\section{\class{wxRendererNative}}\label{wxrenderernative}
-First, a brief introduction into what is wxRenderer and why is it needed.
+First, a brief introduction to wxRenderer and why it is needed.
-Usually wxWindows uses the underlying low level GUI system to draw all the
-controls -- this is what we mean when we say that it is a ``native'' framework.
+Usually wxWidgets uses the underlying low level GUI system to draw all the
+controls - this is what we mean when we say that it is a ``native'' framework.
However not all controls exist under all (or even any) platforms and in this
-case wxWindows provides a default, generic, implementation of them written in
-wxWindows itself.
+case wxWidgets provides a default, generic, implementation of them written in
+wxWidgets itself.
-These controls however don't have the native appearance if only the standard
-line drawing and other graphics primitives are used if only because the native
+These controls don't have the native appearance if only the standard
+line drawing and other graphics primitives are used, because the native
appearance is different under different platforms while the lines are always
drawn in the same way.
This is why we have renderers: wxRenderer is a class which virtualizes the
-drawing, i.e. it abstracts the drawing operations and allows you to draw a,
-say, button, without caring about how exactly this is done. Of course, as we
+drawing, i.e. it abstracts the drawing operations and allows you to draw say, a
+button, without caring about exactly how this is done. Of course, as we
can draw the button differently in different renderers, this also allows us to
emulate the native look and feel.
-
-So the renderers work by exposing a big set of high-level drawing functions
+So the renderers work by exposing a large set of high-level drawing functions
which are used by the generic controls. There is always a default global
renderer but it may be changed or extended by the user, see
\helpref{Render sample}{samplerender}.
All drawing functions take some standard parameters:
\begin{itemize}
- \item \arg{win} is the window being drawn. it is normally not used and when
- it is it should only be used as a generic \helpref{wxWindow}{wxwindow}
- (in order to get its low level handle, for example), but you should
- \emph{not} assume that it is of some given type as the same renderer
- function may be reused for drawing different kinds of control.
- \item \arg{dc} is the \helpref{wxDC}{wxdc} to draw on, only this device
- context should be used for drawing. It is not necessary to restore
- pens and brushes for it on function exit but, on the other hand, you
- shouldn't assume that it is in any specific state on function entry
- neither: the rendering functions should always prepare it.
- \item \arg{rect} the bounding rectangle for the element to be drawn
- \item \arg{flags} the optional flags (none by default) which can be a
- combination of the \texttt{wxCONTROL\_XXX} constants below
+\item \arg{win} is the window being drawn. It is normally not used and when
+it is it should only be used as a generic \helpref{wxWindow}{wxwindow}
+(in order to get its low level handle, for example), but you should
+\emph{not} assume that it is of some given type as the same renderer
+function may be reused for drawing different kinds of control.
+\item \arg{dc} is the \helpref{wxDC}{wxdc} to draw on. Only this device
+context should be used for drawing. It is not necessary to restore
+pens and brushes for it on function exit but, on the other hand, you
+shouldn't assume that it is in any specific state on function entry:
+the rendering functions should always prepare it.
+\item \arg{rect} the bounding rectangle for the element to be drawn.
+\item \arg{flags} the optional flags (none by default) which can be a
+combination of the \texttt{wxCONTROL\_XXX} constants below.
\end{itemize}
+Note that each drawing function restores the \helpref{wxDC}{wxdc} attributes if
+it changes them, so it is safe to assume that the same pen, brush and colours
+that were active before the call to this function are still in effect after it.
