wxWidgets/user/wxLayout/wxlwindow.cpp
Karsten Ballüder 60a040b3bb I was stupid enough to reorganise the way font changes get stored and applied,
so after only four hours work I'm back where I was yesterday. Selections still
buggy.


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@2454 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
1999-05-13 21:13:26 +00:00

772 lines
21 KiB
C++

/*-*- c++ -*-********************************************************
* wxLwindow.h : a scrolled Window for displaying/entering rich text*
* *
* (C) 1998, 1999 by Karsten Ballüder (Ballueder@usa.net) *
* *
* $Id$
*******************************************************************/
#ifdef __GNUG__
# pragma implementation "wxlwindow.h"
#endif
#include "wx/wxprec.h"
#ifdef __BORLANDC__
# pragma hdrstop
#endif
#include "Mpch.h"
#ifdef M_BASEDIR
# ifndef USE_PCH
# include "Mcommon.h"
# include "gui/wxMenuDefs.h"
# include "gui/wxMApp.h"
# endif // USE_PCH
# include "gui/wxlwindow.h"
# include "gui/wxlparser.h"
#else
# ifdef __WXMSW__
# include <windows.h>
# undef FindWindow
# undef GetCharWidth
# undef StartDoc
# endif
# include "wxlwindow.h"
# include "wxlparser.h"
#endif
#include <wx/clipbrd.h>
#include <wx/textctrl.h>
#include <wx/dataobj.h>
#include <ctype.h>
#ifdef WXLAYOUT_DEBUG
# define WXLO_DEBUG(x) wxLogDebug x
#else
# define WXLO_DEBUG(x)
#endif
/// offsets to put a nice frame around text
#define WXLO_XOFFSET 4
#define WXLO_YOFFSET 4
/// offset to the right and bottom for when to redraw scrollbars
#define WXLO_ROFFSET 20
#define WXLO_BOFFSET 20
BEGIN_EVENT_TABLE(wxLayoutWindow,wxScrolledWindow)
EVT_PAINT (wxLayoutWindow::OnPaint)
EVT_CHAR (wxLayoutWindow::OnChar)
EVT_KEY_UP (wxLayoutWindow::OnKeyUp)
EVT_LEFT_DOWN(wxLayoutWindow::OnLeftMouseClick)
EVT_RIGHT_DOWN(wxLayoutWindow::OnRightMouseClick)
EVT_LEFT_DCLICK(wxLayoutWindow::OnMouseDblClick)
EVT_MOTION (wxLayoutWindow::OnMouseMove)
EVT_MENU_RANGE(WXLOWIN_MENU_FIRST, WXLOWIN_MENU_LAST, wxLayoutWindow::OnMenu)
EVT_SET_FOCUS(wxLayoutWindow::OnSetFocus)
EVT_KILL_FOCUS(wxLayoutWindow::OnKillFocus)
END_EVENT_TABLE()
wxLayoutWindow::wxLayoutWindow(wxWindow *parent)
: wxScrolledWindow(parent, -1, wxDefaultPosition, wxDefaultSize,
wxHSCROLL | wxVSCROLL | wxBORDER)
{
m_Editable = false;
m_doSendEvents = false;
m_ViewStartX = 0; m_ViewStartY = 0;
m_DoPopupMenu = true;
m_PopupMenu = MakeFormatMenu();
m_memDC = new wxMemoryDC;
m_bitmap = new wxBitmap(4,4);
m_bitmapSize = wxPoint(4,4);
m_llist = new wxLayoutList();
m_BGbitmap = NULL;
m_ScrollToCursor = false;
SetWrapMargin(0);
wxPoint max = m_llist->GetSize();
SetScrollbars(10, 20 /*lineHeight*/, max.x/10+1, max.y/20+1);
EnableScrolling(true,true);
m_maxx = max.x; m_maxy = max.y;
m_Selecting = false;
SetCursor(wxCURSOR_IBEAM);
SetDirty();
}
wxLayoutWindow::~wxLayoutWindow()
{
delete m_memDC; // deletes bitmap automatically (?)
