wxWidgets/include/wx/html/htmlcell.h
2003-01-02 23:38:11 +00:00

383 lines
14 KiB
C++

/////////////////////////////////////////////////////////////////////////////
// Name: htmlcell.h
// Purpose: wxHtmlCell class is used by wxHtmlWindow/wxHtmlWinParser
// as a basic visual element of HTML page
// Author: Vaclav Slavik
// RCS-ID: $Id$
// Copyright: (c) 1999 Vaclav Slavik
// Licence: wxWindows Licence
/////////////////////////////////////////////////////////////////////////////
#ifndef _WX_HTMLCELL_H_
#define _WX_HTMLCELL_H_
#if defined(__GNUG__) && !defined(__APPLE__)
#pragma interface "htmlcell.h"
#endif
#include "wx/defs.h"
#if wxUSE_HTML
#include "wx/html/htmltag.h"
#include "wx/html/htmldefs.h"
#include "wx/window.h"
class WXDLLEXPORT wxHtmlLinkInfo;
class WXDLLEXPORT wxHtmlCell;
class WXDLLEXPORT wxHtmlContainerCell;
//--------------------------------------------------------------------------------
// wxHtmlCell
// Internal data structure. It represents fragments of parsed HTML
// page - a word, picture, table, horizontal line and so on.
// It is used by wxHtmlWindow to represent HTML page in memory.
//--------------------------------------------------------------------------------
class WXDLLEXPORT wxHtmlCell : public wxObject
{
public:
wxHtmlCell();
virtual ~wxHtmlCell();
void SetParent(wxHtmlContainerCell *p) {m_Parent = p;}
wxHtmlContainerCell *GetParent() const {return m_Parent;}
int GetPosX() const {return m_PosX;}
int GetPosY() const {return m_PosY;}
int GetWidth() const {return m_Width;}
int GetHeight() const {return m_Height;}
int GetDescent() const {return m_Descent;}
const wxString& GetId() const { return m_id; }
void SetId(const wxString& id) { m_id = id; }
// returns the link associated with this cell. The position is position within
// the cell so it varies from 0 to m_Width, from 0 to m_Height
virtual wxHtmlLinkInfo* GetLink(int WXUNUSED(x) = 0, int WXUNUSED(y) = 0) const
{ return m_Link; }
// members access methods
wxHtmlCell *GetNext() const {return m_Next;}
// members writing methods
virtual void SetPos(int x, int y) {m_PosX = x, m_PosY = y;}
void SetLink(const wxHtmlLinkInfo& link);
void SetNext(wxHtmlCell *cell) {m_Next = cell;}
// 1. adjust cell's width according to the fact that maximal possible width is w.
// (this has sense when working with horizontal lines, tables etc.)
// 2. prepare layout (=fill-in m_PosX, m_PosY (and sometime m_Height) members)
// = place items to fit window, according to the width w
virtual void Layout(int w);
// renders the cell
virtual void Draw(wxDC& WXUNUSED(dc), int WXUNUSED(x), int WXUNUSED(y), int WXUNUSED(view_y1), int WXUNUSED(view_y2)) {}
// proceed drawing actions in case the cell is not visible (scrolled out of screen).
// This is needed to change fonts, colors and so on
virtual void DrawInvisible(wxDC& WXUNUSED(dc), int WXUNUSED(x), int WXUNUSED(y)) {}
// This method returns pointer to the FIRST cell for that
// the condition
// is true. It first checks if the condition is true for this
// cell and then calls m_Next->Find(). (Note: it checks
// all subcells if the cell is container)
// Condition is unique condition identifier (see htmldefs.h)
// (user-defined condition IDs should start from 10000)
// and param is optional parameter
// Example : m_Cell->Find(wxHTML_COND_ISANCHOR, "news");
// returns pointer to anchor news
virtual const wxHtmlCell* Find(int condition, const void* param) const;
// This function is called when mouse button is clicked over the cell.
//
// Parent is pointer to wxHtmlWindow that generated the event
// HINT: if this handling is not enough for you you should use
// wxHtmlWidgetCell
virtual void OnMouseClick(wxWindow *parent, int x, int y, const wxMouseEvent& event);
// This method used to adjust pagebreak position. The parameter is
// variable that contains y-coordinate of 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 moves the pagebreak
// few pixels up.
//
// Returned value : true if pagebreak was modified, false otherwise
// Usage : while (container->AdjustPagebreak(&p)) {}
virtual bool AdjustPagebreak(int *pagebreak) const;
// Sets cell's behaviour on pagebreaks (see AdjustPagebreak). Default
// is true - the cell can be split on two pages
void SetCanLiveOnPagebreak(bool can) { m_CanLiveOnPagebreak = can; }
// Returns y-coordinates that contraint the cell, i.e. left is highest
// and right lowest coordinate such that the cell lays between then.