+
+
\wxheading{Constants}
The following rendering flags are defined:
+
\begin{verbatim}
enum
{
wxCONTROL_DISABLED = 0x00000001, // control is disabled
wxCONTROL_FOCUSED = 0x00000002, // currently has keyboard focus
wxCONTROL_PRESSED = 0x00000004, // (button) is pressed
- wxCONTROL_ISDEFAULT = 0x00000008, // only applies to the buttons
- wxCONTROL_ISSUBMENU = wxCONTROL_ISDEFAULT, // only for menu items
- wxCONTROL_EXPANDED = wxCONTROL_ISDEFAULT, // only for the tree items
+ wxCONTROL_SPECIAL = 0x00000008, // control-specific bit:
+ wxCONTROL_ISDEFAULT = wxCONTROL_SPECIAL, // only for the buttons
+ wxCONTROL_ISSUBMENU = wxCONTROL_SPECIAL, // only for the menu items
+ wxCONTROL_EXPANDED = wxCONTROL_SPECIAL, // only for the tree items
+ wxCONTROL_SIZEGRIP = wxCONTROL_SPECIAL, // only for the status bar panes
+ wxCONTROL_FLAT = wxCONTROL_SPECIAL, // checkboxes only: flat border
wxCONTROL_CURRENT = 0x00000010, // mouse is currently over the control
wxCONTROL_SELECTED = 0x00000020, // selected item in e.g. listbox
wxCONTROL_CHECKED = 0x00000040, // (check/radio button) is checked
- wxCONTROL_CHECKABLE = 0x00000080 // (menu) item can be checked
+ wxCONTROL_CHECKABLE = 0x00000080, // (menu) item can be checked
+ wxCONTROL_UNDETERMINED = wxCONTROL_CHECKABLE // (check) undetermined state
};
\end{verbatim}
-
\wxheading{Derived from}
No base class
<wx/renderer.h>
+\wxheading{Library}
+
+\helpref{wxCore}{librarieslist}
+
\latexignore{\rtfignore{\wxheading{Members}}}
Virtual destructor as for any base class.
+\membersection{wxRendererNative::DrawCheckBox}\label{wxrenderernativedrawcheckbox}
+
+\func{void}{DrawCheckBox}{\param{wxWindow *}{win}, \param{wxDC\& }{dc}, \param{const wxRect\& }{rect}, \param{int }{flags}}
+
+Draw a check box (used by wxDataViewCtrl).
+
+\arg{flags} may have the \texttt{wxCONTROL\_CHECKED}, \texttt{wxCONTROL\_CURRENT} or
+\texttt{wxCONTROL\_UNDETERMINED} bit set.
+
+
+\membersection{wxRendererNative::DrawComboBoxDropButton}\label{wxrenderernativedrawcomboboxdropbutton}
+
+\func{void}{DrawComboBoxDropButton}{\param{wxWindow *}{win}, \param{wxDC\& }{dc}, \param{const wxRect\& }{rect}, \param{int }{flags}}
+
+Draw a button like the one used by \helpref{wxComboBox}{wxcombobox} to show a
+drop down window. The usual appearance is a downwards pointing arrow.
+
+\arg{flags} may have the \texttt{wxCONTROL\_PRESSED} or \texttt{wxCONTROL\_CURRENT} bit set.
+
+
+\membersection{wxRendererNative::DrawDropArrow}\label{wxrenderernativedrawdroparrow}
+
+\func{void}{DrawDropArrow}{\param{wxWindow *}{win}, \param{wxDC\& }{dc}, \param{const wxRect\& }{rect}, \param{int }{flags}}
+
+Draw a drop down arrow that is suitable for use outside a combo box. Arrow will have
+transparent background.
+
+\arg{rect} is not entirely filled by the arrow. Instead, you should use bounding
+rectangle of a drop down button which arrow matches the size you need.
+\arg{flags} may have the \texttt{wxCONTROL\_PRESSED} or \texttt{wxCONTROL\_CURRENT} bit set.
+
+
+\membersection{wxRendererNative::DrawFocusRect}\label{wxrenderernativedrawfocusrect}
+
+\func{void}{DrawFocusRect}{\param{wxWindow* }{win}, \param{wxDC\& }{dc}, \param{const wxRect\& }{rect}, \param{int }{flags = 0}}
+
+Draw a focus rectangle using the specified rectangle.
+\helpref{wxListCtrl}{wxlistctrl}. The only supported flags is
+\texttt{wxCONTROL\_SELECTED} for items which are selected.
