ignoring the axis orientation. More... | |
| wxCoord | DeviceToLogicalY (wxCoord y) const |
| Converts device Y coordinate to logical coordinate, using the current mapping mode, user scale factor, device origin and axis orientation. More... | |
| wxCoord | DeviceToLogicalYRel (wxCoord y) const |
| Convert device Y coordinate to relative logical coordinate, using the current mapping mode and user scale factor but ignoring the axis orientation. More... | |
| wxCoord | LogicalToDeviceX (wxCoord x) const |
| Converts logical X coordinate to device coordinate, using the current mapping mode, user scale factor, device origin and axis orientation. More... | |
| wxCoord | LogicalToDeviceXRel (wxCoord x) const |
| Converts logical X coordinate to relative device coordinate, using the current mapping mode and user scale factor but ignoring the axis orientation. More... | |
| wxCoord | LogicalToDeviceY (wxCoord y) const |
| Converts logical Y coordinate to device coordinate, using the current mapping mode, user scale factor, device origin and axis orientation. More... | |
| wxCoord | LogicalToDeviceYRel (wxCoord y) const |
| Converts logical Y coordinate to relative device coordinate, using the current mapping mode and user scale factor but ignoring the axis orientation. More... | |
| wxPoint | DeviceToLogical (wxCoord x, wxCoord y) const |
| Converts device (x, y) coordinates to logical coordinates taking into account all applied transformations like the current mapping mode, scale factors, device origin, axes orientation, affine transformation. More... | |
| wxPoint | DeviceToLogical (const wxPoint &pt) const |
| This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts. More... | |
| wxSize | DeviceToLogicalRel (int x, int y) const |
| Converts device x, y coordinates to relative logical coordinates taking into account all applied transformations like the current mapping mode, scale factors, affine transformation. More... | |
| wxSize | DeviceToLogicalRel (const wxSize &dim) const |
| This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts. More... | |
| wxPoint | LogicalToDevice (wxCoord x, wxCoord y) const |
| Converts logical (x, y) coordinates to device coordinates taking into account all applied transformations like the current mapping mode, scale factors, device origin, axes orientation, affine transformation. More... | |
| wxPoint | LogicalToDevice (const wxPoint &pt) const |
| This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts. More... | |
| wxSize | LogicalToDeviceRel (int x, int y) const |
| Converts logical x, y coordinates to relative device coordinates taking into account all applied transformations like the current mapping mode, scale factors, affine transformation. More... | |
| wxSize | LogicalToDeviceRel (const wxSize &dim) const |
| This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts. More... | |
| void | SetAxisOrientation (bool xLeftRight, bool yBottomUp) |
| Sets the x and y axis orientation (i.e. the direction from lowest to highest values on the axis). More... | |
| void | SetDeviceOrigin (wxCoord x, wxCoord y) |
| Sets the device origin (i.e. the origin in pixels after scaling has been applied). More... | |
| void | SetMapMode (wxMappingMode mode) |
| The mapping mode of the device context defines the unit of measurement used to convert logical units to device units. More... | |
| void | SetUserScale (double xScale, double yScale) |
| Sets the user scaling factor, useful for applications which require 'zooming'. More... | |
| void | SetLogicalScale (double x, double y) |
| Set the scale to use for translating wxDC coordinates to the physical pixels. More... | |
| void | GetLogicalScale (double *x, double *y) const |
| Return the scale set by the last call to SetLogicalScale(). More... | |
| void | SetLogicalOrigin (wxCoord x, wxCoord y) |
| Change the offset used for translating wxDC coordinates. More... | |
| void | GetLogicalOrigin (wxCoord *x, wxCoord *y) const |
| Return the coordinates of the logical point (0, 0). More... | |
| wxPoint | GetLogicalOrigin () const |
| This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts. More... | |
| bool | CanUseTransformMatrix () const |
| Check if the use of transformation matrix is supported by the current system. More... | |
| bool | SetTransformMatrix (const wxAffineMatrix2D &matrix) |
