wxWidgets/samples/docview/doc.cpp

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/////////////////////////////////////////////////////////////////////////////
// Name: doc.cpp
// Purpose: Implements document functionality
// Author: Julian Smart
// Modified by:
// Created: 04/01/98
// RCS-ID: $Id$
// Copyright: (c) Julian Smart and Markus Holzem
// Licence: wxWindows license
/////////////////////////////////////////////////////////////////////////////
#ifdef __GNUG__
// #pragma implementation
#endif
// For compilers that support precompilation, includes "wx/wx.h".
#include "wx/wxprec.h"
#ifdef __BORLANDC__
#pragma hdrstop
#endif
#ifndef WX_PRECOMP
#include "wx/wx.h"
#endif
#if !wxUSE_DOC_VIEW_ARCHITECTURE
#error You must set wxUSE_DOC_VIEW_ARCHITECTURE to 1 in setup.h!
#endif
#include "doc.h"
#include "view.h"
IMPLEMENT_DYNAMIC_CLASS(DrawingDocument, wxDocument)
DrawingDocument::DrawingDocument(void)
{
}
DrawingDocument::~DrawingDocument(void)
{
doodleSegments.DeleteContents(TRUE);
}
ostream& DrawingDocument::SaveObject(ostream& stream)
{
wxDocument::SaveObject(stream);
stream << doodleSegments.Number() << '\n';
wxNode *node = doodleSegments.First();
while (node)
{
DoodleSegment *segment = (DoodleSegment *)node->Data();
segment->SaveObject(stream);
stream << '\n';
node = node->Next();
}
return stream;
}
istream& DrawingDocument::LoadObject(istream& stream)
{
wxDocument::LoadObject(stream);
int n = 0;
stream >> n;
for (int i = 0; i < n; i++)
{
DoodleSegment *segment = new DoodleSegment;
segment->LoadObject(stream);
doodleSegments.Append(segment);
}
return stream;
}
DoodleSegment::DoodleSegment(void)
{
}
DoodleSegment::DoodleSegment(DoodleSegment& seg)
{
wxNode *node = seg.lines.First();
while (node)
{
DoodleLine *line = (DoodleLine *)node->Data();
DoodleLine *newLine = new DoodleLine;
newLine->x1 = line->x1;
newLine->y1 = line->y1;
newLine->x2 = line->x2;
newLine->y2 = line->y2;
lines.Append(newLine);
node = node->Next();
}
}
DoodleSegment::~DoodleSegment(void)
{
lines.DeleteContents(TRUE);
}
ostream& DoodleSegment::SaveObject(ostream& stream)
{
stream << lines.Number() << '\n';
wxNode *node = lines.First();
while (node)
{
DoodleLine *line = (DoodleLine *)node->Data();
stream << line->x1 << " " << line->y1 << " " << line->x2 << " " << line->y2 << "\n";
node = node->Next();
}
return stream;
}
istream& DoodleSegment::LoadObject(istream& stream)
{
int n = 0;
stream >> n;
for (int i = 0; i < n; i++)
{
DoodleLine *line = new DoodleLine;
stream >> line->x1 >> line->y1 >> line->x2 >> line->y2;
lines.Append(line);
}
return stream;
}
void DoodleSegment::Draw(wxDC *dc)
{
wxNode *node = lines.First();
while (node)
{
DoodleLine *line = (DoodleLine *)node->Data();
dc->DrawLine(line->x1, line->y1, line->x2, line->y2);
node = node->Next();
}
}
/*
* Implementation of drawing command
*/
DrawingCommand::DrawingCommand(const wxString& name, int command, DrawingDocument *ddoc, DoodleSegment *seg):
wxCommand(TRUE, name)
{
doc = ddoc;
segment = seg;
cmd = command;
}
DrawingCommand::~DrawingCommand(void)
{
if (segment)
delete segment;
}
bool DrawingCommand::Do(void)
{
switch (cmd)
{
case DOODLE_CUT:
{
// Cut the last segment
if (doc->GetDoodleSegments().Number() > 0)
{
wxNode *node = doc->GetDoodleSegments().Last();
if (segment)
delete segment;
segment = (DoodleSegment *)node->Data();
delete node;
doc->Modify(TRUE);
doc->UpdateAllViews();
}
break;
}
case DOODLE_ADD:
{
doc->GetDoodleSegments().Append(new DoodleSegment(*segment));
doc->Modify(TRUE);
doc->UpdateAllViews();
break;
}
}
return TRUE;
}
bool DrawingCommand::Undo(void)
{
switch (cmd)
{
case DOODLE_CUT:
{
// Paste the segment
if (segment)
{
doc->GetDoodleSegments().Append(segment);
doc->Modify(TRUE);
doc->UpdateAllViews();
segment = (DoodleSegment *) NULL;
}
doc->Modify(TRUE);
doc->UpdateAllViews();
break;
}
case DOODLE_ADD:
{
// Cut the last segment
if (doc->GetDoodleSegments().Number() > 0)
{
wxNode *node = doc->GetDoodleSegments().Last();
DoodleSegment *seg = (DoodleSegment *)node->Data();
delete seg;
delete node;
doc->Modify(TRUE);
doc->UpdateAllViews();
}
}
}
return TRUE;
}
IMPLEMENT_DYNAMIC_CLASS(TextEditDocument, wxDocument)
// Since text windows have their own method for saving to/loading from files,
// we override OnSave/OpenDocument instead of Save/LoadObject
bool TextEditDocument::OnSaveDocument(const wxString& filename)
{
TextEditView *view = (TextEditView *)GetFirstView();
if (!view->textsw->SaveFile(filename))
return FALSE;
Modify(FALSE);
return TRUE;
}
bool TextEditDocument::OnOpenDocument(const wxString& filename)
{
TextEditView *view = (TextEditView *)GetFirstView();
if (!view->textsw->LoadFile(filename))
return FALSE;
SetFilename(filename, TRUE);
Modify(FALSE);
UpdateAllViews();
return TRUE;
}
bool TextEditDocument::IsModified(void) const
{
TextEditView *view = (TextEditView *)GetFirstView();
if (view)
{
return (wxDocument::IsModified() || view->textsw->IsModified());
}
else
return wxDocument::IsModified();
}
void TextEditDocument::Modify(bool mod)
{
TextEditView *view = (TextEditView *)GetFirstView();
wxDocument::Modify(mod);
if (!mod && view && view->textsw)
view->textsw->DiscardEdits();
}