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08a43154b4
wxWidgets/samples/richedit/wxlwindow.cpp
Vadim Zeitlin 4e16881a08 readded clipboard support to richedit sample and fixed a fatal bug in 
wxCustomDataObject (uninitialized m_data) which this allowed to discover


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@4330 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
1999-11-03 01:13:04 +00:00

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/*-*- c++ -*-********************************************************
* wxLwindow.h : a scrolled Window for displaying/entering rich text*
* *
* (C) 1998, 1999 by Karsten Ballüder (karsten@phy.hw.ac.uk) *
* *
* $Id$
*******************************************************************/
// ============================================================================
// declarations
// ============================================================================
// ----------------------------------------------------------------------------
// headers
// ----------------------------------------------------------------------------
#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"
# include "MDialogs.h"
# include "strutil.h"
#else
# ifdef __WXMSW__
# include <wx/msw/private.h>
# endif
# include "wxlwindow.h"
# include "wxlparser.h"
#endif
#include <wx/clipbrd.h>
#include <wx/textctrl.h>
#include <wx/dataobj.h>
#ifdef WXLAYOUT_USE_CARET
# include <wx/caret.h>
#endif // WXLAYOUT_USE_CARET
#include <ctype.h>
// ----------------------------------------------------------------------------
// macros
// ----------------------------------------------------------------------------
#ifdef DEBUG
# define WXLO_DEBUG(x) wxLogDebug x
#else
# define WXLO_DEBUG(x)
#endif
// ----------------------------------------------------------------------------
// constants
// ----------------------------------------------------------------------------
/// 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
/// scroll margins when selecting with the mouse
#define WXLO_SCROLLMARGIN_X 10
#define WXLO_SCROLLMARGIN_Y 10
/// the size of one scrollbar page in pixels
static const int X_SCROLL_PAGE = 10;
static const int Y_SCROLL_PAGE = 20;
// ----------------------------------------------------------------------------
// event tables
// ----------------------------------------------------------------------------
BEGIN_EVENT_TABLE(wxLayoutWindow,wxScrolledWindow)
EVT_SIZE (wxLayoutWindow::OnSize)
EVT_PAINT (wxLayoutWindow::OnPaint)
EVT_CHAR (wxLayoutWindow::OnChar)
EVT_KEY_UP (wxLayoutWindow::OnKeyUp)
EVT_LEFT_DOWN(wxLayoutWindow::OnLeftMouseDown)
EVT_LEFT_UP(wxLayoutWindow::OnLeftMouseUp)
EVT_RIGHT_DOWN(wxLayoutWindow::OnRightMouseClick)
EVT_LEFT_DCLICK(wxLayoutWindow::OnMouseDblClick)
EVT_MIDDLE_DOWN(wxLayoutWindow::OnMiddleMouseDown)
EVT_MOTION (wxLayoutWindow::OnMouseMove)
EVT_UPDATE_UI(WXLOWIN_MENU_UNDERLINE, wxLayoutWindow::OnUpdateMenuUnderline)
EVT_UPDATE_UI(WXLOWIN_MENU_BOLD, wxLayoutWindow::OnUpdateMenuBold)
EVT_UPDATE_UI(WXLOWIN_MENU_ITALICS, wxLayoutWindow::OnUpdateMenuItalic)
EVT_MENU_RANGE(WXLOWIN_MENU_FIRST, WXLOWIN_MENU_LAST, wxLayoutWindow::OnMenu)
EVT_SET_FOCUS(wxLayoutWindow::OnSetFocus)
EVT_KILL_FOCUS(wxLayoutWindow::OnKillFocus)
// EVT_IDLE(wxLayoutWindow::ResizeScrollbars)
END_EVENT_TABLE()
// ----------------------------------------------------------------------------
// function prototypes
// ----------------------------------------------------------------------------
/// returns TRUE if keyCode is one of arrows/home/end/page{up|down} keys
static bool IsDirectionKey(long keyCode);
// ============================================================================
// implementation
// ============================================================================
#ifndef wxWANTS_CHARS
# define wxWANTS_CHARS 0
#endif
// ----------------------------------------------------------------------------
