view.cpp

wxGTK 是 wxWidgets 的 linux GTK+ (>2.2.3)版本。wxWidgets 是一个跨平台的 GUI 框架

/////////////////////////////////////////////////////////////////////////////
// Name:        contrib/samples/ogl/studio/view.cpp
// Purpose:     Implements view functionality
// Author:      Julian Smart
// Modified by:
// Created:     12/07/98
// RCS-ID:      $Id: view.cpp,v 1.13 2006/02/10 11:59:49 ABX Exp $
// Copyright:   (c) Julian Smart
// Licence:     wxWindows licence
/////////////////////////////////////////////////////////////////////////////

// For compilers that support precompilation, includes "wx.h".
#include "wx/wxprec.h"

#ifdef __BORLANDC__
#pragma hdrstop
#endif

#ifndef WX_PRECOMP
#include "wx/wx.h"
#endif

#include "wx/colordlg.h"

#if !wxUSE_DOC_VIEW_ARCHITECTURE
#error You must set wxUSE_DOC_VIEW_ARCHITECTURE to 1 in wx_setup.h!
#endif

#include "studio.h"
#include "doc.h"
#include "view.h"
#include "cspalette.h"
#include "symbols.h"
#include "dialogs.h"
#include "wx/ogl/basicp.h"
#include "wx/ogl/linesp.h"

IMPLEMENT_DYNAMIC_CLASS(csDiagramView, wxView)

BEGIN_EVENT_TABLE(csDiagramView, wxView)
    EVT_MENU(wxID_CUT, csDiagramView::OnCut)
    EVT_MENU(wxID_COPY, csDiagramView::OnCopy)
    EVT_MENU(wxID_CLEAR, csDiagramView::OnClear)
    EVT_MENU(wxID_PASTE, csDiagramView::OnPaste)
    EVT_MENU(wxID_DUPLICATE, csDiagramView::OnDuplicate)
    EVT_MENU(ID_CS_CHANGE_BACKGROUND_COLOUR, csDiagramView::OnChangeBackgroundColour)
    EVT_MENU(ID_CS_EDIT_PROPERTIES, csDiagramView::OnEditProperties)
    EVT_MENU(ID_CS_SELECT_ALL, csDiagramView::OnSelectAll)
    EVT_TOOL(DIAGRAM_TOOLBAR_LINE_ARROW, csDiagramView::OnToggleArrowTool)
    EVT_COMBOBOX(ID_WINDOW_POINT_SIZE_COMBOBOX, csDiagramView::OnPointSizeComboSel)
    EVT_COMBOBOX(ID_WINDOW_ZOOM_COMBOBOX, csDiagramView::OnZoomSel)
    EVT_TEXT(ID_WINDOW_POINT_SIZE_COMBOBOX, csDiagramView::OnPointSizeComboText)
    EVT_TOOL(DIAGRAM_TOOLBAR_ALIGNL, csDiagramView::OnAlign)
    EVT_TOOL(DIAGRAM_TOOLBAR_ALIGNR, csDiagramView::OnAlign)
    EVT_TOOL(DIAGRAM_TOOLBAR_ALIGNB, csDiagramView::OnAlign)
    EVT_TOOL(DIAGRAM_TOOLBAR_ALIGNT, csDiagramView::OnAlign)
    EVT_TOOL(DIAGRAM_TOOLBAR_ALIGN_HORIZ, csDiagramView::OnAlign)
    EVT_TOOL(DIAGRAM_TOOLBAR_ALIGN_VERT, csDiagramView::OnAlign)
    EVT_TOOL(DIAGRAM_TOOLBAR_COPY_SIZE, csDiagramView::OnAlign)
    EVT_TOOL(DIAGRAM_TOOLBAR_NEW_POINT, csDiagramView::OnNewLinePoint)
    EVT_TOOL(DIAGRAM_TOOLBAR_CUT_POINT, csDiagramView::OnCutLinePoint)
    EVT_TOOL(DIAGRAM_TOOLBAR_STRAIGHTEN, csDiagramView::OnStraightenLines)
    EVT_UPDATE_UI(DIAGRAM_TOOLBAR_ALIGNL, csDiagramView::OnAlignUpdate)
    EVT_UPDATE_UI(DIAGRAM_TOOLBAR_ALIGNR, csDiagramView::OnAlignUpdate)
    EVT_UPDATE_UI(DIAGRAM_TOOLBAR_ALIGNB, csDiagramView::OnAlignUpdate)
    EVT_UPDATE_UI(DIAGRAM_TOOLBAR_ALIGNT, csDiagramView::OnAlignUpdate)
    EVT_UPDATE_UI(DIAGRAM_TOOLBAR_ALIGN_HORIZ, csDiagramView::OnAlignUpdate)
    EVT_UPDATE_UI(DIAGRAM_TOOLBAR_ALIGN_VERT, csDiagramView::OnAlignUpdate)
    EVT_UPDATE_UI(DIAGRAM_TOOLBAR_COPY_SIZE, csDiagramView::OnAlignUpdate)
    EVT_UPDATE_UI(DIAGRAM_TOOLBAR_NEW_POINT, csDiagramView::OnNewLinePointUpdate)
    EVT_UPDATE_UI(DIAGRAM_TOOLBAR_CUT_POINT, csDiagramView::OnCutLinePointUpdate)
    EVT_UPDATE_UI(DIAGRAM_TOOLBAR_STRAIGHTEN, csDiagramView::OnStraightenLinesUpdate)
    EVT_UPDATE_UI(DIAGRAM_TOOLBAR_LINE_ARROW, csDiagramView::OnToggleArrowToolUpdate)
    EVT_UPDATE_UI(wxID_CUT, csDiagramView::OnCutUpdate)
    EVT_UPDATE_UI(wxID_COPY, csDiagramView::OnCopyUpdate)
    EVT_UPDATE_UI(wxID_CLEAR, csDiagramView::OnClearUpdate)
    EVT_UPDATE_UI(wxID_PASTE, csDiagramView::OnPasteUpdate)
    EVT_UPDATE_UI(wxID_DUPLICATE, csDiagramView::OnDuplicateUpdate)
    EVT_UPDATE_UI(ID_CS_EDIT_PROPERTIES, csDiagramView::OnEditPropertiesUpdate)
    EVT_UPDATE_UI(wxID_UNDO, csDiagramView::OnUndoUpdate)
    EVT_UPDATE_UI(wxID_REDO, csDiagramView::OnRedoUpdate)
END_EVENT_TABLE()

