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wxWidgets/user/wxLayout/wxlwindow.cpp
Karsten Ballüder 43e916c33e New, rewritten, wxLayout. Almost complete. 
git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@1873 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
1999-03-07 21:38:50 +00:00

415 lines
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C++
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/*-*- 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 "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"
#else
# ifdef __WXMSW__
# include <windows.h>
# undef FindWindow
# undef GetCharWidth
# undef StartDoc
# endif
# include "wxlwindow.h"
#endif
BEGIN_EVENT_TABLE(wxLayoutWindow,wxScrolledWindow)
EVT_PAINT (wxLayoutWindow::OnPaint)
EVT_CHAR (wxLayoutWindow::OnChar)
EVT_LEFT_DOWN(wxLayoutWindow::OnLeftMouseClick)
EVT_RIGHT_DOWN(wxLayoutWindow::OnRightMouseClick)
EVT_LEFT_DCLICK(wxLayoutWindow::OnMouseDblClick)
EVT_MENU_RANGE(WXLOWIN_MENU_FIRST, WXLOWIN_MENU_LAST, wxLayoutWindow::OnMenu)
EVT_SET_FOCUS(wxLayoutWindow::OnSetFocus)
EVT_KILL_FOCUS(wxLayoutWindow::OnKillFocus)
END_EVENT_TABLE()
/*
EVT_MENU(WXLOWIN_MENU_LARGER, wxLayoutWindow::OnMenu)
EVT_MENU(WXLOWIN_MENU_SMALLER, wxLayoutWindow::OnMenu)
EVT_MENU(WXLOWIN_MENU_UNDERLINE_ON, wxLayoutWindow::OnMenu)
EVT_MENU(WXLOWIN_MENU_UNDERLINE_OFF, wxLayoutWindow::OnMenu)
EVT_MENU(WXLOWIN_MENU_BOLD_ON, wxLayoutWindow::OnMenu)
EVT_MENU(WXLOWIN_MENU_BOLD_OFF, wxLayoutWindow::OnMenu)
EVT_MENU(WXLOWIN_MENU_ITALICS_ON, wxLayoutWindow::OnMenu)
EVT_MENU(WXLOWIN_MENU_ITALICS_OFF, wxLayoutWindow::OnMenu)
EVT_MENU(WXLOWIN_MENU_ROMAN, wxLayoutWindow::OnMenu)
EVT_MENU(WXLOWIN_MENU_TYPEWRITER, wxLayoutWindow::OnMenu)
EVT_MENU(WXLOWIN_MENU_SANSSERIF, wxLayoutWindow::OnMenu)
*/
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();
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;
SetDirty();
}
wxLayoutWindow::~wxLayoutWindow()
{
delete m_memDC; // deletes bitmap automatically (?)
delete m_bitmap;
delete m_llist;
delete m_PopupMenu;
}
#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)
{
if(!m_doSendEvents) // nothing to do
return;
wxPaintDC dc( this );
PrepareDC( dc );
SetFocus();
wxPoint findPos;
findPos.x = dc.DeviceToLogicalX(event.GetX());
findPos.y = dc.DeviceToLogicalY(event.GetY());
#ifdef WXLAYOUT_DEBUG
wxLogDebug("wxLayoutWindow::OnMouse: (%d, %d) -> (%d, %d)",
event.GetX(), event.GetY(), findPos.x, findPos.y);
#endif
m_ClickPosition = findPos;
wxLayoutObject *obj = m_llist->FindObject(findPos);
#ifdef WXLAYOUT_DEBUG
if(obj)
wxLogDebug("wxLayoutWindow::OnMouse: Found object of type %d.",
obj->GetType());
else
wxLogDebug("wxLayoutWindow::OnMouse: Found no object.");
#endif
// 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, event.GetX(), event.GetY());
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)
{
if(!IsEditable()) // do nothing
{
event.Skip();
return;
}
long keyCode = event.KeyCode();
/* First, handle control keys */
if(event.ControlDown() && ! event.AltDown())
{
switch(event.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;
default:
;
}
}
// ALT only:
else if( event.AltDown() && ! event.ControlDown() )
{
switch(event.KeyCode())
{
case WXK_DELETE:
case 'd':
m_llist->DeleteWord();
break;
default:
;
}
}
// no control keys:
else if ( ! event.AltDown() && ! event.ControlDown())
{
switch(event.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;
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:
m_llist->LineBreak();
break;
default:
if((!(event.ControlDown() || event.AltDown() || event.MetaDown()))
&& (keyCode < 256 && keyCode >= 32)
)
{
wxString tmp;
tmp += keyCode;
m_llist->Insert(tmp);
//// m_llist->WrapLine();
}
break;
}
}
SetDirty();
DoPaint(true); // paint and scroll to cursor
}
void
wxLayoutWindow::OnPaint( wxPaintEvent &WXUNUSED(event)) // or: OnDraw(wxDC& dc)
{
DoPaint();
}
void
wxLayoutWindow::DoPaint(bool scrollToCursor)
{
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);
// Maybe we need to change the scrollbar sizes or positions,
// so layout the list and check:
if(IsDirty() || scrollToCursor)
m_llist->Layout(dc);
if(IsDirty())
ResizeScrollbars();
/* 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! */
if(IsEditable() && scrollToCursor)
{
wxPoint cc = m_llist->GetCursorScreenPos();
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;
}
}
/* 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);
}
// Device origins on the memDC are suspect, we translate manually
// with the translate parameter of Draw().
m_memDC->SetDeviceOrigin(0,0);
m_memDC->Clear();
// The +4 give the window a tiny border on the left and top, looks nice.
wxPoint offset(-x0+4,-y0+4);
m_llist->Draw(*m_memDC,offset);
if(IsEditable())
m_llist->DrawCursor(*m_memDC,m_HaveFocus,offset);
// Now copy everything to the screen:
dc.Blit(x0,y0,x1,y1,m_memDC,0,0,wxCOPY,FALSE);
ResetDirty();
}
// change the range and position of scroll bars
void
wxLayoutWindow::ResizeScrollbars(bool exact)
{
wxPoint max = m_llist->GetSize();
if(max.x > m_maxx || max.y > m_maxy
|| max.x < (7*m_maxx)/10 || max.y << (7*m_maxy)/10
|| exact)
{
if(! exact) // add an extra 20% to the sizes to avoid future updates
{
max.x = (12*max.x)/10; // 12/20 = 120%
max.y = (12*max.y)/10;
}
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;
}
}
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;
DoPaint(); // to repaint the cursor
}
void
wxLayoutWindow::OnKillFocus(wxFocusEvent &ev)
{
m_HaveFocus = true;
DoPaint(); // to repaint the cursor
}
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