// wxLayoutWindow
// ----------------------------------------------------------------------------
wxLayoutWindow::wxLayoutWindow(wxWindow *parent)
: wxScrolledWindow(parent, -1,
wxDefaultPosition, wxDefaultSize,
wxHSCROLL | wxVSCROLL |
wxBORDER |
wxWANTS_CHARS),
m_llist(NULL)
{
SetStatusBar(NULL); // don't use statusbar
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;
#ifndef __WXMSW__
m_FocusFollowMode = false;
#endif
SetWrapMargin(0);
// no scrollbars initially
m_hasHScrollbar =
m_hasVScrollbar = false;
m_Selecting = false;
#ifdef WXLAYOUT_USE_CARET
// FIXME cursor size shouldn't be hardcoded
wxCaret *caret = new wxCaret(this, 2, 20);
SetCaret(caret);
m_llist->SetCaret(caret);
#endif // WXLAYOUT_USE_CARET
m_HaveFocus = FALSE;
m_HandCursor = FALSE;
m_CursorVisibility = -1;
SetCursor(wxCURSOR_IBEAM);
SetDirty();
// at least under Windows, this should be the default behaviour
m_AutoDeleteSelection = TRUE;
}
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()->GetDefaultStyleInfo().GetBGColour());
wxScrolledWindow::Clear();
ResizeScrollbars(true);
SetDirty();
SetModified(FALSE);
if ( m_Editable )
m_CursorVisibility = 1;
#ifdef WXLAYOUT_USE_CARET
if ( m_CursorVisibility == 1 )
GetCaret()->Show();
#endif // WXLAYOUT_USE_CARET
RequestUpdate((wxRect *)NULL);
}
void wxLayoutWindow::Refresh(bool eraseBackground, const wxRect *rect)
{
wxScrolledWindow::Refresh(eraseBackground, rect);
}
void
wxLayoutWindow::OnMouse(int eventId, wxMouseEvent& event)
{
wxClientDC dc( this );
PrepareDC( dc );
if ( eventId != WXLOWIN_MENU_MOUSEMOVE
#ifndef __WXMSW__
|| m_FocusFollowMode
#endif
)
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());
// Scroll the window if the mouse is at the end of it:
if(m_Selecting && eventId == WXLOWIN_MENU_MOUSEMOVE)
{
//WXLO_DEBUG(("selecting at : %d/%d", (int) event.GetX(), (int)event.GetY()));
int left, top;
ViewStart(&left, &top);
wxSize size = GetClientSize();
int xdelta, ydelta;
if(event.GetX() < WXLO_SCROLLMARGIN_X)
xdelta = -(WXLO_SCROLLMARGIN_X-event.GetX());
else if(event.GetX() > size.x-WXLO_SCROLLMARGIN_X)
xdelta = event.GetX()-size.x+WXLO_SCROLLMARGIN_X;
else
xdelta = 0;
if(event.GetY() < WXLO_SCROLLMARGIN_Y)
ydelta = -(WXLO_SCROLLMARGIN_Y-event.GetY());
else if(event.GetY() > size.y-WXLO_SCROLLMARGIN_Y)
ydelta = event.GetY()-size.y+WXLO_SCROLLMARGIN_Y;
else
ydelta = 0;
//WXLO_DEBUG(("xdelta: %d", (int) xdelta));
if(xdelta != 0 || ydelta != 0)
{
top += ydelta; if(top < 0) top = 0;
left += xdelta; if(left < 0) left = 0;
Scroll(left, top);
}
}
wxPoint cursorPos;
bool found;
wxLayoutObject *obj = m_llist->FindObjectScreen(dc, findPos,
&cursorPos, &found);
wxLayoutObject::UserData *u = obj ? obj->GetUserData() : NULL;
// has the mouse only been moved?
switch ( eventId )
{
case WXLOWIN_MENU_MOUSEMOVE:
{
// this variables is used to only erase the message in the status
// bar if we had put it there previously - otherwise empting status
// bar might be undesirable
static bool s_hasPutMessageInStatusBar = false;
// found is only true if we are really over an object, not just
// behind it
if(found && u && ! m_Selecting)
{
if(!m_HandCursor)
SetCursor(wxCURSOR_HAND);
m_HandCursor = TRUE;
if(m_StatusBar && m_StatusFieldLabel != -1)
{
const wxString &label = u->GetLabel();
if(label.Length())
{
m_StatusBar->SetStatusText(label,
m_StatusFieldLabel);
s_hasPutMessageInStatusBar = true;
}
}
}
else
{
if(m_HandCursor)
SetCursor(wxCURSOR_IBEAM);
m_HandCursor = FALSE;
if( m_StatusBar && m_StatusFieldLabel != -1 &&
s_hasPutMessageInStatusBar )
{
m_StatusBar->SetStatusText("", m_StatusFieldLabel);
}
}
}
// selecting?
if ( event.LeftIsDown() )
{
// m_Selecting might not be set if the button got pressed
// outside this window, so check for it:
if( m_Selecting )
{
m_llist->ContinueSelection(cursorPos, m_ClickPosition);
RequestUpdate(); // TODO: we don't have to redraw everything!