delete m_bitmap;
delete m_llist;
delete m_PopupMenu;
SetBackgroundBitmap(NULL);
}
void
wxLayoutWindow::Clear(int family,
int size,
int style,
int weight,
int underline,
wxColour *fg,
wxColour *bg)
{
GetLayoutList()->Clear(family,size,style,weight,underline,fg,bg);
SetBackgroundColour(GetLayoutList()->GetDefaults()->GetBGColour());
ResizeScrollbars(true);
SetDirty();
SetModified(false);
wxRect r;
int w,h;
r.x = r.y = 0; GetSize(&w,&h);
r.width = w;
r.height = h;
DoPaint(&r);
}
#ifdef __WXMSW__
long
wxLayoutWindow::MSWGetDlgCode()
{
// if we don't return this, we won't get OnChar() events for TABs and ENTER
return DLGC_WANTCHARS | DLGC_WANTARROWS | DLGC_WANTMESSAGE;
}
#endif //MSW
void
wxLayoutWindow::OnMouse(int eventId, wxMouseEvent& event)
{
wxPaintDC dc( this );
PrepareDC( dc );
SetFocus();
wxPoint findPos;
findPos.x = dc.DeviceToLogicalX(event.GetX());
findPos.y = dc.DeviceToLogicalY(event.GetY());
findPos.x -= WXLO_XOFFSET;
findPos.y -= WXLO_YOFFSET;
if(findPos.x < 0) findPos.x = 0;
if(findPos.y < 0) findPos.y = 0;
m_ClickPosition = wxPoint(event.GetX(), event.GetY());
wxPoint cursorPos;
bool found;
wxLayoutObject *obj = m_llist->FindObjectScreen(dc, findPos,
&cursorPos, &found);
//has the mouse only been moved?
if(eventId == WXLOWIN_MENU_MOUSEMOVE)
{
// found is only true if we are really over an object, not just
// behind it
if(found && obj && obj->GetUserData() != NULL)
{
if(!m_HandCursor)
SetCursor(wxCURSOR_HAND);
m_HandCursor = TRUE;
}
else
{
if(m_HandCursor)
SetCursor(wxCURSOR_IBEAM);
m_HandCursor = FALSE;
}
return;
}
// always move cursor to mouse click:
if(obj && eventId == WXLOWIN_MENU_LCLICK)
{
m_llist->MoveCursorTo(cursorPos);
ScrollToCursor();
Refresh(FALSE); // DoPaint suppresses flicker under GTK
}
if(!m_doSendEvents) // nothing to do
return;
// only do the menu if activated, editable and not on a clickable object
if(eventId == WXLOWIN_MENU_RCLICK
&& IsEditable()
&& (! obj || (obj && obj->GetUserData() == NULL))
)
{
PopupMenu(m_PopupMenu, m_ClickPosition.x, m_ClickPosition.y);
return;
}
// find the object at this position
if(obj)
{
wxCommandEvent commandEvent(wxEVT_COMMAND_MENU_SELECTED, eventId);
commandEvent.SetEventObject( this );
commandEvent.SetClientData((char *)obj);
GetEventHandler()->ProcessEvent(commandEvent);
}
}
/*
* Some simple keyboard handling.
*/
void
wxLayoutWindow::OnChar(wxKeyEvent& event)
{
int keyCode = event.KeyCode();
#ifdef WXLAYOUT_DEBUG
if(keyCode == WXK_F1)
{
m_llist->Debug();
return;
}
#endif
if(! m_Selecting && event.ShiftDown())
{
switch(keyCode)
{
case WXK_UP:
case WXK_DOWN:
case WXK_RIGHT:
case WXK_LEFT:
case WXK_PRIOR:
case WXK_NEXT:
case WXK_HOME:
case WXK_END:
m_Selecting = true;
m_llist->StartSelection();
break;
default:
;
}
}
/* These two nested switches work like this:
The first one processes all non-editing keycodes, to move the
cursor, etc. It's default will process all keycodes causing
modifications to the buffer, but only if editing is allowed.
