293 lines
12 KiB
C
293 lines
12 KiB
C
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/////////////////////////////////////////////////////////////////////////////
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// Name: htmlcell.h
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// Purpose: wxHtmlCell class is used by wxHtmlWindow/wxHtmlWinParser
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// as a basic visual element of HTML page
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// Author: Vaclav Slavik
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// Copyright: (c) 1999 Vaclav Slavik
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// Licence: wxWindows Licence
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/////////////////////////////////////////////////////////////////////////////
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#ifndef __HTMLCELL_H__
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#define __HTMLCELL_H__
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#ifdef __GNUG__
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#pragma interface
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#endif
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#include "wx/defs.h"
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#if wxUSE_HTML
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#include <wx/html/htmltag.h>
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#include <wx/html/htmldefs.h>
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#include <wx/window.h>
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class wxHtmlCell;
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class wxHtmlContainerCell;
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//--------------------------------------------------------------------------------
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// wxHtmlCell
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// Internal data structure. It represents fragments of parsed HTML
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// page - a word, picture, table, horizontal line and so on.
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// It is used by wxHtmlWindow to represent HTML page in memory.
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//--------------------------------------------------------------------------------
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class WXDLLEXPORT wxHtmlCell : public wxObject
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{
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protected:
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wxHtmlCell *m_Next;
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// pointer to the next cell
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wxHtmlContainerCell *m_Parent;
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// pointer to parent cell
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long m_Width, m_Height, m_Descent;
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// dimensions of fragment
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// m_Descent is used to position text&images..
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long m_PosX, m_PosY;
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// position where the fragment is drawn
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wxString m_Link;
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// destination address if this fragment is hypertext link, "" otherwise
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public:
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wxHtmlCell() : wxObject() {m_Next = NULL; m_Parent = NULL; m_Width = m_Height = m_Descent = 0;};
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virtual ~wxHtmlCell() {if (m_Next) delete m_Next;};
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void SetParent(wxHtmlContainerCell *p) {m_Parent = p;}
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wxHtmlContainerCell *GetParent() const {return m_Parent;}
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int GetPosX() const {return m_PosX;}
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int GetPosY() const {return m_PosY;}
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int GetWidth() const {return m_Width;}
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int GetHeight() const {return m_Height;}
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int GetDescent() const {return m_Descent;}
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virtual wxString GetLink(int x = 0, int y = 0) const {return m_Link;}
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// returns the link associated with this cell. The position is position within
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// the cell so it varies from 0 to m_Width, from 0 to m_Height
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wxHtmlCell *GetNext() const {return m_Next;}
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// members access methods
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virtual void SetPos(int x, int y) {m_PosX = x, m_PosY = y;}
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void SetLink(const wxString& link) {m_Link = link;}
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void SetNext(wxHtmlCell *cell) {m_Next = cell;}
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// members writin methods
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virtual void Layout(int w) {SetPos(0, 0); if (m_Next) m_Next -> Layout(w);};
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// 1. adjust cell's width according to the fact that maximal possible width is w.
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// (this has sense when working with horizontal lines, tables etc.)
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// 2. prepare layout (=fill-in m_PosX, m_PosY (and sometime m_Height) members)
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// = place items to fit window, according to the width w
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virtual void Draw(wxDC& dc, int x, int y, int view_y1, int view_y2) {if (m_Next) m_Next -> Draw(dc, x, y, view_y1, view_y2);}
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// renders the cell
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virtual void DrawInvisible(wxDC& dc, int x, int y) {if (m_Next) m_Next -> DrawInvisible(dc, x, y);};
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// proceed drawing actions in case the cell is not visible (scrolled out of screen).
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// This is needed to change fonts, colors and so on
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virtual const wxHtmlCell* Find(int condition, const void* param) const {if (m_Next) return m_Next -> Find(condition, param); else return NULL;}
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// This method returns pointer to the FIRST cell for that
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// the condition
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// is true. It first checks if the condition is true for this
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// cell and then calls m_Next -> Find(). (Note: it checks
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// all subcells if the cell is container)
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// Condition is unique condition identifier (see htmldefs.h)
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// (user-defined condition IDs should start from 10000)
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// and param is optional parameter
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// Example : m_Cell -> Find(HTML_COND_ISANCHOR, "news");
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// returns pointer to anchor news
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virtual void OnMouseClick(wxWindow *parent, int x, int y, bool left, bool middle, bool right);
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// This function is called when mouse button is clicked over the cell.
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// left, middle, right are flags indicating whether the button was or wasn't
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// pressed.
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// Parent is pointer to wxHtmlWindow that generated the event
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// HINT: if this handling is not enough for you you should use
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// wxHtmlBinderCell
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};
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//--------------------------------------------------------------------------------
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// Inherited cells:
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//--------------------------------------------------------------------------------
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//--------------------------------------------------------------------------------
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// wxHtmlWordCell
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// Single word in input stream.
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//--------------------------------------------------------------------------------
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class WXDLLEXPORT wxHtmlWordCell : public wxHtmlCell
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{
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protected:
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wxString m_Word;
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public:
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wxHtmlWordCell(const wxString& word, wxDC& dc);
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void Draw(wxDC& dc, int x, int y, int view_y1, int view_y2);
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};
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//--------------------------------------------------------------------------------
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// wxHtmlContainerCell
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// Container - it contains other cells. Basic of layout algorithm.
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//--------------------------------------------------------------------------------
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class WXDLLEXPORT wxHtmlContainerCell : public wxHtmlCell
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{
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protected:
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int m_IndentLeft, m_IndentRight, m_IndentTop, m_IndentBottom;
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// indentation of subcells. There is always m_Indent pixels
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// big space between given border of the container and the subcells
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// it m_Indent < 0 it is in PERCENTS, otherwise it is in pixels
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int m_MinHeight, m_MinHeightAlign;
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// minimal height.