}
}
if ( u )
{
u->DecRef();
u = NULL;
}
break;
case WXLOWIN_MENU_LDOWN:
{
// always move cursor to mouse click:
m_llist->MoveCursorTo(cursorPos);
// clicking a mouse removes the selection
if ( m_llist->HasSelection() )
{
m_llist->DiscardSelection();
m_Selecting = false;
RequestUpdate(); // TODO: we don't have to redraw everything!
}
// Calculate where the top of the visible area is:
int x0, y0;
ViewStart(&x0,&y0);
int dx, dy;
GetScrollPixelsPerUnit(&dx, &dy);
x0 *= dx; y0 *= dy;
wxPoint offset(-x0+WXLO_XOFFSET, -y0+WXLO_YOFFSET);
if(m_CursorVisibility == -1)
m_CursorVisibility = 1;
#ifdef WXLAYOUT_USE_CARET
if ( m_CursorVisibility == 1 )
GetCaret()->Show();
#endif // WXLAYOUT_USE_CARET
if(m_CursorVisibility)
{
// draw a thick cursor for editable windows with focus
m_llist->DrawCursor(dc, m_HaveFocus && IsEditable(), offset);
}
#ifdef __WXGTK__
RequestUpdate(); // RequestUpdate suppresses flicker under GTK
#endif // wxGTK
// start selection
m_llist->StartSelection(wxPoint(-1, -1), m_ClickPosition);
m_Selecting = true;
}
break;
case WXLOWIN_MENU_LUP:
if ( m_Selecting )
{
m_llist->EndSelection();
m_Selecting = false;
RequestUpdate(); // TODO: we don't have to redraw everything!
}
break;
case WXLOWIN_MENU_MDOWN:
Paste(TRUE);
break;
case WXLOWIN_MENU_DBLCLICK:
// select a word under cursor
m_llist->MoveCursorTo(cursorPos);
m_llist->MoveCursorWord(-1);
m_llist->StartSelection();
m_llist->MoveCursorWord(1, false);
m_llist->EndSelection();
m_Selecting = false;
RequestUpdate(); // TODO: we don't have to redraw everything!
break;
}
// notify about mouse events?
if( m_doSendEvents )
{
// only do the menu if activated, editable and not on a clickable object
if(eventId == WXLOWIN_MENU_RCLICK
&& IsEditable()
&& (! obj || u == NULL))
{
PopupMenu(m_PopupMenu, m_ClickPosition.x, m_ClickPosition.y);
if(u) u->DecRef();
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);
}
}
if( u ) u->DecRef();
}
// ----------------------------------------------------------------------------
// keyboard handling.
// ----------------------------------------------------------------------------
void
wxLayoutWindow::OnChar(wxKeyEvent& event)
{
int keyCode = event.KeyCode();
bool ctrlDown = event.ControlDown();
#ifdef WXLAYOUT_DEBUG
if(keyCode == WXK_F1)
{
m_llist->Debug();
return;
}
#endif
// Force m_Selecting to be false if shift is no longer
// pressed. OnKeyUp() cannot catch all Shift-Up events.
if(m_Selecting && !event.ShiftDown())
{
m_Selecting = false;
m_llist->EndSelection();
m_llist->DiscardSelection(); //FIXME: correct?