*/
switch(keyCode)
{
case WXK_RIGHT:
m_llist->MoveCursorHorizontally(1);
break;
case WXK_LEFT:
m_llist->MoveCursorHorizontally(-1);
break;
case WXK_UP:
m_llist->MoveCursorVertically(-1);
break;
case WXK_DOWN:
m_llist->MoveCursorVertically(1);
break;
case WXK_PRIOR:
m_llist->MoveCursorVertically(-20);
break;
case WXK_NEXT:
m_llist->MoveCursorVertically(20);
break;
case WXK_HOME:
m_llist->MoveCursorToBeginOfLine();
break;
case WXK_END:
m_llist->MoveCursorToEndOfLine();
break;
default:
if(keyCode == 'c' && event.ControlDown())
Copy();
if( IsEditable() )
{
/* First, handle control keys */
if(event.ControlDown() && ! event.AltDown())
{
switch(keyCode)
{
case WXK_DELETE :
case 'd':
m_llist->Delete(1);
break;
case 'y':
m_llist->DeleteLines(1);
break;
case 'h': // like backspace
if(m_llist->MoveCursorHorizontally(-1)) m_llist->Delete(1);
break;
case 'u':
m_llist->DeleteToBeginOfLine();
break;
case 'k':
m_llist->DeleteToEndOfLine();
break;
case 'v':
Paste();
break;
#ifdef WXLAYOUT_DEBUG
case WXK_F1:
m_llist->SetFont(-1,-1,-1,-1,true); // underlined
break;
#endif
default:
;
}
}
// ALT only:
else if( event.AltDown() && ! event.ControlDown() )
{
switch(keyCode)
{
case WXK_DELETE:
case 'd':
m_llist->DeleteWord();
break;
default:
;
}
}
// no control keys:
else if ( ! event.AltDown() && ! event.ControlDown())
{
switch(keyCode)
{
case WXK_INSERT:
if(event.ShiftDown())
Paste();
break;
case WXK_DELETE :
m_llist->Delete(1);
break;
case WXK_BACK: // backspace
if(m_llist->MoveCursorHorizontally(-1)) m_llist->Delete(1);
break;
case WXK_RETURN:
if(m_WrapMargin > 0)
m_llist->WrapLine(m_WrapMargin);
m_llist->LineBreak();
break;
default:
if((!(event.ControlDown() || event.AltDown() || event.MetaDown()))
&& (keyCode < 256 && keyCode >= 32)
)
{
wxString tmp;
tmp += keyCode;
if(m_WrapMargin > 0 && isspace(keyCode))
m_llist->WrapLine(m_WrapMargin);
m_llist->Insert(tmp);
}
break;
}
}
SetDirty();
SetModified();
}// if(IsEditable())
}// first switch()
if(m_Selecting)
{
if(event.ShiftDown())
m_llist->ContinueSelection();
else
{
m_llist->EndSelection();
m_Selecting = false;
}
}
ScrollToCursor();
wxRect r = *m_llist->GetUpdateRect();
DoPaint(&r);
}
void
wxLayoutWindow::OnKeyUp(wxKeyEvent& event)
{
if(event.KeyCode() == WXK_SHIFT && m_llist->IsSelecting())
m_llist->EndSelection();
event.Skip();
}
void
wxLayoutWindow::ScrollToCursor(void)
{
wxClientDC dc( this );
PrepareDC( dc );
int x0,y0,x1,y1, dx, dy;
// Calculate where the top of the visible area is:
ViewStart(&x0,&y0);
GetScrollPixelsPerUnit(&dx, &dy);
x0 *= dx; y0 *= dy;
WXLO_DEBUG(("ScrollToCursor: ViewStart is %d/%d", x0, y0));
// Get the size of the visible window:
GetClientSize(&x1,&y1);
wxASSERT(x1 > 0);
wxASSERT(y1 > 0);
// As we have the values anyway, use them to avoid unnecessary
// scrollbar updates.
