11c278c43c
Draw images with transparency, if any. See #13881. git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@70406 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
438 lines
11 KiB
C++
438 lines
11 KiB
C++
/////////////////////////////////////////////////////////////////////////////
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// Name: samples/docview/view.cpp
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// Purpose: View classes implementation
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// Author: Julian Smart
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// Modified by: Vadim Zeitlin: merge with the MDI version and general cleanup
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// Created: 04/01/98
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// RCS-ID: $Id$
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// Copyright: (c) 1998 Julian Smart
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// (c) 2008 Vadim Zeitlin
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// Licence: wxWindows licence
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/////////////////////////////////////////////////////////////////////////////
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// For compilers that support precompilation, includes "wx/wx.h".
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#include "wx/wxprec.h"
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#ifdef __BORLANDC__
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#pragma hdrstop
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#endif
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#ifndef WX_PRECOMP
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#include "wx/wx.h"
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#endif
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#if !wxUSE_DOC_VIEW_ARCHITECTURE
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#error You must set wxUSE_DOC_VIEW_ARCHITECTURE to 1 in setup.h!
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#endif
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#include "docview.h"
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#include "doc.h"
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#include "view.h"
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// ----------------------------------------------------------------------------
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// DrawingView implementation
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// ----------------------------------------------------------------------------
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IMPLEMENT_DYNAMIC_CLASS(DrawingView, wxView)
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BEGIN_EVENT_TABLE(DrawingView, wxView)
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EVT_MENU(wxID_CUT, DrawingView::OnCut)
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END_EVENT_TABLE()
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// What to do when a view is created. Creates actual
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// windows for displaying the view.
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bool DrawingView::OnCreate(wxDocument *doc, long flags)
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{
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if ( !wxView::OnCreate(doc, flags) )
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return false;
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MyApp& app = wxGetApp();
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if ( app.GetMode() != MyApp::Mode_Single )
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{
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// create a new window and canvas inside it
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wxFrame* frame = app.CreateChildFrame(this, true);
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wxASSERT(frame == GetFrame());
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m_canvas = new MyCanvas(this);
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frame->Show();
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}
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else // single document mode
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{
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// reuse the existing window and canvas
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m_canvas = app.GetMainWindowCanvas();
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m_canvas->SetView(this);
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// Initialize the edit menu Undo and Redo items
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doc->GetCommandProcessor()->SetEditMenu(app.GetMainWindowEditMenu());
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doc->GetCommandProcessor()->Initialize();
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}
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return true;
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}
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// Sneakily gets used for default print/preview as well as drawing on the
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// screen.
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void DrawingView::OnDraw(wxDC *dc)
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{
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dc->SetPen(*wxBLACK_PEN);
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// simply draw all lines of all segments
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const DoodleSegments& segments = GetDocument()->GetSegments();
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for ( DoodleSegments::const_iterator i = segments.begin();
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i != segments.end();
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++i )
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{
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const DoodleLines& lines = i->GetLines();
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for ( DoodleLines::const_iterator j = lines.begin();
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j != lines.end();
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++j )
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{
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const DoodleLine& line = *j;
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dc->DrawLine(line.x1, line.y1, line.x2, line.y2);
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}
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}
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}
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DrawingDocument* DrawingView::GetDocument()
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{
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return wxStaticCast(wxView::GetDocument(), DrawingDocument);
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}
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void DrawingView::OnUpdate(wxView* sender, wxObject* hint)
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{
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wxView::OnUpdate(sender, hint);
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if ( m_canvas )
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m_canvas->Refresh();
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}
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// Clean up windows used for displaying the view.