// Note: this method does not return meaningful values if you haven't
// called Layout() before!
virtual void GetHorizontalConstraints(int *left, int *right) const;
// Returns true for simple == terminal cells, i.e. not composite ones.
// This if for internal usage only and may disappear in future versions!
virtual bool IsTerminalCell() const { return TRUE; }
// Find the terminal cell inside this cell at the given position (relative
// to this cell)
//
// Returns NULL if not found
virtual wxHtmlCell *FindCellByPos(wxCoord x, wxCoord y) const;
protected:
wxHtmlCell *m_Next;
// pointer to the next cell
wxHtmlContainerCell *m_Parent;
// pointer to parent cell
long m_Width, m_Height, m_Descent;
// dimensions of fragment
// m_Descent is used to position text&images..
long m_PosX, m_PosY;
// position where the fragment is drawn
wxHtmlLinkInfo *m_Link;
// destination address if this fragment is hypertext link, NULL otherwise
bool m_CanLiveOnPagebreak;
// true if this cell can be placed on pagebreak, false otherwise
wxString m_id;
// unique identifier of the cell, generated from "id" property of tags
DECLARE_NO_COPY_CLASS(wxHtmlCell)
};
//--------------------------------------------------------------------------------
// Inherited cells:
//--------------------------------------------------------------------------------
//--------------------------------------------------------------------------------
// wxHtmlWordCell
// Single word in input stream.
//--------------------------------------------------------------------------------
class WXDLLEXPORT wxHtmlWordCell : public wxHtmlCell
{
public:
wxHtmlWordCell(const wxString& word, wxDC& dc);
void Draw(wxDC& dc, int x, int y, int view_y1, int view_y2);
protected:
wxString m_Word;
};
//--------------------------------------------------------------------------------
// wxHtmlContainerCell
// Container - it contains other cells. Basic of layout algorithm.
//--------------------------------------------------------------------------------
class WXDLLEXPORT wxHtmlContainerCell : public wxHtmlCell
{
public:
wxHtmlContainerCell(wxHtmlContainerCell *parent);
~wxHtmlContainerCell();
virtual void Layout(int w);
virtual void Draw(wxDC& dc, int x, int y, int view_y1, int view_y2);
virtual void DrawInvisible(wxDC& dc, int x, int y);
virtual bool AdjustPagebreak(int *pagebreak) const;
// insert cell at the end of m_Cells list
void InsertCell(wxHtmlCell *cell);
// sets horizontal/vertical alignment
void SetAlignHor(int al) {m_AlignHor = al; m_LastLayout = -1;}
int GetAlignHor() const {return m_AlignHor;}
void SetAlignVer(int al) {m_AlignVer = al; m_LastLayout = -1;}
int GetAlignVer() const {return m_AlignVer;}
// sets left-border indentation. units is one of wxHTML_UNITS_* constants
// what is combination of wxHTML_INDENT_*
void SetIndent(int i, int what, int units = wxHTML_UNITS_PIXELS);
// returns the indentation. ind is one of wxHTML_INDENT_* constants
int GetIndent(int ind) const;
// returns type of value returned by GetIndent(ind)
int GetIndentUnits(int ind) const;
// sets alignment info based on given tag's params
void SetAlign(const wxHtmlTag& tag);
// sets floating width adjustment
// (examples : 32 percent of parent container,
// -15 pixels percent (this means 100 % - 15 pixels)
void SetWidthFloat(int w, int units) {m_WidthFloat = w; m_WidthFloatUnits = units; m_LastLayout = -1;}
void SetWidthFloat(const wxHtmlTag& tag, double pixel_scale = 1.0);
// sets minimal height of this container.
void SetMinHeight(int h, int align = wxHTML_ALIGN_TOP) {m_MinHeight = h; m_MinHeightAlign = align; m_LastLayout = -1;}
void SetBackgroundColour(const wxColour& clr) {m_UseBkColour = TRUE; m_BkColour = clr;}
// returns background colour (of wxNullColour if none set), so that widgets can
// adapt to it:
wxColour GetBackgroundColour();
void SetBorder(const wxColour& clr1, const wxColour& clr2) {m_UseBorder = TRUE; m_BorderColour1 = clr1, m_BorderColour2 = clr2;}
virtual wxHtmlLinkInfo* GetLink(int x = 0, int y = 0) const;
virtual const wxHtmlCell* Find(int condition, const void* param) const;
virtual void OnMouseClick(wxWindow *parent, int x, int y, const wxMouseEvent& event);
virtual void GetHorizontalConstraints(int *left, int *right) const;
// returns pointer to the first cell in container or NULL
wxHtmlCell* GetFirstCell() const {return m_Cells;}
// see comment in wxHtmlCell about this method
virtual bool IsTerminalCell() const { return FALSE; }
virtual wxHtmlCell *FindCellByPos(wxCoord x, wxCoord y) const;
protected:
int m_IndentLeft, m_IndentRight, m_IndentTop, m_IndentBottom;
// indentation of subcells. There is always m_Indent pixels
// big space between given border of the container and the subcells
// it m_Indent < 0 it is in PERCENTS, otherwise it is in pixels
int m_MinHeight, m_MinHeightAlign;
// minimal height.
wxHtmlCell *m_Cells, *m_LastCell;
// internal cells, m_Cells points to the first of them, m_LastCell to the last one.