if(x1 > m_maxx) m_maxx = x1;
if(y1 > m_maxy) m_maxy = y1;
/* Make sure that the scrollbars are at a position so that the
cursor is visible if we are editing. */
/** Scroll so that cursor is visible! */
WXLO_DEBUG(("m_ScrollToCursor = %d", (int) m_ScrollToCursor));
wxPoint cc = m_llist->GetCursorScreenPos(*m_memDC);
if(cc.x < x0 || cc.y < y0
|| cc.x >= x0+(9*x1)/10 || cc.y >= y0+(9*y1/10)) // (9*x)/10 == 90%
{
int nx, ny;
nx = cc.x - x1/2; if(nx < 0) nx = 0;
ny = cc.y - y1/2; if(ny < 0) ny = 0;
Scroll(nx/dx,ny/dy); // new view start
x0 = nx; y0 = ny;
m_ScrollToCursor = false; // avoid recursion
}
}
void
wxLayoutWindow::OnPaint( wxPaintEvent &WXUNUSED(event)) // or: OnDraw(wxDC& dc)
{
wxRect region = GetUpdateRegion().GetBox();
InternalPaint(& region);
}
void
wxLayoutWindow::DoPaint(const wxRect *updateRect)
{
#ifdef __WXGTK__
InternalPaint(updateRect);
#else
Refresh(FALSE, updateRect); // Causes bad flicker under wxGTK!!!
#endif
}
void
wxLayoutWindow::InternalPaint(const wxRect *updateRect)
{
wxPaintDC dc( this );
PrepareDC( dc );
int x0,y0,x1,y1, dx, dy;
// Calculate where the top of the visible area is:
ViewStart(&x0,&y0);
GetScrollPixelsPerUnit(&dx, &dy);
x0 *= dx; y0 *= dy;
// Get the size of the visible window:
GetClientSize(&x1,&y1);
wxASSERT(x1 > 0);
wxASSERT(y1 > 0);
// As we have the values anyway, use them to avoid unnecessary
// scrollbar updates.
if(x1 > m_maxx) m_maxx = x1;
if(y1 > m_maxy) m_maxy = y1;
WXLO_DEBUG(("Update rect: %ld,%ld / %ld,%ld",
updateRect->x, updateRect->y,
updateRect->x+updateRect->width,
updateRect->y+updateRect->height));
if(IsDirty())
{
m_llist->Layout(dc);
ResizeScrollbars();
}
/* Check whether the window has grown, if so, we need to reallocate
the bitmap to be larger. */
if(x1 > m_bitmapSize.x || y1 > m_bitmapSize.y)
{
wxASSERT(m_bitmapSize.x > 0);
wxASSERT(m_bitmapSize.y > 0);
m_memDC->SelectObject(wxNullBitmap);
delete m_bitmap;
m_bitmapSize = wxPoint(x1,y1);
m_bitmap = new wxBitmap(x1,y1);
m_memDC->SelectObject(*m_bitmap);
}
m_memDC->SetDeviceOrigin(0,0);
m_memDC->SetBrush(wxBrush(m_llist->GetDefaults()->GetBGColour(),wxSOLID));
m_memDC->SetPen(wxPen(m_llist->GetDefaults()->GetBGColour(),
0,wxTRANSPARENT));
m_memDC->SetLogicalFunction(wxCOPY);
/* Either fill the background with the background bitmap, or clear
it. */
if(m_BGbitmap)
{
CoordType
y, x,
w = m_BGbitmap->GetWidth(),
h = m_BGbitmap->GetHeight();
for(y = 0; y < y1; y+=h)
for(x = 0; x < x1; x+=w)
m_memDC->DrawBitmap(*m_BGbitmap, x, y);
m_memDC->SetBackgroundMode(wxTRANSPARENT);
}
else
{
// clear the background: (must not be done if we use the update rectangle!)
m_memDC->SetBackgroundMode(wxSOLID);
m_memDC->DrawRectangle(0,0,x1, y1);
}
/* This is the important bit: we tell the list to draw itself: */
#if WXLO_DEBUG_URECT
WXLO_DEBUG(("Update rect: %ld,%ld / %ld,%ld",
updateRect->x, updateRect->y,
updateRect->x+updateRect->width,
updateRect->y+updateRect->height));
#endif
// Device origins on the memDC are suspect, we translate manually
// with the translate parameter of Draw().
