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preparing wxHtmlWindow for text selection (highlighting works, mouse input and clipboard does not)

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git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@20786 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
This commit is contained in:
Václav Slavík
2003-05-31 21:42:13 +00:00
parent 13005f1d1e
commit f65a786ffd
2 changed files with 154 additions and 46 deletions
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178
include/wx/html/htmlcell.h
View File

@@ -29,12 +29,89 @@ class WXDLLEXPORT wxHtmlLinkInfo;
class WXDLLEXPORT wxHtmlCell;
class WXDLLEXPORT wxHtmlContainerCell;
//--------------------------------------------------------------------------------
// wxHtmlSelection is data holder with information about text selection.
// Selection is defined by two positions (beginning and end of the selection)
// and two leaf(!) cells at these positions.
class WXDLLEXPORT wxHtmlSelection
{
public:
wxHtmlSelection()
: m_fromPos(wxDefaultPosition), m_toPos(wxDefaultPosition),
m_fromCell(NULL), m_toCell(NULL) {}
void Set(const wxPoint& fromPos, wxHtmlCell *fromCell,
const wxPoint& toPos, wxHtmlCell *toCell)
{
m_fromCell = fromCell;
m_toCell = toCell;
m_fromPos = fromPos;
m_toPos = toPos;
}
wxHtmlCell *GetFromCell() const { return m_fromCell; }
wxHtmlCell *GetToCell() const { return m_toCell; }
// these values are *relative* to From/To cell's origin:
const wxPoint& GetFromPos() const { return m_fromPos; }
const wxPoint& GetToPos() const { return m_toPos; }
const bool IsEmpty() const
{ return m_fromPos == wxDefaultPosition &&
m_toPos == wxDefaultPosition; }
private:
wxPoint m_fromPos, m_toPos;
wxHtmlCell *m_fromCell, *m_toCell;
};
enum wxHtmlSelectionState
{
wxHTML_SEL_OUT, // currently rendered cell is outside the selection
wxHTML_SEL_IN, // ... is inside selection
wxHTML_SEL_CHANGING // ... is the cell on which selection state changes
};
// Selection state is passed to wxHtmlCell::Draw so that it can render itself
// differently e.g. when inside text selection or outside it.
class WXDLLEXPORT wxHtmlRenderingState
{
public:
wxHtmlRenderingState(wxHtmlSelection *s)
: m_selection(s), m_selState(wxHTML_SEL_OUT) {}
wxHtmlSelection *GetSelection() const { return m_selection; }
void SetSelectionState(wxHtmlSelectionState s) { m_selState = s; }
wxHtmlSelectionState GetSelectionState() const { return m_selState; }
void SetFgColour(const wxColour& c) { m_fgColour = c; }
const wxColour& GetFgColour() const { return m_fgColour; }
void SetBgColour(const wxColour& c) { m_bgColour = c; }
const wxColour& GetBgColour() const { return m_bgColour; }
private:
wxHtmlSelection *m_selection;
wxHtmlSelectionState m_selState;
wxColour m_fgColour, m_bgColour;
};
// Flags for wxHtmlCell::FindCellByPos
enum
{
wxHTML_FIND_TERMINAL = 0x0001,
wxHTML_FIND_NONTERMINAL = 0x0002
};
// ---------------------------------------------------------------------------
// 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.
//--------------------------------------------------------------------------------
// 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
@@ -55,8 +132,8 @@ public:
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
// 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; }
@@ -68,18 +145,24 @@ public:
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
// 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)) {}
virtual void Draw(wxDC& WXUNUSED(dc),
int WXUNUSED(x), int WXUNUSED(y),
int WXUNUSED(view_y1), int WXUNUSED(view_y2),
wxHtmlRenderingState& WXUNUSED(state)) {}
// 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)) {}
// 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),
wxHtmlRenderingState& WXUNUSED(state)) {}
// This method returns pointer to the FIRST cell for that
// the condition
@@ -100,15 +183,17 @@ public:
// 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
// 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, int *known_pagebreaks = NULL, int number_of_pages = 0) const;
virtual bool AdjustPagebreak(int *pagebreak,
int *known_pagebreaks = NULL,
int number_of_pages = 0) const;
// Sets cell's behaviour on pagebreaks (see AdjustPagebreak). Default
// is true - the cell can be split on two pages
@@ -124,11 +209,13 @@ public:
// 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;
// Find a cell inside this cell positioned at the given coordinates
// (relative to this's positions). Returns NULL if no such cell exists.
// The flag can be used to specify whether to look for terminal or
// nonterminal cells or both. In either case, returned cell is deepest
// cell in cells tree that contains [x,y].
virtual wxHtmlCell *FindCellByPos(wxCoord x, wxCoord y,
unsigned flags = wxHTML_FIND_TERMINAL) const;
protected:
wxHtmlCell *m_Next;
@@ -167,7 +254,8 @@ 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);
void Draw(wxDC& dc, int x, int y, int view_y1, int view_y2,
wxHtmlRenderingState& state);
protected:
wxString m_Word;
@@ -177,11 +265,8 @@ protected:
//--------------------------------------------------------------------------------
// wxHtmlContainerCell
// Container - it contains other cells. Basic of layout algorithm.
//--------------------------------------------------------------------------------
// Container contains other cells, thus forming tree structure of rendering
// elements. Basic code of layout algorithm is contained in this class.
class WXDLLEXPORT wxHtmlContainerCell : public wxHtmlCell
{
public:
@@ -189,8 +274,10 @@ public:
~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 void Draw(wxDC& dc, int x, int y, int view_y1, int view_y2,
wxHtmlRenderingState& state);
virtual void DrawInvisible(wxDC& dc, int x, int y,
wxHtmlRenderingState& state);
virtual bool AdjustPagebreak(int *pagebreak, int *known_pagebreaks = NULL, int number_of_pages = 0) const;
// insert cell at the end of m_Cells list
@@ -236,8 +323,15 @@ public:
// see comment in wxHtmlCell about this method
virtual bool IsTerminalCell() const { return FALSE; }
virtual wxHtmlCell *FindCellByPos(wxCoord x, wxCoord y) const;
virtual wxHtmlCell *FindCellByPos(wxCoord x, wxCoord y,
unsigned flags = wxHTML_FIND_TERMINAL) const;
protected:
void UpdateRenderingStatePre(wxHtmlRenderingState& state,
wxHtmlCell *cell) const;
void UpdateRenderingStatePost(wxHtmlRenderingState& state,
wxHtmlCell *cell) const;
protected:
int m_IndentLeft, m_IndentRight, m_IndentTop, m_IndentBottom;
// indentation of subcells. There is always m_Indent pixels
@@ -278,8 +372,10 @@ 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);
virtual void Draw(wxDC& dc, int x, int y, int view_y1, int view_y2,
wxHtmlRenderingState& state);
virtual void DrawInvisible(wxDC& dc, int x, int y,
wxHtmlRenderingState& state);
protected:
wxColour m_Colour;
@@ -298,8 +394,10 @@ 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);
virtual void Draw(wxDC& dc, int x, int y, int view_y1, int view_y2,
wxHtmlRenderingState& state);
virtual void DrawInvisible(wxDC& dc, int x, int y,
wxHtmlRenderingState& state);
protected:
wxFont m_Font;
@@ -326,8 +424,10 @@ public:
// (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 Draw(wxDC& dc, int x, int y, int view_y1, int view_y2,
wxHtmlRenderingState& state);
virtual void DrawInvisible(wxDC& dc, int x, int y,
wxHtmlRenderingState& state);
virtual void Layout(int w);
protected:

22
include/wx/html/htmlwin.h
View File

@@ -37,6 +37,10 @@ class wxHtmlProcessorList;
// wxHtmlWindow flags:
#define wxHW_SCROLLBAR_NEVER 0x0002
#define wxHW_SCROLLBAR_AUTO 0x0004
#define wxHW_NO_SELECTION 0x0008
#define wxHW_DEFAULT_STYLE wxHW_SCROLLBAR_AUTO
// enums for wxHtmlWindow::OnOpeningURL
enum wxHtmlOpeningStatus
@@ -46,16 +50,16 @@ enum wxHtmlOpeningStatus
wxHTML_REDIRECT
};
//--------------------------------------------------------------------------------
// ----------------------------------------------------------------------------
// wxHtmlWindow
// (This is probably the only class you will directly use.)
// Purpose of this class is to display HTML page (either local
// file or downloaded via HTTP protocol) in a window. Width
// of window is constant - given in constructor - virtual height
// is changed dynamicly depending on page size.
// Once the window is created you can set it's content by calling
// file or downloaded via HTTP protocol) in a window. Width of
// window is constant - given in constructor - virtual height
// is changed dynamicly depending on page size. Once the
// window is created you can set it's content by calling
// SetPage(text) or LoadPage(filename).
//--------------------------------------------------------------------------------
// ----------------------------------------------------------------------------
class WXDLLEXPORT wxHtmlWindow : public wxScrolledWindow
{
@@ -67,7 +71,7 @@ public:
wxHtmlWindow(wxWindow *parent, wxWindowID id = -1,
const wxPoint& pos = wxDefaultPosition,
const wxSize& size = wxDefaultSize,
long style = wxHW_SCROLLBAR_AUTO,
long style = wxHW_DEFAULT_STYLE,
const wxString& name = wxT("htmlWindow"))
{
Init();
@@ -214,6 +218,10 @@ protected:
// cleans static variables
static void CleanUpStatics();
// Returns true if text selection is enabled (wxClipboard must be available
// and wxHW_NO_SELECTION not used)
bool IsSelectionEnabled() const;
protected:
// This is pointer to the first cell in parsed data.
// (Note: the first cell is usually top one = all other cells are sub-cells of this one)