}
// If we deleted the selection here, we must not execute the
// deletion in Delete/Backspace handling.
bool deletedSelection = false;
// pressing any non-arrow key optionally replaces the selection:
if(m_AutoDeleteSelection
&& !m_Selecting
&& m_llist->HasSelection()
&& ! IsDirectionKey(keyCode)
&& ! (event.AltDown() || ctrlDown)
)
{
m_llist->DeleteSelection();
deletedSelection = true;
SetDirty();
}
// <Shift>+<arrow> starts selection
if ( IsDirectionKey(keyCode) )
{
// just continue the old selection
if ( m_Selecting )
{
if( event.ShiftDown() )
m_llist->ContinueSelection();
else
{
m_llist->DiscardSelection();
m_Selecting = false;
}
}
else if( event.ShiftDown() )
{
m_Selecting = true;
m_llist->StartSelection();
}
}
// If needed, make cursor visible:
if(m_CursorVisibility == -1)
m_CursorVisibility = 1;
/* 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:
if ( ctrlDown )
m_llist->MoveCursorWord(1);
else
m_llist->MoveCursorHorizontally(1);
break;
case WXK_LEFT:
if ( ctrlDown )
m_llist->MoveCursorWord(-1);
else
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(-Y_SCROLL_PAGE);
break;
case WXK_NEXT:
m_llist->MoveCursorVertically(Y_SCROLL_PAGE);
break;
case WXK_HOME:
if ( ctrlDown )
m_llist->MoveCursorTo(wxPoint(0, 0));
else
m_llist->MoveCursorToBeginOfLine();
break;
case WXK_END:
if ( ctrlDown )
m_llist->MoveCursorToEnd();
else
m_llist->MoveCursorToEndOfLine();
break;
default:
if(ctrlDown && ! IsEditable())
switch(keyCode)
{
case 'c':
// this should work even in read-only mode
Copy();
break;
#ifdef M_BASEDIR
case 's': // search
Find("");
break;
case 't': // search again
FindAgain();
break;
#endif
default:
;
}
else if( IsEditable() )
{
/* First, handle control keys */
if(ctrlDown && ! event.AltDown())
{
if(keyCode >= 'A' && keyCode <= 'Z')
keyCode = tolower(keyCode);
switch(keyCode)
{
case WXK_INSERT:
Copy();
break;
case WXK_DELETE :
if(! deletedSelection)
{
m_llist->DeleteWord();
SetDirty();
}
break;
case 'd':
if(! deletedSelection) // already done
{
m_llist->Delete(1);
SetDirty();
}
break;
case 'y':
m_llist->DeleteLines(1);
SetDirty();
break;
case 'h': // like backspace
if(m_llist->MoveCursorHorizontally(-1))
{
m_llist->Delete(1);
SetDirty();
}
break;
#ifdef M_BASEDIR
case 's': // search
Find("");
break;
case 't': // search again
FindAgain();
break;
#endif
case 'u':
m_llist->DeleteToBeginOfLine();
SetDirty();
break;
case 'k':
m_llist->DeleteToEndOfLine();
SetDirty();
break;
case 'v':
Paste();
break;
case 'x':
Cut();
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();
SetDirty();
break;
default:
;
}
}
// no control keys:
else if ( ! event.AltDown() && ! event.ControlDown())
{
switch(keyCode)
{
case WXK_INSERT:
if(event.ShiftDown())
Paste();
break;
case WXK_DELETE :
if(event.ShiftDown())
Cut();
else
if(! deletedSelection)
{
m_llist->Delete(1);
SetDirty();
}
break;
case WXK_BACK: // backspace
if(! deletedSelection)
if(m_llist->MoveCursorHorizontally(-1))
{
m_llist->Delete(1);
SetDirty();
}
break;
case WXK_RETURN:
if(m_WrapMargin > 0)
m_llist->WrapLine(m_WrapMargin);
m_llist->LineBreak();
SetDirty();
break;
case WXK_TAB:
if ( !event.ShiftDown() )
{
// TODO should be configurable
static const int tabSize = 8;
CoordType x = m_llist->GetCursorPos().x;
size_t numSpaces = tabSize - x % tabSize;
m_llist->Insert(wxString(' ', numSpaces));
SetDirty();
}
break;
default:
if((!(event.ControlDown() || event.AltDown()
//#if 0
///FIXME: wxGTK reports MetaDown always
|| event.MetaDown()
//#endif
))
&& (keyCode < 256 && keyCode >= 32)
)
{
if(m_WrapMargin > 0 && isspace(keyCode))
m_llist->WrapLine(m_WrapMargin);
m_llist->Insert((char)keyCode);
SetDirty();
}
break;
}