wxPoint offset(-x0+WXLO_XOFFSET,-y0+WXLO_YOFFSET);
m_llist->Draw(*m_memDC,offset, y0, y0+y1);
// We start calculating a new update rect before drawing the
// cursor, so that the cursor coordinates get included in the next
// update rectangle (although they are drawn on the memDC, this is
// needed to erase it):
m_llist->InvalidateUpdateRect();
m_llist->DrawCursor(*m_memDC,
m_HaveFocus && IsEditable(), // draw a thick
// cursor for editable windows with focus
offset);
// Now copy everything to the screen:
#if 0
// This somehow doesn't work, but even the following bit with the
// whole rect at once is still a bit broken I think.
wxRegionIterator ri ( GetUpdateRegion() );
if(ri)
while(ri)
{
WXLO_DEBUG(("UpdateRegion: %ld,%ld, %ld,%ld",
ri.GetX(),ri.GetY(),ri.GetW(),ri.GetH()));
dc.Blit(x0+ri.GetX(),y0+ri.GetY(),ri.GetW(),ri.GetH(),
m_memDC,ri.GetX(),ri.GetY(),wxCOPY,FALSE);
ri++;
}
else
#endif
{
// FIXME: Trying to copy only the changed parts, but it does not seem
// to work:
// x0 = updateRect->x; y0 = updateRect->y;
// if(updateRect->height < y1)
// y1 = updateRect->height;
// y1 += WXLO_YOFFSET; //FIXME might not be needed
dc.Blit(x0,y0,x1,y1,m_memDC,0,0,wxCOPY,FALSE);
}
ResetDirty();
m_ScrollToCursor = false;
}
// change the range and position of scrollbars
void
wxLayoutWindow::ResizeScrollbars(bool exact)
{
wxPoint max = m_llist->GetSize();
WXLO_DEBUG(("ResizeScrollbars: GetSize: %ld, %ld", (long int)max.x,
(long int) max.y));
if(max.x > m_maxx || max.y > m_maxy
|| max.x > m_maxx-WXLO_ROFFSET || max.y > m_maxy-WXLO_BOFFSET
|| exact)
{
if(! exact)
{
// add an extra bit to the sizes to avoid future updates
max.x = max.x+WXLO_ROFFSET;
max.y = max.y+WXLO_BOFFSET;
}
ViewStart(&m_ViewStartX, &m_ViewStartY);
SetScrollbars(10, 20, max.x/10+1,max.y/20+1,m_ViewStartX,m_ViewStartY,true);
m_maxx = max.x; m_maxy = max.y;
}
}
void
wxLayoutWindow::Paste(void)
{
wxString text;
// Read some text
if (wxTheClipboard->Open())
{
wxTextDataObject data;
if (wxTheClipboard->IsSupported( data.GetFormat() ))
{
wxTheClipboard->GetData(&data);
text += data.GetText();
}
wxTheClipboard->Close();
}
#if 0
/* My attempt to get the primary selection, but it does not
work. :-( */
if(text.Length() == 0)
{
wxTextCtrl tmp_tctrl(this,-1);
tmp_tctrl.Paste();
text += tmp_tctrl.GetValue();
}
#endif
wxLayoutImportText( m_llist, text);
}
bool
wxLayoutWindow::Copy(void)
{
// Calling GetSelection() will automatically do an EndSelection()
// on the list, but we need to take a note of it, too:
if(m_Selecting)
{
m_Selecting = false;
m_llist->EndSelection();
}
wxLayoutList *llist = m_llist->GetSelection();
if(! llist)
return FALSE;
wxString text;
wxLayoutExportObject *export;
wxLayoutExportStatus status(llist);
while((export = wxLayoutExport( &status, WXLO_EXPORT_AS_TEXT)) != NULL)
{
if(export->type == WXLO_EXPORT_TEXT)
text << *(export->content.text);
delete export;
}
delete llist;
// The exporter always appends a newline, so we chop it off if it
// is there:
{
size_t len = text.Length();