+
+
\membersection{wxRendererNative::DrawHeaderButton}\label{wxrenderernativedrawheaderbutton}
-\func{void}{DrawHeaderButton}{\param{wxWindow* }{win}, \param{wxDC\& }{dc}, \param{const wxRect\& }{rect}, \param{int }{flags = 0}}
+\func{int}{DrawHeaderButton}{\param{wxWindow* }{win}, \param{wxDC\& }{dc}, \param{const wxRect\& }{rect}, \param{int }{flags = 0}, \param{wxHeaderSortIconType }{sortArrow = wxHDR\_SORT\_ICON\_NONE}, \param{wxHeaderButtonParams* }{params = NULL}}
+
+Draw the header control button (used, for example, by
+\helpref{wxListCtrl}{wxlistctrl}). Depending on platforms the
+\arg{flags} parameter may support the \texttt{wxCONTROL\_SELECTED}
+\texttt{wxCONTROL\_DISABLED} and \texttt{wxCONTROL\_CURRENT} bits.
+The \arg{sortArrow} parameter can be one of
+\texttt{wxHDR\_SORT\_ICON\_NONE}, \texttt{wxHDR\_SORT\_ICON\_UP}, or
+\texttt{wxHDR\_SORT\_ICON\_DOWN}. Additional values controlling the
+drawing of a text or bitmap label can be passed in \arg{params}. The
+value returned is the optimal width to contain the the unabreviated
+label text or bitmap, the sort arrow if present, and internal margins.
+
+
+
+\membersection{wxRendererNative::DrawItemSelectionRect}\label{wxrenderernativedrawitemselectionrect}
-Draw the header control button (used by \helpref{wxListCtrl}{wxlistctrl}).
+\func{void}{DrawItemSelectionRect}{\param{wxWindow* }{win}, \param{wxDC\& }{dc}, \param{const wxRect\& }{rect}, \param{int }{flags = 0}}
+
+Draw a selection rectangle underneath the text as used e.g. in a
+\helpref{wxListCtrl}{wxlistctrl}. The supported \arg{flags} are
+\texttt{wxCONTROL\_SELECTED} for items which are selected (e.g. often a blue
+rectangle) and \texttt{wxCONTROL\_CURRENT} for the item that has the focus
+(often a dotted line around the item's text). \texttt{wxCONTROL\_FOCUSED} may
+be used to indicate if the control has the focus (othewise the the selection
+rectangle is e.g. often grey and not blue). This may be ignored by the renderer
+or deduced by the code directly from the \arg{win}.
+
+
+\membersection{wxRendererNative::DrawPushButton}\label{wxrenderernativedrawpushbutton}
+
+\func{void}{DrawPushButton}{\param{wxWindow *}{win}, \param{wxDC\& }{dc}, \param{const wxRect\& }{rect}, \param{int }{flags}}
+
+Draw a blank push button that looks very similar to \helpref{wxButton}{wxbutton}.
+
+\arg{flags} may have the \texttt{wxCONTROL\_PRESSED}, \texttt{wxCONTROL\_CURRENT} or
+\texttt{wxCONTROL\_ISDEFAULT} bit set.
\membersection{wxRendererNative::DrawSplitterBorder}\label{wxrenderernativedrawsplitterborder}
\func{void}{DrawSplitterSash}{\param{wxWindow* }{win}, \param{wxDC\& }{dc}, \param{const wxSize\& }{size}, \param{wxCoord }{position}, \param{wxOrientation }{orient}, \param{int }{flags = 0}}
Draw a sash. The \arg{orient} parameter defines whether the sash should be
-vertical or horizontal and how should the \arg{position} be interpreted.
+vertical or horizontal and how the \arg{position} should be interpreted.
\membersection{wxRendererNative::DrawTreeItemButton}\label{wxrenderernativedrawtreeitembutton}
renderer which can be retrieved by calling \helpref{GetDefault}{wxrenderernativegetdefault}.
+\membersection{wxRendererNative::GetHeaderButtonHeight}\label{wxrenderernativegetheaderbuttonheight}
+
+\func{int}{GetHeaderButtonHeight}{\param{const wxWindow* }{win}}
+
+Returns the height of a header button, either a fixed platform height if available, or a
+generic height based on the window's font.
+
+
\membersection{wxRendererNative::GetSplitterParams}\label{wxrenderernativegetsplitterparams}
\func{wxSplitterRenderParams}{GetSplitterParams}{\param{const wxWindow* }{win}}
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