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int m_MaxLineWidth;
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// maximal widht of line. Filled during Layout()
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wxHtmlCell *m_Cells, *m_LastCell;
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// internal cells, m_Cells points to the first of them, m_LastCell to the last one.
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// (LastCell is needed only to speed-up InsertCell)
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int m_AlignHor, m_AlignVer;
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// alignment horizontal and vertical (left, center, right)
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int m_WidthFloat, m_WidthFloatUnits;
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// width float is used in adjustWidth
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bool m_UseBkColour;
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wxColour m_BkColour;
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// background color of this container
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bool m_UseBorder;
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wxColour m_BorderColour1, m_BorderColour2;
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// borders color of this container
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public:
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wxHtmlContainerCell(wxHtmlContainerCell *parent);
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~wxHtmlContainerCell() {if (m_Cells) delete m_Cells;}
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virtual void Layout(int w);
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virtual void Draw(wxDC& dc, int x, int y, int view_y1, int view_y2);
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virtual void DrawInvisible(wxDC& dc, int x, int y);
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void InsertCell(wxHtmlCell *cell);
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// insert cell at the end of m_Cells list
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void SetAlignHor(int al) {m_AlignHor = al;}
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int GetAlignHor() const {return m_AlignHor;}
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void SetAlignVer(int al) {m_AlignVer = al;}
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// sets horizontal/vertical alignment
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int GetAlignVer() const {return m_AlignVer;}
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void SetIndent(int i, int what, int units = HTML_UNITS_PIXELS);
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// sets left-border indentation. units is one of HTML_UNITS_* constants
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// what is combination of HTML_INDENT_*
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int GetIndent(int ind) const;
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// returns the indentation. ind is one of HTML_INDENT_* constants
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int GetIndentUnits(int ind) const;
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// returns type of value returned by GetIndent(ind)
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void SetAlign(const wxHtmlTag& tag);
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// sets alignment info based on given tag's params
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void SetWidthFloat(int w, int units) {m_WidthFloat = w; m_WidthFloatUnits = units;}
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void SetWidthFloat(const wxHtmlTag& tag);
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// sets floating width adjustment
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// (examples : 32 percent of parent container,
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// -15 pixels percent (this means 100 % - 15 pixels)
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void SetMinHeight(int h, int align = HTML_ALIGN_TOP) {m_MinHeight = h; m_MinHeightAlign = align;}
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// sets minimal height of this container.
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int GetMaxLineWidth() const {return m_MaxLineWidth;}
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// returns maximal line width in this container.
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// Call to this method is valid only after calling
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// Layout()
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void SetBackgroundColour(const wxColour& clr) {m_UseBkColour = TRUE; m_BkColour = clr;}
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void SetBorder(const wxColour& clr1, const wxColour& clr2) {m_UseBorder = TRUE; m_BorderColour1 = clr1, m_BorderColour2 = clr2;}
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virtual wxString GetLink(int x = 0, int y = 0) const;
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virtual const wxHtmlCell* Find(int condition, const void* param) const;
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virtual void OnMouseClick(wxWindow *parent, int x, int y, bool left, bool middle, bool right);
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wxHtmlCell* GetFirstCell() {return m_Cells;}
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// returns pointer to the first cell in container or NULL
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};
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//--------------------------------------------------------------------------------
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// wxHtmlColourCell
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// Color changer.
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//--------------------------------------------------------------------------------
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class WXDLLEXPORT wxHtmlColourCell : public wxHtmlCell
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{
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public:
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wxColour m_Colour;
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unsigned m_Flags;
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wxHtmlColourCell(wxColour clr, int flags = HTML_CLR_FOREGROUND) : wxHtmlCell() {m_Colour = clr; m_Flags = flags;}
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virtual void Draw(wxDC& dc, int x, int y, int view_y1, int view_y2);
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virtual void DrawInvisible(wxDC& dc, int x, int y);
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};
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//--------------------------------------------------------------------------------
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// wxHtmlFontCell
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// Sets actual font used for text rendering
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//--------------------------------------------------------------------------------
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class WXDLLEXPORT wxHtmlFontCell : public wxHtmlCell
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{
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public:
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wxFont *m_Font;
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wxHtmlFontCell(wxFont *font) : wxHtmlCell() {m_Font = font;};
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virtual void Draw(wxDC& dc, int x, int y, int view_y1, int view_y2);
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virtual void DrawInvisible(wxDC& dc, int x, int y);
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};
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//--------------------------------------------------------------------------------
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// wxHtmlwidgetCell
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// This cell is connected with wxWindow object
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// You can use it to insert windows into HTML page
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// (buttons, input boxes etc.)
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//--------------------------------------------------------------------------------
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class WXDLLEXPORT wxHtmlWidgetCell : public wxHtmlCell
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{
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protected:
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wxWindow* m_Wnd;
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int m_WidthFloat;
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// width float is used in adjustWidth (it is in percents)
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public:
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wxHtmlWidgetCell(wxWindow *wnd, int w = 0);
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// !!! wnd must have correct parent!
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// if w != 0 then the m_Wnd has 'floating' width - it adjust
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// it's width according to parent container's width
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// (w is percent of parent's width)
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virtual void Draw(wxDC& dc, int x, int y, int view_y1, int view_y2);
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virtual void DrawInvisible(wxDC& dc, int x, int y);
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virtual void Layout(int w);
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};
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#endif // __HTMLCELL_H__
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#endif
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