if(len > 2 && text[len-2] == '\r') // Windows
text = text.Mid(0,len-2);
else if(len > 1 && text[len-1] == '\n')
text = text.Mid(0,len-1);
}
// Read some text
if (wxTheClipboard->Open())
{
wxTextDataObject *data = new wxTextDataObject( text );
bool rc = wxTheClipboard->SetData( data );
wxTheClipboard->Close();
return rc;
}
return FALSE;
}
bool
wxLayoutWindow::Cut(void)
{
if(Copy())
{
m_llist->DeleteSelection();
return TRUE;
}
else
return FALSE;
}
bool
wxLayoutWindow::Find(const wxString &needle,
wxPoint * fromWhere)
{
wxPoint found;
if(fromWhere == NULL)
found = m_llist->FindText(needle, m_llist->GetCursorPos());
else
found = m_llist->FindText(needle, *fromWhere);
if(found.x != -1)
{
if(fromWhere)
{
*fromWhere = found;
fromWhere->x ++;
}
m_llist->MoveCursorTo(found);
ScrollToCursor();
return true;
}
return false;
}
wxMenu *
wxLayoutWindow::MakeFormatMenu()
{
wxMenu *m = new wxMenu(_("Layout Menu"));
m->Append(WXLOWIN_MENU_LARGER ,_("&Larger"),_("Switch to larger font."), false);
m->Append(WXLOWIN_MENU_SMALLER ,_("&Smaller"),_("Switch to smaller font."), false);
m->AppendSeparator();
m->Append(WXLOWIN_MENU_UNDERLINE_ON, _("&Underline on"),_("Activate underline mode."), false);
m->Append(WXLOWIN_MENU_UNDERLINE_OFF,_("&Underline off"),_("Deactivate underline mode."), false);
m->Append(WXLOWIN_MENU_BOLD_ON ,_("&Bold on"),_("Activate bold mode."), false);
m->Append(WXLOWIN_MENU_BOLD_OFF ,_("&Bold off"),_("Deactivate bold mode."), false);
m->Append(WXLOWIN_MENU_ITALICS_ON ,_("&Italics on"),_("Activate italics mode."), false);
m->Append(WXLOWIN_MENU_ITALICS_OFF ,_("&Italics off"),_("Deactivate italics mode."), false);
m->AppendSeparator();
m->Append(WXLOWIN_MENU_ROMAN ,_("&Roman"),_("Switch to roman font."), false);
m->Append(WXLOWIN_MENU_TYPEWRITER,_("&Typewriter"),_("Switch to typewriter font."), false);
m->Append(WXLOWIN_MENU_SANSSERIF ,_("&Sans Serif"),_("Switch to sans serif font."), false);
return m;
}
void wxLayoutWindow::OnMenu(wxCommandEvent& event)
{
switch (event.GetId())
{
case WXLOWIN_MENU_LARGER:
m_llist->SetFontLarger(); break;
case WXLOWIN_MENU_SMALLER:
m_llist->SetFontSmaller(); break;
case WXLOWIN_MENU_UNDERLINE_ON:
m_llist->SetFontUnderline(true); break;
case WXLOWIN_MENU_UNDERLINE_OFF:
m_llist->SetFontUnderline(false); break;
case WXLOWIN_MENU_BOLD_ON:
m_llist->SetFontWeight(wxBOLD); break;
case WXLOWIN_MENU_BOLD_OFF:
m_llist->SetFontWeight(wxNORMAL); break;
case WXLOWIN_MENU_ITALICS_ON:
m_llist->SetFontStyle(wxITALIC); break;
case WXLOWIN_MENU_ITALICS_OFF:
m_llist->SetFontStyle(wxNORMAL); break;
case WXLOWIN_MENU_ROMAN:
m_llist->SetFontFamily(wxROMAN); break;
case WXLOWIN_MENU_TYPEWRITER:
m_llist->SetFontFamily(wxFIXED); break;
case WXLOWIN_MENU_SANSSERIF:
m_llist->SetFontFamily(wxSWISS); break;
}
}
void
wxLayoutWindow::OnSetFocus(wxFocusEvent &ev)
{
m_HaveFocus = true;
//FIXME: need argument DoPaint(); // to repaint the cursor
}
void
wxLayoutWindow::OnKillFocus(wxFocusEvent &ev)
{
m_HaveFocus = false;
//FIXME: need argument DoPaint(); // to repaint the cursor
}