}
}// if(IsEditable())
}// first switch()
if ( m_Selecting )
{
// continue selection to the current (new) cursor position
m_llist->ContinueSelection();
}
ScrollToCursor();
// refresh the screen
RequestUpdate(m_llist->GetUpdateRect());
}
void
wxLayoutWindow::OnKeyUp(wxKeyEvent& event)
{
if ( event.KeyCode() == WXK_SHIFT && m_Selecting )
{
m_llist->EndSelection();
m_Selecting = false;
}
event.Skip();
}
void
wxLayoutWindow::ScrollToCursor(void)
{
//is always needed to make sure we know where the cursor is
//if(IsDirty())
RequestUpdate(m_llist->GetUpdateRect());
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);
// Make sure that the scrollbars are at a position so that the cursor is
// visible if we are editing
WXLO_DEBUG(("m_ScrollToCursor = %d", (int) m_ScrollToCursor));
wxPoint cc = m_llist->GetCursorScreenPos();
// the cursor should be completely visible in both directions
wxPoint cs(m_llist->GetCursorSize());
int nx = -1,
ny = -1;
if ( cc.x < x0 || cc.x >= x0 + x1 - cs.x )
{
nx = cc.x - x1/2;
if ( nx < 0 )
nx = 0;
}
if ( cc.y < y0 || cc.y >= y0 + y1 - cs.y )
{
ny = cc.y - y1/2;
if ( ny < 0)
ny = 0;
}
if ( nx != -1 || ny != -1 )
{
// set new view start
Scroll(nx == -1 ? -1 : (nx+dx-1)/dx, ny == -1 ? -1 : (ny+dy-1)/dy);
// avoid recursion
m_ScrollToCursor = false;
RequestUpdate();
}
}
void
wxLayoutWindow::OnPaint( wxPaintEvent &WXUNUSED(event))
{
wxRect region = GetUpdateRegion().GetBox();
InternalPaint(&region);
}
void
wxLayoutWindow::RequestUpdate(const wxRect *updateRect)
{
#ifdef __WXGTK__
// Calling Refresh() causes bad flicker under wxGTK!!!
InternalPaint(updateRect);
#else
// shouldn't specify the update rectangle if it doesn't include all the
// changed locations - otherwise, they won't be repainted at all because
// the system clips the display to the update rect
Refresh(FALSE); //, updateRect);
#endif
}
void
wxLayoutWindow::InternalPaint(const wxRect *updateRect)
{
wxPaintDC dc( this );
PrepareDC( dc );
#ifdef WXLAYOUT_USE_CARET
// hide the caret before drawing anything
GetCaret()->Hide();
#endif // WXLAYOUT_USE_CARET
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);
if(updateRect)
{
WXLO_DEBUG(("Update rect: %ld,%ld / %ld,%ld",
updateRect->x, updateRect->y,
updateRect->x+updateRect->width,
updateRect->y+updateRect->height));
}
if(IsDirty())
{
WXLO_DEBUG(("InternalPaint, isdirty, list size: %ld,%ld",
(unsigned long) m_llist->GetSize().x,
(unsigned long) m_llist->GetSize().y));
// m_llist->ForceTotalLayout();
m_llist->Layout(dc);
WXLO_DEBUG(("InternalPaint, isdirty, list size after layout: %ld,%ld",
(unsigned long) m_llist->GetSize().x,
(unsigned long) m_llist->GetSize().y));
ResizeScrollbars();
ResetDirty();
}
/* 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->SetBackground(wxBrush(m_llist->GetDefaultStyleInfo().GetBGColour(),wxSOLID));
m_memDC->SetPen(wxPen(m_llist->GetDefaultStyleInfo().GetBGColour(),
0,wxTRANSPARENT));
m_memDC->SetLogicalFunction(wxCOPY);
m_memDC->Clear();
// fill the background with the background bitmap
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);
}
// This is the important bit: we tell the list to draw itself
#if WXLO_DEBUG_URECT
if(updateRect)
{
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();
if(m_CursorVisibility != 0)
{
// draw a thick cursor for editable windows with focus
m_llist->DrawCursor(*m_memDC,
m_HaveFocus && IsEditable(),
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);
}
#ifdef WXLAYOUT_USE_CARET
// show the caret back after everything is redrawn
GetCaret()->Show();
#endif // WXLAYOUT_USE_CARET
ResetDirty();
if ( m_StatusBar && m_StatusFieldCursor != -1 )
{
