#include </home/zeitlin/src/wx/github/interface/wx/html/htmlcell.h>

Inheritance diagram for wxHtmlCell:

Detailed Description

Internal data structure.

It represents fragments of parsed HTML page, the so-called cell - a word, picture, table, horizontal line and so on. It is used by wxHtmlWindow and wxHtmlWinParser to represent HTML page in memory.

You can divide cells into two groups : visible cells with non-zero width and height and helper cells (usually with zero width and height) that perform special actions such as color or font change.

Library: wxHTML

Category: HTML

参照:: Cells and Containers, wxHtmlContainerCell

Public Member Functions
	wxHtmlCell ()
	Constructor.
virtual bool	AdjustPagebreak (int *pagebreak, const wxArrayInt &known_pagebreaks, int pageHeight) const
	This method is used to adjust pagebreak position.
virtual void	Draw (wxDC &dc, int x, int y, int view_y1, int view_y2, wxHtmlRenderingInfo &info)
	Renders the cell.
virtual void	DrawInvisible (wxDC &dc, int x, int y, wxHtmlRenderingInfo &info)
	This method is called instead of Draw() when the cell is certainly out of the screen (and thus invisible).
virtual const wxHtmlCell *	Find (int condition, const void *param) const
	Returns pointer to itself if this cell matches condition (or if any of the cells following in the list matches), NULL otherwise.
int	GetDescent () const
	Returns descent value of the cell (m_Descent member).
virtual wxHtmlCell *	GetFirstChild () const
	Returns pointer to the first cell in the list.
int	GetHeight () const
	Returns height of the cell (m_Height member).
const wxString &	GetId () const
	Returns unique cell identifier if there is any, the empty string otherwise.
virtual wxHtmlLinkInfo *	GetLink (int x=0, int y=0) const
	Returns hypertext link if associated with this cell or NULL otherwise.
virtual wxCursor	GetMouseCursor (wxHtmlWindowInterface *window) const
	Returns cursor to show when mouse pointer is over the cell.
wxHtmlCell *	GetNext () const
	Returns pointer to the next cell in list (see htmlcell.h if you're interested in details).
wxHtmlContainerCell *	GetParent () const
	Returns pointer to parent container.
int	GetPosX () const
	Returns X position within parent (the value is relative to parent's upper left corner).
int	GetPosY () const
	Returns Y position within parent (the value is relative to parent's upper left corner).
int	GetWidth () const
	Returns width of the cell (m_Width member).
virtual void	Layout (int w)
	Layouts the cell.
virtual bool	ProcessMouseClick (wxHtmlWindowInterface *window, const wxPoint &pos, const wxMouseEvent &event)
	This function is simple event handler.
void	SetId (const wxString &id)
	Sets unique cell identifier.
void	SetLink (const wxHtmlLinkInfo &link)
	Sets the hypertext link associated with this cell.
void	SetNext (wxHtmlCell *cell)
	Sets the next cell in the list.
void	SetParent (wxHtmlContainerCell *p)
	Sets parent container of this cell.
virtual void	SetPos (int x, int y)
	Sets the cell's position within parent container.

List of all members.

Constructor & Destructor Documentation

wxHtmlCell::wxHtmlCell ( )

Constructor.

Member Function Documentation

virtual bool wxHtmlCell::AdjustPagebreak	(	int *	pagebreak,
		const wxArrayInt &	known_pagebreaks,
		int	pageHeight
	)		const `[virtual]`

This method is used to adjust pagebreak position.

The first parameter is a variable that contains the y-coordinate of the page break (= horizontal line that should not be crossed by words, images etc.). If this cell cannot be divided into two pieces (each one on another page) then it either moves the pagebreak a few pixels up, if possible, or, if the cell cannot fit on the page at all, then the cell is forced to split unconditionally.

Returns true if pagebreak was modified, false otherwise.

Parameters:

pagebreak	position in pixel of the pagebreak.
known_pagebreaks	the list of the previous pagebreaks
pageHeight	the height in pixel of the page drawable area

Usage:

        while (container->AdjustPagebreak(&p, kp, ph)) {}

virtual void wxHtmlCell::Draw	(	wxDC &	dc,
		int	x,
		int	y,
		int	view_y1,
		int	view_y2,
		wxHtmlRenderingInfo &	info
	)		`[virtual]`

Renders the cell.

Parameters:

dc	Device context to which the cell is to be drawn.
x,y	Coordinates of parent's upper left corner (origin). You must add this to m_PosX,m_PosY when passing coordinates to dc's methods Example: dc->DrawText("hello", x + m_PosX, y + m_PosY)
view_y1	y-coord of the first line visible in window. This is used to optimize rendering speed.
view_y2	y-coord of the last line visible in window. This is used to optimize rendering speed.
info	Additional information for the rendering of the cell.

virtual void wxHtmlCell::DrawInvisible	(	wxDC &	dc,
		int	x,
		int	y,
		wxHtmlRenderingInfo &	info
	)		`[virtual]`

This method is called instead of Draw() when the cell is certainly out of the screen (and thus invisible).

