wxWidgets/samples/docview/view.cpp

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/////////////////////////////////////////////////////////////////////////////
// Name: view.cpp
// Purpose: View classes
// 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 !USE_DOC_VIEW_ARCHITECTURE
#error You must set USE_DOC_VIEW_ARCHITECTURE to 1 in wx_setup.h!
#endif
#include "docview.h"
#include "doc.h"
#include "view.h"
IMPLEMENT_DYNAMIC_CLASS(DrawingView, wxView)
// For drawing lines in a canvas
float xpos = -1;
float ypos = -1;
BEGIN_EVENT_TABLE(DrawingView, wxView)
EVT_MENU(DOODLE_CUT, DrawingView::OnCut)
END_EVENT_TABLE()
// What to do when a view is created. Creates actual
// windows for displaying the view.
bool DrawingView::OnCreate(wxDocument *doc, long WXUNUSED(flags) )
{
if (!singleWindowMode)
{
// Multiple windows
frame = wxGetApp().CreateChildFrame(doc, this, TRUE);
frame->SetTitle("DrawingView");
canvas = GetMainFrame()->CreateCanvas(this, frame);
#ifdef __X__
// X seems to require a forced resize
int x, y;
frame->GetSize(&x, &y);
frame->SetSize(x, y);
#endif
frame->Show(TRUE);
}
else
{
// Single-window mode
frame = GetMainFrame();
canvas = GetMainFrame()->canvas;
canvas->view = this;
// Associate the appropriate frame with this view.
SetFrame(frame);
// Make sure the document manager knows that this is the
// current view.
Activate(TRUE);
// Initialize the edit menu Undo and Redo items
doc->GetCommandProcessor()->SetEditMenu(((MyFrame *)frame)->editMenu);
doc->GetCommandProcessor()->Initialize();
}
return TRUE;
}
// Sneakily gets used for default print/preview
// as well as drawing on the screen.
void DrawingView::OnDraw(wxDC *dc)
{
dc->SetFont(*wxNORMAL_FONT);
dc->SetPen(*wxBLACK_PEN);
wxNode *node = ((DrawingDocument *)GetDocument())->GetDoodleSegments().First();
while (node)
{
DoodleSegment *seg = (DoodleSegment *)node->Data();
seg->Draw(dc);
node = node->Next();
}
}
void DrawingView::OnUpdate(wxView *WXUNUSED(sender), wxObject *WXUNUSED(hint))
{
if (canvas)
canvas->Refresh();
/* Is the following necessary?
#ifdef __WXMSW__
if (canvas)
canvas->Refresh();
#else
if (canvas)
{
wxClientDC dc(canvas);
dc.Clear();
OnDraw(& dc);
}
#endif
*/
}
// Clean up windows used for displaying the view.
bool DrawingView::OnClose(bool deleteWindow)
{
if (!GetDocument()->Close())
return FALSE;
// Clear the canvas in case we're in single-window mode,
// and the canvas stays.
canvas->Clear();
canvas->view = NULL;
canvas = NULL;
wxString s(wxTheApp->GetAppName());
if (frame)
frame->SetTitle(s);
SetFrame(NULL);
Activate(FALSE);
if (deleteWindow && !singleWindowMode)
{
delete frame;
return TRUE;
}
return TRUE;
}
void DrawingView::OnCut(wxCommandEvent& WXUNUSED(event) )
{
DrawingDocument *doc = (DrawingDocument *)GetDocument();
doc->GetCommandProcessor()->Submit(new DrawingCommand("Cut Last Segment", DOODLE_CUT, doc, NULL));
}
IMPLEMENT_DYNAMIC_CLASS(TextEditView, wxView)
bool TextEditView::OnCreate(wxDocument *doc, long WXUNUSED(flags) )
{
frame = wxGetApp().CreateChildFrame(doc, this, FALSE);
int width, height;
frame->GetClientSize(&width, &height);
textsw = new MyTextWindow(this, frame, wxPoint(0, 0), wxSize(width, height), wxTE_MULTILINE);
frame->SetTitle("TextEditView");
#ifdef __X__
// X seems to require a forced resize
int x, y;
frame->GetSize(&x, &y);
frame->SetSize(x, y);
#endif
frame->Show(TRUE);
Activate(TRUE);
return TRUE;
}
// Handled by wxTextWindow
void TextEditView::OnDraw(wxDC *WXUNUSED(dc) )
{
}
void TextEditView::OnUpdate(wxView *WXUNUSED(sender), wxObject *WXUNUSED(hint) )
{
}
bool TextEditView::OnClose(bool deleteWindow)
{
if (!GetDocument()->Close())
return FALSE;
Activate(FALSE);
if (deleteWindow)
{
delete frame;
return TRUE;
}
return TRUE;
}
/*
* Window implementations
*/
BEGIN_EVENT_TABLE(MyCanvas, wxScrolledWindow)
EVT_MOUSE_EVENTS(MyCanvas::OnMouseEvent)
END_EVENT_TABLE()
// Define a constructor for my canvas
MyCanvas::MyCanvas(wxView *v, wxFrame *frame, const wxPoint& pos, const wxSize& size, const long style):
wxScrolledWindow(frame, -1, pos, size, style)
{
view = v;
}
// Define the repainting behaviour
void MyCanvas::OnDraw(wxDC& dc)
{
if (view)
view->OnDraw(& dc);
}
// This implements a tiny doodling program. Drag the mouse using
// the left button.
void MyCanvas::OnMouseEvent(wxMouseEvent& event)
{
if (!view)
return;
static DoodleSegment *currentSegment = NULL;
wxClientDC dc(this);
PrepareDC(dc);
dc.SetPen(*wxBLACK_PEN);
wxPoint pt(event.GetLogicalPosition(dc));
if (currentSegment && event.LeftUp())
{
if (currentSegment->lines.Number() == 0)
{
delete currentSegment;
currentSegment = NULL;
}
else
{
// We've got a valid segment on mouse left up, so store it.
DrawingDocument *doc = (DrawingDocument *)view->GetDocument();
doc->GetCommandProcessor()->Submit(new DrawingCommand("Add Segment", DOODLE_ADD, doc, currentSegment));
view->GetDocument()->Modify(TRUE);
currentSegment = NULL;
}
}
if (xpos > -1 && ypos > -1 && event.Dragging())
{
if (!currentSegment)
currentSegment = new DoodleSegment;
DoodleLine *newLine = new DoodleLine;
newLine->x1 = (long)xpos;
newLine->y1 = (long)ypos;
newLine->x2 = pt.x;
newLine->y2 = pt.y;
currentSegment->lines.Append(newLine);
dc.DrawLine( (long)xpos, (long)ypos, pt.x, pt.y);
}
xpos = pt.x;
ypos = pt.y;
}
// Define a constructor for my text subwindow
MyTextWindow::MyTextWindow(wxView *v, wxFrame *frame, const wxPoint& pos, const wxSize& size, const long style):
wxTextCtrl(frame, -1, "", pos, size, style)
{
view = v;
}