| Set the transformation matrix. More... | |
| wxAffineMatrix2D | GetTransformMatrix () const |
| Return the transformation matrix used by this device context. More... | |
| void | ResetTransformMatrix () |
| Revert the transformation matrix to identity matrix. More... | |
| wxCoord | GetCharHeight () const |
| Gets the character height of the currently set font. More... | |
| wxCoord | GetCharWidth () const |
| Gets the average character width of the currently set font. More... | |
| wxFontMetrics | GetFontMetrics () const |
| Returns the various font characteristics. More... | |
| void | GetMultiLineTextExtent (const wxString &string, wxCoord *w, wxCoord *h, wxCoord *heightLine=nullptr, const wxFont *font=nullptr) const |
| Gets the dimensions of the string using the currently selected font. More... | |
| wxSize | GetMultiLineTextExtent (const wxString &string) const |
| Gets the dimensions of the string using the currently selected font. More... | |
| bool | GetPartialTextExtents (const wxString &text, wxArrayInt &widths) const |
| Fills the widths array with the widths from the beginning of text to the corresponding character of text. More... | |
| void | GetTextExtent (const wxString &string, wxCoord *w, wxCoord *h, wxCoord *descent=nullptr, wxCoord *externalLeading=nullptr, const wxFont *font=nullptr) const |
| Gets the dimensions of the string using the currently selected font. More... | |
| wxSize | GetTextExtent (const wxString &string) const |
| This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts. More... | |
| Public Member Functions inherited from wxObject | |
| wxObject () | |
| Default ctor; initializes to nullptr the internal reference data. More... | |
| wxObject (const wxObject &other) | |
| Copy ctor. More... | |
| virtual | ~wxObject () |
| Destructor. More... | |
| virtual wxClassInfo * | GetClassInfo () const |
| This virtual function is redefined for every class that requires run-time type information, when using the wxDECLARE_CLASS macro (or similar). More... | |
| wxObjectRefData * | GetRefData () const |
| Returns the wxObject::m_refData pointer, i.e. the data referenced by this object. More... | |
| bool | IsKindOf (const wxClassInfo *info) const |
| Determines whether this class is a subclass of (or the same class as) the given class. More... | |
| bool | IsSameAs (const wxObject &obj) const |
| Returns true if this object has the same data pointer as obj. More... | |
| void | Ref (const wxObject &clone) |
| Makes this object refer to the data in clone. More... | |
| void | SetRefData (wxObjectRefData *data) |
| Sets the wxObject::m_refData pointer. More... | |
| void | UnRef () |
| Decrements the reference count in the associated data, and if it is zero, deletes the data. More... | |
| void | UnShare () |
| This is the same of AllocExclusive() but this method is public. More... | |
| void | operator delete (void *buf) |
The delete operator is defined for debugging versions of the library only, when the identifier __WXDEBUG__ is defined. More... | |
| void * | operator new (size_t size, const wxString &filename=nullptr, int lineNum=0) |
The new operator is defined for debugging versions of the library only, when the identifier __WXDEBUG__ is defined. More... | |
Additional Inherited Members | |
| Protected Member Functions inherited from wxObject | |
| void | AllocExclusive () |
| Ensure that this object's data is not shared with any other object. More... | |
| virtual wxObjectRefData * | CreateRefData () const |
| Creates a new instance of the wxObjectRefData-derived class specific to this object and returns it. More... | |
| virtual wxObjectRefData * | CloneRefData (const wxObjectRefData *data) const |
| Creates a new instance of the wxObjectRefData-derived class specific to this object and initializes it copying data. More... | |
| Protected Attributes inherited from wxObject | |
| wxObjectRefData * | m_refData |
| Pointer to an object which is the object's reference-counted data. More... | |
Constructor & Destructor Documentation
◆ wxInfoDC()
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explicit |
Create the information device context associated with the given window.
- Parameters
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win Valid, i.e. non-nullptr, window pointer.