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bool DrawingView::OnClose(bool deleteWindow)
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{
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if ( !wxView::OnClose(deleteWindow) )
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return false;
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Activate(false);
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// Clear the canvas in single-window mode in which it stays alive
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if ( wxGetApp().GetMode() == MyApp::Mode_Single )
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{
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m_canvas->ClearBackground();
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m_canvas->ResetView();
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m_canvas = NULL;
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if (GetFrame())
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wxStaticCast(GetFrame(), wxFrame)->SetTitle(wxTheApp->GetAppDisplayName());
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}
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else // not single window mode
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{
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if ( deleteWindow )
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{
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GetFrame()->Destroy();
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SetFrame(NULL);
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}
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}
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return true;
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}
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void DrawingView::OnCut(wxCommandEvent& WXUNUSED(event) )
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{
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DrawingDocument * const doc = GetDocument();
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doc->GetCommandProcessor()->Submit(new DrawingRemoveSegmentCommand(doc));
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}
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// ----------------------------------------------------------------------------
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// TextEditView implementation
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// ----------------------------------------------------------------------------
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IMPLEMENT_DYNAMIC_CLASS(TextEditView, wxView)
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BEGIN_EVENT_TABLE(TextEditView, wxView)
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EVT_MENU(wxID_COPY, TextEditView::OnCopy)
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EVT_MENU(wxID_PASTE, TextEditView::OnPaste)
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EVT_MENU(wxID_SELECTALL, TextEditView::OnSelectAll)
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END_EVENT_TABLE()
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bool TextEditView::OnCreate(wxDocument *doc, long flags)
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{
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if ( !wxView::OnCreate(doc, flags) )
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return false;
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wxFrame* frame = wxGetApp().CreateChildFrame(this, false);
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wxASSERT(frame == GetFrame());
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m_text = new wxTextCtrl(frame, wxID_ANY, "",
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wxDefaultPosition, wxDefaultSize,
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wxTE_MULTILINE);
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frame->Show();
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return true;
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}
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void TextEditView::OnDraw(wxDC *WXUNUSED(dc))
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{
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// nothing to do here, wxTextCtrl draws itself
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}
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bool TextEditView::OnClose(bool deleteWindow)
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{
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if ( !wxView::OnClose(deleteWindow) )
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return false;
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Activate(false);
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if ( wxGetApp().GetMode() == MyApp::Mode_Single )
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{
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m_text->Clear();
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}
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else // not single window mode
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{
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if ( deleteWindow )
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{
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GetFrame()->Destroy();
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SetFrame(NULL);
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}
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}
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return true;
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}
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// ----------------------------------------------------------------------------
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// MyCanvas implementation
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// ----------------------------------------------------------------------------
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BEGIN_EVENT_TABLE(MyCanvas, wxScrolledWindow)
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EVT_MOUSE_EVENTS(MyCanvas::OnMouseEvent)
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END_EVENT_TABLE()
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// Define a constructor for my canvas
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MyCanvas::MyCanvas(wxView *view, wxWindow *parent)
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: wxScrolledWindow(parent ? parent : view->GetFrame())
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{
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m_view = view;
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m_currentSegment = NULL;
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m_lastMousePos = wxDefaultPosition;
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SetCursor(wxCursor(wxCURSOR_PENCIL));
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// this is completely arbitrary and is done just for illustration purposes
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SetVirtualSize(1000, 1000);
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SetScrollRate(20, 20);
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SetBackgroundColour(*wxWHITE);
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}
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MyCanvas::~MyCanvas()
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{
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delete m_currentSegment;
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}
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// Define the repainting behaviour
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void MyCanvas::OnDraw(wxDC& dc)
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{
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if ( m_view )
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m_view->OnDraw(& dc);
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}
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// This implements a tiny doodling program. Drag the mouse using the left
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// button.
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void MyCanvas::OnMouseEvent(wxMouseEvent& event)
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{
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if ( !m_view )
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return;
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wxClientDC dc(this);
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PrepareDC(dc);
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dc.SetPen(*wxBLACK_PEN);
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const wxPoint pt(event.GetLogicalPosition(dc));
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// is this the end of the current segment?
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if ( m_currentSegment && event.LeftUp() )
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{
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if ( !m_currentSegment->IsEmpty() )
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{
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// We've got a valid segment on mouse left up, so store it.
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DrawingDocument * const
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doc = wxStaticCast(m_view->GetDocument(), DrawingDocument);
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doc->GetCommandProcessor()->Submit(
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new DrawingAddSegmentCommand(doc, *m_currentSegment));
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doc->Modify(true);
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}
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wxDELETE(m_currentSegment);
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}
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// is this the start of a new segment?