static wxPoint s_oldCursorPos(-1, -1);
wxPoint pos(m_llist->GetCursorPos());
// avoid unnecessary status bar refreshes
if ( pos != s_oldCursorPos )
{
s_oldCursorPos = pos;
wxString label;
label.Printf(_("Ln:%d Col:%d"), pos.y + 1, pos.x + 1);
m_StatusBar->SetStatusText(label, m_StatusFieldCursor);
}
}
}
void
wxLayoutWindow::OnSize(wxSizeEvent &event)
{
if ( m_llist )
ResizeScrollbars();
event.Skip();
}
// change the range and position of scrollbars
void
wxLayoutWindow::ResizeScrollbars(bool exact)
{
if(IsDirty())
{
wxClientDC dc( this );
PrepareDC( dc );
// m_llist->ForceTotalLayout();
m_llist->Layout(dc);
ResetDirty();
RequestUpdate();
}
wxPoint max = m_llist->GetSize();
wxSize size = GetClientSize();
WXLO_DEBUG(("ResizeScrollbars: max size = (%ld, %ld)",
(long int)max.x, (long int) max.y));
// in the absence of scrollbars we should compare with the client size
if ( !m_hasHScrollbar )
m_maxx = size.x;// - WXLO_ROFFSET;
if ( !m_hasVScrollbar )
m_maxy = size.y;// - WXLO_BOFFSET;
// check if the text hasn't become too big
// TODO why do we set both at once? they're independent...
if( max.x > m_maxx - WXLO_ROFFSET || max.y > m_maxy - WXLO_BOFFSET || exact )
{
// text became too large
if ( !exact )
{
// add an extra bit to the sizes to avoid future updates
max.x += WXLO_ROFFSET;
max.y += WXLO_BOFFSET;
}
ViewStart(&m_ViewStartX, &m_ViewStartY);
SetScrollbars(X_SCROLL_PAGE, Y_SCROLL_PAGE,
max.x / X_SCROLL_PAGE + 1, max.y / Y_SCROLL_PAGE + 1,
m_ViewStartX, m_ViewStartY,
true);
m_hasHScrollbar =
m_hasVScrollbar = true;
m_maxx = max.x + X_SCROLL_PAGE;
m_maxy = max.y + Y_SCROLL_PAGE;
}
#if 0
//FIXME: this code is pretty broken, producing "arithmetic
//exception" crashes (div by 0??)
else
{
// check if the window hasn't become too big, thus making the scrollbars
// unnecessary
if ( !exact )
{
// add an extra bit to the sizes to avoid future updates
max.x -= WXLO_ROFFSET;
max.y -= WXLO_BOFFSET;
}
if ( m_hasHScrollbar && (max.x < m_maxx) )
{
// remove the horizontal scrollbar
SetScrollbars(0, -1, 0, -1, 0, -1, true);
m_hasHScrollbar = false;
}
if ( m_hasVScrollbar && (max.y < m_maxy) )
{
// remove the vertical scrollbar
SetScrollbars(-1, 0, -1, 0, -1, 0, true);
m_hasVScrollbar = false;
}
}
#endif
}
// ----------------------------------------------------------------------------
// clipboard operations
//
// ----------------------------------------------------------------------------
void
wxLayoutWindow::Paste(bool primary)
{
// Read some text
if (wxTheClipboard->Open())
{
if(primary)
wxTheClipboard->UsePrimarySelection();
wxLayoutDataObject wxldo;
if (wxTheClipboard->IsSupported( wxldo.GetFormat() ))
{
wxTheClipboard->GetData(wxldo);
// now we can access the data we had put into wxLayoutDataObject in
// wxLayoutList::GetSelection by calling its GetLayoutData() - the
// trouble is that I don't know what to do with it! (VZ)
}
else
{
wxTextDataObject data;
if (wxTheClipboard->IsSupported( data.GetFormat() ))
{
wxTheClipboard->GetData(data);
wxString text = data.GetText();
wxLayoutImportText( m_llist, text);
SetDirty();
}
}
wxTheClipboard->Close();
}
}
bool
wxLayoutWindow::Copy(bool invalidate)
{
// 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();
}
wxLayoutDataObject *wldo = new wxLayoutDataObject;
wxLayoutList *llist = m_llist->GetSelection(wldo, invalidate);
if(! llist)
return FALSE;
// Export selection as text:
wxString text;
wxLayoutExportObject *exp;
wxLayoutExportStatus status(llist);
while((exp = wxLayoutExport( &status, WXLO_EXPORT_AS_TEXT)) != NULL)
{
if(exp->type == WXLO_EXPORT_TEXT)
text << *(exp->content.text);
delete exp;
}
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);