This is not nonsense - some tags (like wxHtmlColourCell or font setter) must be drawn even if they are invisible!

Parameters:

dc	Device context to which the cell is to be drawn.
x,y	Coordinates of parent's upper left corner. You must add this to m_PosX,m_PosY when passing coordinates to dc's methods Example: dc->DrawText("hello", x + m_PosX, y + m_PosY)
info	Additional information for the rendering of the cell.

virtual const wxHtmlCell* wxHtmlCell::Find	(	int	condition,
		const void *	param
	)		const `[virtual]`

Returns pointer to itself if this cell matches condition (or if any of the cells following in the list matches), NULL otherwise.

(In other words if you call top-level container's Find() it will return pointer to the first cell that matches the condition)

It is recommended way how to obtain pointer to particular cell or to cell of some type (e.g. wxHtmlAnchorCell reacts on wxHTML_COND_ISANCHOR condition).

Parameters:

condition	Unique integer identifier of condition
param	Optional parameters

int wxHtmlCell::GetDescent ( ) const

Returns descent value of the cell (m_Descent member).

See explanation:

virtual wxHtmlCell* wxHtmlCell::GetFirstChild ( ) const [virtual]

Returns pointer to the first cell in the list.

You can then use child's GetNext() method to obtain pointer to the next cell in list.

注:: This shouldn't be used by the end user. If you need some way of finding particular cell in the list, try Find() method instead.

int wxHtmlCell::GetHeight ( ) const

Returns height of the cell (m_Height member).

const wxString& wxHtmlCell::GetId ( ) const

Returns unique cell identifier if there is any, the empty string otherwise.

virtual wxHtmlLinkInfo* wxHtmlCell::GetLink	(	int	x = `0`,
		int	y = `0`
	)		const `[virtual]`

Returns hypertext link if associated with this cell or NULL otherwise.

See wxHtmlLinkInfo. (Note: this makes sense only for visible tags).

Parameters:

x,y	Coordinates of position where the user pressed mouse button. These coordinates are used e.g. by COLORMAP. Values are relative to the upper left corner of THIS cell (i.e. from 0 to m_Width or m_Height)

virtual wxCursor wxHtmlCell::GetMouseCursor ( wxHtmlWindowInterface * window ) const [virtual]

Returns cursor to show when mouse pointer is over the cell.

Parameters:

window interface to the parent HTML window

wxHtmlCell* wxHtmlCell::GetNext ( ) const

Returns pointer to the next cell in list (see htmlcell.h if you're interested in details).

wxHtmlContainerCell* wxHtmlCell::GetParent ( ) const

Returns pointer to parent container.

int wxHtmlCell::GetPosX ( ) const

Returns X position within parent (the value is relative to parent's upper left corner).

The returned value is meaningful only if parent's Layout() was called before!

int wxHtmlCell::GetPosY ( ) const

Returns Y position within parent (the value is relative to parent's upper left corner).

The returned value is meaningful only if parent's Layout() was called before!

int wxHtmlCell::GetWidth ( ) const

Returns width of the cell (m_Width member).

virtual void wxHtmlCell::Layout ( int w ) [virtual]

Layouts the cell.

This method performs two actions:

adjusts the cell's width according to the fact that maximal possible width is w (this has sense when working with horizontal lines, tables etc.)
prepares layout (=fill-in m_PosX, m_PosY (and sometimes m_Height) members) based on actual width w

It must be called before displaying cells structure because m_PosX and m_PosY are undefined (or invalid) before calling Layout().

virtual bool wxHtmlCell::ProcessMouseClick	(	wxHtmlWindowInterface *	window,
		const wxPoint &	pos,
		const wxMouseEvent &	event
	)		`[virtual]`

This function is simple event handler.

Each time the user clicks mouse button over a cell within wxHtmlWindow this method of that cell is called. Default behaviour is to call wxHtmlWindow::LoadPage.

Parameters:

window	interface to the parent HTML window
pos	coordinates of mouse click (this is relative to cell's origin
event	mouse event that triggered the call

Returns:: true if a link was clicked, false otherwise.

Since:: 2.7.0 (before OnMouseClick() method served a similar purpose).

注:: If you need more "advanced" event handling you should use wxHtmlBinderCell instead.

void wxHtmlCell::SetId ( const wxString & id )

Sets unique cell identifier.

Default value is no identifier, i.e. empty string.

void wxHtmlCell::SetLink ( const wxHtmlLinkInfo & link )

Sets the hypertext link associated with this cell.

(Default value is wxHtmlLinkInfo("", "") (no link))

void wxHtmlCell::SetNext ( wxHtmlCell * cell )

Sets the next cell in the list.

This shouldn't be called by user - it is to be used only by wxHtmlContainerCell::InsertCell.

void wxHtmlCell::SetParent ( wxHtmlContainerCell * p )

Sets parent container of this cell.

This is called from wxHtmlContainerCell::InsertCell.

virtual void wxHtmlCell::SetPos	(	int	x,
		int	y
	)		`[virtual]`

Sets the cell's position within parent container.

Detailed Description

Public Member Functions

Constructor & Destructor Documentation

Member Function Documentation