// What to do when a view is created. Creates actual
// windows for displaying the view.
bool csDiagramView::OnCreate(wxDocument *doc, long WXUNUSED(flags))
{
  wxMenu* editMenu;
  frame = wxGetApp().CreateChildFrame(doc, this, &editMenu);
  canvas = wxGetApp().CreateCanvas(this, frame);
  canvas->SetView(this);

  SetFrame(frame);
  Activate(true);

  // Initialize the edit menu Undo and Redo items
  doc->GetCommandProcessor()->SetEditMenu(editMenu);
  doc->GetCommandProcessor()->Initialize();

  wxShapeCanvas *shapeCanvas = (wxShapeCanvas *)canvas;
  csDiagramDocument *diagramDoc = (csDiagramDocument *)doc;
  shapeCanvas->SetDiagram(diagramDoc->GetDiagram());
  diagramDoc->GetDiagram()->SetCanvas(shapeCanvas);

  diagramDoc->GetDiagram()->SetGridSpacing((double) wxGetApp().GetGridSpacing());

    switch (wxGetApp().GetGridStyle())
    {
        case csGRID_STYLE_NONE:
        {
            diagramDoc->GetDiagram()->SetSnapToGrid(false);
            break;
        }
        case csGRID_STYLE_INVISIBLE:
        {
            diagramDoc->GetDiagram()->SetSnapToGrid(true);
            break;
        }
        case csGRID_STYLE_DOTTED:
        {
            // TODO (not implemented in OGL)
            break;
        }
    }


  return true;
}

csDiagramView::~csDiagramView(void)
{
    if (frame)
    {
        ((wxDocMDIChildFrame*)frame)->SetView(NULL);
    }
}

// Sneakily gets used for default print/preview
// as well as drawing on the screen.
void csDiagramView::OnDraw(wxDC *WXUNUSED(dc))
{
}

void csDiagramView::OnUpdate(wxView *WXUNUSED(sender), wxObject *WXUNUSED(hint))
{
  if (canvas)
    canvas->Refresh();
}

// Clean up windows used for displaying the view.
bool csDiagramView::OnClose(bool deleteWindow)
{
  if (!GetDocument()->Close())
    return false;

  csDiagramDocument *diagramDoc = (csDiagramDocument *)GetDocument();
  diagramDoc->GetDiagram()->SetCanvas(NULL);

  canvas->ClearBackground();
  canvas->SetDiagram(NULL);
  canvas->SetView(NULL);
  canvas = NULL;

  wxMenu* fileMenu = frame->GetMenuBar()->GetMenu(0);

  // Remove file menu from those managed by the command history
  wxGetApp().GetDocManager()->FileHistoryRemoveMenu(fileMenu);

  Activate(false);
  frame->Show(false);

  if (deleteWindow)
  {
    frame->Destroy();
  }

  return true;
}

// Adds or removes shape from m_selections
void csDiagramView::SelectShape(wxShape* shape, bool select)
{
    if (select && !m_selections.Member(shape))
        m_selections.Append(shape);
    else if (!select)
        m_selections.DeleteObject(shape);
}

void csDiagramView::OnSelectAll(wxCommandEvent& WXUNUSED(event))
{
    SelectAll(true);
}

wxShape *csDiagramView::FindFirstSelectedShape(void)
{
  csDiagramDocument *doc = (csDiagramDocument *)GetDocument();
  wxObjectList::compatibility_iterator node = doc->GetDiagram()->GetShapeList()->GetFirst();
  while (node)
  {
    wxShape *eachShape = (wxShape *)node->GetData();
    if ((eachShape->GetParent() == NULL) && !eachShape->IsKindOf(CLASSINFO(wxLabelShape)) && eachShape->Selected())
    {
      return eachShape;
    }
    else node = node->GetNext();
  }
  return NULL;
}