}
if (wxTheClipboard->Open())
{
wxDataObjectComposite *dobj = new wxDataObjectComposite;
dobj->Add(new wxTextDataObject(text));
dobj->Add(wldo);
bool rc = wxTheClipboard->SetData(dobj);
wxTheClipboard->Close();
return rc;
}
return FALSE;
}
bool
wxLayoutWindow::Cut(void)
{
if(Copy(false)) // do not invalidate selection after copy
{
m_llist->DeleteSelection();
SetDirty();
return TRUE;
}
else
return FALSE;
}
// ----------------------------------------------------------------------------
// searching
// ----------------------------------------------------------------------------
#ifdef M_BASEDIR
bool
wxLayoutWindow::Find(const wxString &needle,
wxPoint * fromWhere,
const wxString &configPath)
{
wxPoint found;
if(needle.Length() == 0)
{
if( ! MInputBox(&m_FindString,
_("Find text"),
_(" Find:"),
this,
configPath, "")
|| strutil_isempty(m_FindString))
return true;
}
else
m_FindString = needle;
if(fromWhere == NULL)
found = m_llist->FindText(m_FindString, m_llist->GetCursorPos());
else
found = m_llist->FindText(m_FindString, *fromWhere);
if(found.x != -1)
{
if(fromWhere)
{
*fromWhere = found;
fromWhere->x ++;
}
m_llist->MoveCursorTo(found);
ScrollToCursor();
RequestUpdate();
return true;
}
return false;
}
bool
wxLayoutWindow::FindAgain(void)
{
bool rc = Find(m_FindString);
return rc;
}
#endif
// ----------------------------------------------------------------------------
// popup menu stuff
// ----------------------------------------------------------------------------
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, _("&Underline"),_("Underline mode."), true);
m->Append(WXLOWIN_MENU_BOLD, _("&Bold"),_("Bold mode."), true);
m->Append(WXLOWIN_MENU_ITALICS, _("&Italics"),_("Italics mode."), true);
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::OnUpdateMenuUnderline(wxUpdateUIEvent& event)
{
event.Check(m_llist->IsFontUnderlined());
}
void wxLayoutWindow::OnUpdateMenuBold(wxUpdateUIEvent& event)
{
event.Check(m_llist->IsFontBold());
}
void wxLayoutWindow::OnUpdateMenuItalic(wxUpdateUIEvent& event)
{
event.Check(m_llist->IsFontItalic());
}
void wxLayoutWindow::OnMenu(wxCommandEvent& event)
{
switch (event.GetId())
{
case WXLOWIN_MENU_LARGER:
m_llist->SetFontLarger(); RequestUpdate(); break;
case WXLOWIN_MENU_SMALLER:
m_llist->SetFontSmaller(); RequestUpdate(); break;
case WXLOWIN_MENU_UNDERLINE:
m_llist->ToggleFontUnderline(); RequestUpdate(); break;
case WXLOWIN_MENU_BOLD:
m_llist->ToggleFontWeight(); RequestUpdate(); break;
case WXLOWIN_MENU_ITALICS:
m_llist->ToggleFontItalics(); RequestUpdate(); break;
case WXLOWIN_MENU_ROMAN:
m_llist->SetFontFamily(wxROMAN); RequestUpdate(); break;
case WXLOWIN_MENU_TYPEWRITER:
m_llist->SetFontFamily(wxFIXED); RequestUpdate(); break;
case WXLOWIN_MENU_SANSSERIF:
m_llist->SetFontFamily(wxSWISS); RequestUpdate(); break;
}
}
// ----------------------------------------------------------------------------
// focus
// ----------------------------------------------------------------------------
void
wxLayoutWindow::OnSetFocus(wxFocusEvent &ev)
{
m_HaveFocus = true;
ev.Skip();
RequestUpdate(); // cursor must change
}
void
wxLayoutWindow::OnKillFocus(wxFocusEvent &ev)
{
m_HaveFocus = false;
ev.Skip();
RequestUpdate();// cursor must change
}
// ----------------------------------------------------------------------------
// private functions
// ----------------------------------------------------------------------------
static bool IsDirectionKey(long keyCode)
{
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:
return true;
default:
return false;
}
}
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