wxHtmlDCRenderer Class Reference

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

Inheritance diagram for wxHtmlDCRenderer:

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Detailed Description

This class can render HTML document into a specified area of a DC.

You can use it in your own printing code, although use of wxHtmlEasyPrinting or wxHtmlPrintout is strongly recommended.

Library:  wxHTML

Category:  HTML

Public Member Functions
	wxHtmlDCRenderer ()
	Constructor.
int	GetTotalWidth () const
	Returns the width of the HTML text in pixels.
int	GetTotalHeight () const
	Returns the height of the HTML text in pixels.
int	Render (int x, int y, wxArrayInt &known_pagebreaks, int from=0, int dont_render=false, int to=INT_MAX)
	Renders HTML text to the DC.
void	SetDC (wxDC *dc, double pixel_scale=1.0)
	Assign DC instance to the renderer.
void	SetFonts (const wxString &normal_face, const wxString &fixed_face, const int *sizes=NULL)
	This function sets font sizes and faces.
void	SetStandardFonts (int size=-1, const wxString &normal_face=wxEmptyString, const wxString &fixed_face=wxEmptyString)
	Sets font sizes to be relative to the given size or the system default size; use either specified or default font.
void	SetHtmlText (const wxString &html, const wxString &basepath=wxEmptyString, bool isdir=true)
	Assign text to the renderer.
void	SetSize (int width, int height)
	Set size of output rectangle, in pixels.

List of all members.

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Constructor & Destructor Documentation

wxHtmlDCRenderer::wxHtmlDCRenderer

(

)

Constructor.

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Member Function Documentation

int wxHtmlDCRenderer::GetTotalHeight

(

)

const

Returns the height of the HTML text in pixels.

This is important if area height (see wxHtmlDCRenderer::SetSize) is smaller that total height and thus the page cannot fit into it. In that case you're supposed to call Render() as long as its return value is smaller than GetTotalHeight()'s.

参照:

GetTotalWidth()

int wxHtmlDCRenderer::GetTotalWidth

(

)

const

Returns the width of the HTML text in pixels.

This can be compared with the width parameter of SetSize() to check if the document being printed fits into the page boundary.

参照:

GetTotalHeight()

Since:

2.9.0

int wxHtmlDCRenderer::Render	(	int	x,
		int	y,
		wxArrayInt &	known_pagebreaks,
		int	from = 0,
		int	dont_render = false,
		int	to = INT_MAX
	)

Renders HTML text to the DC.

Parameters:

x,y	position of upper-left corner of printing rectangle (see SetSize()).
known_pagebreaks

Todo:

docme

Parameters:

from	y-coordinate of the very first visible cell.
dont_render	if true then this method only returns y coordinate of the next page and does not output anything.
to	y-coordinate of the last visible cell.

Returned value is y coordinate of first cell than didn't fit onto page. Use this value as from in next call to Render() in order to print multipages document.

注:

The following three methods must always be called before any call to Render(), in this order:

• SetDC()
• SetSize()
• SetHtmlText()

Render() changes the DC's user scale and does NOT restore it.

void wxHtmlDCRenderer::SetDC	(	wxDC *	dc,
		double	pixel_scale = 1.0
	)

Assign DC instance to the renderer.

pixel_scale can be used when rendering to high-resolution DCs (e.g. printer) to adjust size of pixel metrics. (Many dimensions in HTML are given in pixels -- e.g. image sizes. 300x300 image would be only one inch wide on typical printer. With pixel_scale = 3.0 it would be 3 inches.)

void wxHtmlDCRenderer::SetFonts	(	const wxString &	normal_face,
		const wxString &	fixed_face,
		const int *	sizes = NULL
	)

This function sets font sizes and faces.

Parameters:

normal_face	This is face name for normal (i.e. non-fixed) font. It can be either empty string (then the default face is chosen) or platform-specific face name. Examples are "helvetica" under Unix or "Times New Roman" under Windows.
fixed_face	The same thing for fixed face ( <TT>..</TT> )
sizes	This is an array of 7 items of int type. The values represent size of font with HTML size from -2 to +4 ( <FONT SIZE=-2> to <FONT SIZE=+4> ). Default sizes are used if sizes is NULL.

Default font sizes are defined by constants wxHTML_FONT_SIZE_1, wxHTML_FONT_SIZE_2, ..., wxHTML_FONT_SIZE_7. Note that they differ among platforms. Default face names are empty strings.

参照:

SetSize()

void wxHtmlDCRenderer::SetHtmlText	(	const wxString &	html,
		const wxString &	basepath = wxEmptyString,
		bool	isdir = true
	)

Assign text to the renderer.

Render() then draws the text onto DC.

Parameters:

html	HTML text. This is not a filename.
basepath	base directory (html string would be stored there if it was in file). It is used to determine path for loading images, for example.
isdir	false if basepath is filename, true if it is directory name (see wxFileSystem for detailed explanation).

void wxHtmlDCRenderer::SetSize	(	int	width,
		int	height
	)

Set size of output rectangle, in pixels.

Note that you can't change width of the rectangle between calls to Render() ! (You can freely change height.)

void wxHtmlDCRenderer::SetStandardFonts	(	int	size = -1,
		const wxString &	normal_face = wxEmptyString,
		const wxString &	fixed_face = wxEmptyString
	)

Sets font sizes to be relative to the given size or the system default size; use either specified or default font.

Parameters:

size	Point size of the default HTML text
normal_face	This is face name for normal (i.e. non-fixed) font. It can be either empty string (then the default face is chosen) or platform-specific face name. Examples are "helvetica" under Unix or "Times New Roman" under Windows.
fixed_face	The same thing for fixed face ( <TT>..</TT> )

参照:

SetSize()