void csDiagramView::FindSelectedShapes(wxList& selections, wxClassInfo* toFind)
{
  csDiagramDocument *doc = (csDiagramDocument *)GetDocument();
  wxObjectList::compatibility_iterator node = doc->GetDiagram()->GetShapeList()->GetFirst();
  while (node)
  {
    wxShape *eachShape = (wxShape *)node->GetData();
    if ((eachShape->GetParent() == NULL) && !eachShape->IsKindOf(CLASSINFO(wxLabelShape)) && eachShape->Selected() && ((toFind == NULL) || (eachShape->IsKindOf(toFind))))
    {
      selections.Append(eachShape);
    }
    node = node->GetNext();
  }
}

void csDiagramView::OnUndoUpdate(wxUpdateUIEvent& event)
{
    csDiagramDocument *doc = (csDiagramDocument *)GetDocument();
    event.Enable(doc->GetCommandProcessor()->CanUndo());
}

void csDiagramView::OnRedoUpdate(wxUpdateUIEvent& event)
{
    csDiagramDocument *doc = (csDiagramDocument *)GetDocument();
    event.Enable(doc->GetCommandProcessor()->CanRedo());
}

void csDiagramView::OnCut(wxCommandEvent& WXUNUSED(event))
{
    csDiagramDocument *doc = (csDiagramDocument *)GetDocument();

    // Copy the shapes to the clipboard
    wxGetApp().GetDiagramClipboard().Copy(doc->GetDiagram());

    wxList selections;
    FindSelectedShapes(selections);

    DoCut(selections);
}

void csDiagramView::OnClear(wxCommandEvent& WXUNUSED(event))
{
    wxList selections;
    FindSelectedShapes(selections);

    DoCut(selections);
}

void csDiagramView::OnCopy(wxCommandEvent& WXUNUSED(event))
{
    csDiagramDocument *doc = (csDiagramDocument *)GetDocument();

    // Copy the shapes to the clipboard
    if (wxGetApp().GetDiagramClipboard().Copy(doc->GetDiagram()))
    {
#ifdef __WXMSW__
        // Copy to the Windows clipboard
        wxGetApp().GetDiagramClipboard().CopyToClipboard(1.0);
#endif
    }
}

void csDiagramView::OnPaste(wxCommandEvent& WXUNUSED(event))
{
    csDiagramDocument *doc = (csDiagramDocument *)GetDocument();

    wxGetApp().GetDiagramClipboard().Paste(doc->GetDiagram());
}

void csDiagramView::OnDuplicate(wxCommandEvent& WXUNUSED(event))
{
    csDiagramDocument *doc = (csDiagramDocument *)GetDocument();

    // Do a copy, then a paste
    wxGetApp().GetDiagramClipboard().Copy(doc->GetDiagram());

    // Apply an offset. Really, this offset should keep being incremented,
    // but where do we reset it again?
    wxGetApp().GetDiagramClipboard().Paste(doc->GetDiagram(), NULL, 20, 20);
}

void csDiagramView::OnCutUpdate(wxUpdateUIEvent& event)
{
    event.Enable( (m_selections.GetCount() > 0) );
}

void csDiagramView::OnClearUpdate(wxUpdateUIEvent& event)
{
    event.Enable( (m_selections.GetCount() > 0) );
}

void csDiagramView::OnCopyUpdate(wxUpdateUIEvent& event)
{
    event.Enable( (m_selections.GetCount() > 0) );
}

void csDiagramView::OnPasteUpdate(wxUpdateUIEvent& event)
{
    int n = wxGetApp().GetDiagramClipboard().GetCount();

    event.Enable( (n > 0) );
}

void csDiagramView::OnDuplicateUpdate(wxUpdateUIEvent& event)
{
    event.Enable( (m_selections.GetCount() > 0) );
}

void csDiagramView::DoCut(wxList& shapes)
{
    csDiagramDocument *doc = (csDiagramDocument *)GetDocument();

    if (shapes.GetCount() > 0)
    {
        csDiagramCommand* cmd = new csDiagramCommand(_T("Cut"), doc);

        wxObjectList::compatibility_iterator node = shapes.GetFirst();
        while (node)
        {
            wxShape *theShape = (wxShape*) node->GetData();
            csCommandState* state = new csCommandState(ID_CS_CUT, NULL, theShape);

            // Insert lines at the front, so they are cut first.
            // Otherwise we may try to remove a shape with a line still
            // attached.
            if (theShape->IsKindOf(CLASSINFO(wxLineShape)))
                cmd->InsertState(state);
            else
                cmd->AddState(state);

            node = node->GetNext();
        }
        cmd->RemoveLines(); // Schedule any connected lines, not already mentioned,
                            // to be removed first

        doc->GetCommandProcessor()->Submit(cmd);
    }
}