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if ( m_lastMousePos != wxDefaultPosition && event.Dragging() )
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{
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if ( !m_currentSegment )
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m_currentSegment = new DoodleSegment;
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m_currentSegment->AddLine(m_lastMousePos, pt);
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dc.DrawLine(m_lastMousePos, pt);
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}
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m_lastMousePos = pt;
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}
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// ----------------------------------------------------------------------------
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// ImageCanvas implementation
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// ----------------------------------------------------------------------------
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// Define a constructor for my canvas
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ImageCanvas::ImageCanvas(wxView* view)
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: wxScrolledWindow(view->GetFrame())
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{
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m_view = view;
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SetScrollRate( 10, 10 );
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}
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// Define the repainting behaviour
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void ImageCanvas::OnDraw(wxDC& dc)
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{
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if ( m_view )
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m_view->OnDraw(& dc);
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}
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// ----------------------------------------------------------------------------
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// ImageView implementation
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// ----------------------------------------------------------------------------
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IMPLEMENT_DYNAMIC_CLASS(ImageView, wxView)
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ImageDocument* ImageView::GetDocument()
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{
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return wxStaticCast(wxView::GetDocument(), ImageDocument);
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}
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bool ImageView::OnCreate(wxDocument* doc, long flags)
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{
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if ( !wxView::OnCreate(doc, flags) )
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return false;
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wxFrame* frame = wxGetApp().CreateChildFrame(this, false);
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wxASSERT(frame == GetFrame());
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m_canvas = new ImageCanvas(this);
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frame->Show();
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return true;
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}
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void ImageView::OnUpdate(wxView* sender, wxObject* hint)
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{
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wxView::OnUpdate(sender, hint);
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wxImage image = GetDocument()->GetImage();
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if ( image.IsOk() )
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{
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m_canvas->SetVirtualSize(image.GetWidth(), image.GetHeight());
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}
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}
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void ImageView::OnDraw(wxDC* dc)
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{
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wxImage image = GetDocument()->GetImage();
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if ( image.IsOk() )
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{
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dc->DrawBitmap(wxBitmap(image), 0, 0, true /* use mask */);
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}
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}
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bool ImageView::OnClose(bool deleteWindow)
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{
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if ( !wxView::OnClose(deleteWindow) )
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return false;
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Activate(false);
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if ( wxGetApp().GetMode() == MyApp::Mode_Single )
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{
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GetDocument()->DeleteContents();
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}
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else // not single window mode
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{
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if ( deleteWindow )
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{
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GetFrame()->Destroy();
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SetFrame(NULL);
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}
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}
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return true;
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}
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// ----------------------------------------------------------------------------
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// ImageDetailsView
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// ----------------------------------------------------------------------------
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ImageDetailsView::ImageDetailsView(ImageDetailsDocument *doc)
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: wxView()
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{
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SetDocument(doc);
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m_frame = wxGetApp().CreateChildFrame(this, false);
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m_frame->SetTitle("Image Details");
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wxPanel * const panel = new wxPanel(m_frame);
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wxFlexGridSizer * const sizer = new wxFlexGridSizer(2, wxSize(5, 5));
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const wxSizerFlags
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flags = wxSizerFlags().Align(wxALIGN_CENTRE_VERTICAL).Border();
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sizer->Add(new wxStaticText(panel, wxID_ANY, "Image &file:"), flags);
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sizer->Add(new wxStaticText(panel, wxID_ANY, doc->GetFilename()), flags);
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sizer->Add(new wxStaticText(panel, wxID_ANY, "Image &type:"), flags);
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wxString typeStr;
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switch ( doc->GetType() )
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{
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case wxBITMAP_TYPE_PNG:
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typeStr = "PNG";
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break;
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case wxBITMAP_TYPE_JPEG:
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typeStr = "JPEG";
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break;
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default:
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typeStr = "Unknown";
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}
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sizer->Add(new wxStaticText(panel, wxID_ANY, typeStr), flags);
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sizer->Add(new wxStaticText(panel, wxID_ANY, "Image &size:"), flags);
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wxSize size = doc->GetSize();
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sizer->Add(new wxStaticText(panel, wxID_ANY,
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wxString::Format("%d*%d", size.x, size.y)),
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flags);
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sizer->Add(new wxStaticText(panel, wxID_ANY, "Number of unique &colours:"),
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flags);
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sizer->Add(new wxStaticText(panel, wxID_ANY,
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wxString::Format("%lu", doc->GetNumColours())),
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flags);
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sizer->Add(new wxStaticText(panel, wxID_ANY, "Uses &alpha:"), flags);
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sizer->Add(new wxStaticText(panel, wxID_ANY,
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doc->HasAlpha() ? "Yes" : "No"), flags);
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panel->SetSizer(sizer);
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m_frame->SetClientSize(panel->GetBestSize());
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m_frame->Show(true);
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}
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void ImageDetailsView::OnDraw(wxDC * WXUNUSED(dc))
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{
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// nothing to do here, we use controls to show our information
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}
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bool ImageDetailsView::OnClose(bool deleteWindow)
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{
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if ( wxGetApp().GetMode() != MyApp::Mode_Single && deleteWindow )
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{
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delete m_frame;
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m_frame = NULL;
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}
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return true;
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}
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