// (LastCell is needed only to speed-up InsertCell)
int m_AlignHor, m_AlignVer;
// alignment horizontal and vertical (left, center, right)
int m_WidthFloat, m_WidthFloatUnits;
// width float is used in adjustWidth
bool m_UseBkColour;
wxColour m_BkColour;
// background color of this container
bool m_UseBorder;
wxColour m_BorderColour1, m_BorderColour2;
// borders color of this container
int m_LastLayout;
// if != -1 then call to Layout may be no-op
// if previous call to Layout has same argument
DECLARE_NO_COPY_CLASS(wxHtmlContainerCell)
};
//--------------------------------------------------------------------------------
// wxHtmlColourCell
// Color changer.
//--------------------------------------------------------------------------------
class WXDLLEXPORT wxHtmlColourCell : public wxHtmlCell
{
public:
wxHtmlColourCell(const wxColour& clr, int flags = wxHTML_CLR_FOREGROUND) : wxHtmlCell() {m_Colour = clr; m_Flags = flags;}
virtual void Draw(wxDC& dc, int x, int y, int view_y1, int view_y2);
virtual void DrawInvisible(wxDC& dc, int x, int y);
protected:
wxColour m_Colour;
unsigned m_Flags;
};
//--------------------------------------------------------------------------------
// wxHtmlFontCell
// Sets actual font used for text rendering
//--------------------------------------------------------------------------------
class WXDLLEXPORT wxHtmlFontCell : public wxHtmlCell
{
public:
wxHtmlFontCell(wxFont *font) : wxHtmlCell() { m_Font = (*font); }
virtual void Draw(wxDC& dc, int x, int y, int view_y1, int view_y2);
virtual void DrawInvisible(wxDC& dc, int x, int y);
protected:
wxFont m_Font;
};
//--------------------------------------------------------------------------------
// wxHtmlwidgetCell
// This cell is connected with wxWindow object
// You can use it to insert windows into HTML page
// (buttons, input boxes etc.)
//--------------------------------------------------------------------------------
class WXDLLEXPORT wxHtmlWidgetCell : public wxHtmlCell
{
public:
// !!! wnd must have correct parent!
// if w != 0 then the m_Wnd has 'floating' width - it adjust
// it's width according to parent container's width
// (w is percent of parent's width)
wxHtmlWidgetCell(wxWindow *wnd, int w = 0);
~wxHtmlWidgetCell() { m_Wnd->Destroy(); }
virtual void Draw(wxDC& dc, int x, int y, int view_y1, int view_y2);
virtual void DrawInvisible(wxDC& dc, int x, int y);
virtual void Layout(int w);
protected:
wxWindow* m_Wnd;
int m_WidthFloat;
// width float is used in adjustWidth (it is in percents)
DECLARE_NO_COPY_CLASS(wxHtmlWidgetCell)
};
//--------------------------------------------------------------------------------
// wxHtmlLinkInfo
// Internal data structure. It represents hypertext link
//--------------------------------------------------------------------------------
class WXDLLEXPORT wxHtmlLinkInfo : public wxObject
{
public:
wxHtmlLinkInfo() : wxObject()
{ m_Href = m_Target = wxEmptyString; m_Event = NULL, m_Cell = NULL; }
wxHtmlLinkInfo(const wxString& href, const wxString& target = wxEmptyString) : wxObject()
{ m_Href = href; m_Target = target; m_Event = NULL, m_Cell = NULL; }
wxHtmlLinkInfo(const wxHtmlLinkInfo& l) : wxObject()
{ m_Href = l.m_Href, m_Target = l.m_Target, m_Event = l.m_Event;
m_Cell = l.m_Cell; }
wxHtmlLinkInfo& operator=(const wxHtmlLinkInfo& l)
{ m_Href = l.m_Href, m_Target = l.m_Target, m_Event = l.m_Event;
m_Cell = l.m_Cell; return *this; }
void SetEvent(const wxMouseEvent *e) { m_Event = e; }
void SetHtmlCell(const wxHtmlCell *e) { m_Cell = e; }
wxString GetHref() const { return m_Href; }
wxString GetTarget() const { return m_Target; }
const wxMouseEvent* GetEvent() const { return m_Event; }
const wxHtmlCell* GetHtmlCell() const { return m_Cell; }
private:
wxString m_Href, m_Target;
const wxMouseEvent *m_Event;
const wxHtmlCell *m_Cell;
};
#endif // wxUSE_HTML
#endif // _WX_HTMLCELL_H_