initial commit

Signed-off-by: Peter Siegmund <mars3142@noreply.mars3142.dev>

libs/wxWidgets-3.3.1/samples/docview/view.cpp

@@ -0,0 +1,433 @@
+/////////////////////////////////////////////////////////////////////////////
+// Name:        samples/docview/view.cpp
+// Purpose:     View classes implementation
+// Author:      Julian Smart
+// Modified by: Vadim Zeitlin: merge with the MDI version and general cleanup
+// Created:     04/01/98
+// Copyright:   (c) 1998 Julian Smart
+//              (c) 2008 Vadim Zeitlin
+// Licence:     wxWindows licence
+/////////////////////////////////////////////////////////////////////////////
+
+// For compilers that support precompilation, includes "wx/wx.h".
+#include "wx/wxprec.h"
+
+
+#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 "docview.h"
+#include "doc.h"
+#include "view.h"
+
+// ----------------------------------------------------------------------------
+// DrawingView implementation
+// ----------------------------------------------------------------------------
+
+wxIMPLEMENT_DYNAMIC_CLASS(DrawingView, wxView);
+
+wxBEGIN_EVENT_TABLE(DrawingView, wxView)
+    EVT_MENU(wxID_CUT, DrawingView::OnCut)
+wxEND_EVENT_TABLE()
+
+// What to do when a view is created. Creates actual
+// windows for displaying the view.
+bool DrawingView::OnCreate(wxDocument *doc, long flags)
+{
+    if ( !wxView::OnCreate(doc, flags) )
+        return false;
+
+    MyApp& app = wxGetApp();
+    if ( app.GetMode() != MyApp::Mode_Single )
+    {
+        // create a new window and canvas inside it
+        wxFrame* frame = app.CreateChildFrame(this, true);
+        wxASSERT(frame == GetFrame());
+        m_canvas = new MyCanvas(this);
+        frame->Show();
+    }
+    else // single document mode
+    {
+        // reuse the existing window and canvas
+        m_canvas = app.GetMainWindowCanvas();
+        m_canvas->SetView(this);
+
+        // Initialize the edit menu Undo and Redo items
+        doc->GetCommandProcessor()->SetEditMenu(app.GetMainWindowEditMenu());
+        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->SetPen(*wxBLACK_PEN);
+
+    // simply draw all lines of all segments
+    const DoodleSegments& segments = GetDocument()->GetSegments();
+    for ( DoodleSegments::const_iterator i = segments.begin();
+          i != segments.end();
+          ++i )
+    {
+        const DoodleLines& lines = i->GetLines();
+        for ( DoodleLines::const_iterator j = lines.begin();
+              j != lines.end();
+              ++j )
+        {
+            const DoodleLine& line = *j;
+
+            dc->DrawLine(line.x1, line.y1, line.x2, line.y2);
+        }
+    }
+}
+
+DrawingDocument* DrawingView::GetDocument()
+{
+    return wxStaticCast(wxView::GetDocument(), DrawingDocument);
+}
+
+void DrawingView::OnUpdate(wxView* sender, wxObject* hint)
+{
+    wxView::OnUpdate(sender, hint);
+    if ( m_canvas )
+        m_canvas->Refresh();
+}
+
+// Clean up windows used for displaying the view.
+bool DrawingView::OnClose(bool deleteWindow)
+{
+    if ( !wxView::OnClose(deleteWindow) )
+        return false;
+
+    Activate(false);
+
+    // Clear the canvas in single-window mode in which it stays alive
+    if ( wxGetApp().GetMode() == MyApp::Mode_Single )
+    {
+        m_canvas->ClearBackground();
+        m_canvas->ResetView();
+        m_canvas = nullptr;
+
+        if (GetFrame())
+            wxStaticCast(GetFrame(), wxFrame)->SetTitle(wxTheApp->GetAppDisplayName());
+    }
+    else // not single window mode
+    {
+        if ( deleteWindow )
+        {
+            GetFrame()->Destroy();
+            SetFrame(nullptr);
+        }
+    }
+    return true;
+}
+
+void DrawingView::OnCut(wxCommandEvent& WXUNUSED(event) )
+{
+    DrawingDocument * const doc = GetDocument();
+
+    doc->GetCommandProcessor()->Submit(new DrawingRemoveSegmentCommand(doc));
+}
+
+// ----------------------------------------------------------------------------
+// TextEditView implementation
+// ----------------------------------------------------------------------------
+
+wxIMPLEMENT_DYNAMIC_CLASS(TextEditView, wxView);
+
+wxBEGIN_EVENT_TABLE(TextEditView, wxView)
+    EVT_MENU(wxID_COPY, TextEditView::OnCopy)
+    EVT_MENU(wxID_PASTE, TextEditView::OnPaste)
+    EVT_MENU(wxID_SELECTALL, TextEditView::OnSelectAll)
+wxEND_EVENT_TABLE()
+
+bool TextEditView::OnCreate(wxDocument *doc, long flags)
+{
+    if ( !wxView::OnCreate(doc, flags) )
+        return false;
+
+    wxFrame* frame = wxGetApp().CreateChildFrame(this, false);
+    wxASSERT(frame == GetFrame());
+    m_text = new wxTextCtrl(frame, wxID_ANY, "",
+                            wxDefaultPosition, wxDefaultSize,
+                            wxTE_MULTILINE);
+    frame->Show();
+
+    return true;
+}
+
+void TextEditView::OnDraw(wxDC *WXUNUSED(dc))
+{
+    // nothing to do here, wxTextCtrl draws itself
+}
+
+bool TextEditView::OnClose(bool deleteWindow)
+{
+    if ( !wxView::OnClose(deleteWindow) )
+        return false;
+
+    Activate(false);
+
+    if ( wxGetApp().GetMode() == MyApp::Mode_Single )
+    {
+        m_text->Clear();
+    }
+    else // not single window mode
+    {
+        if ( deleteWindow )
+        {
+            GetFrame()->Destroy();
+            SetFrame(nullptr);
+        }
+    }
+    return true;
+}
+
+// ----------------------------------------------------------------------------
+// MyCanvas implementation
+// ----------------------------------------------------------------------------
+
+wxBEGIN_EVENT_TABLE(MyCanvas, wxScrolledWindow)
+    EVT_MOUSE_EVENTS(MyCanvas::OnMouseEvent)
+wxEND_EVENT_TABLE()
+
+// Define a constructor for my canvas
+MyCanvas::MyCanvas(wxView *view, wxWindow *parent)
+    : wxScrolledWindow(parent ? parent : view->GetFrame())
+{
+    m_view = view;
+    m_currentSegment = nullptr;
+    m_lastMousePos = wxDefaultPosition;
+
+    SetCursor(wxCursor(wxCURSOR_PENCIL));
+
+    // this is completely arbitrary and is done just for illustration purposes
+    SetVirtualSize(1000, 1000);
+    SetScrollRate(20, 20);
+
+    SetBackgroundColour(*wxWHITE);
+}
+
+MyCanvas::~MyCanvas()
+{
+    delete m_currentSegment;
+}
+
+// Define the repainting behaviour
+void MyCanvas::OnDraw(wxDC& dc)
+{
+    if ( m_view )
+        m_view->OnDraw(& dc);
+}
+
+// This implements a tiny doodling program. Drag the mouse using the left
+// button.
+void MyCanvas::OnMouseEvent(wxMouseEvent& event)
+{
+    if ( !m_view )
+        return;
+
+    wxClientDC dc(this);
+    PrepareDC(dc);
+
+    dc.SetPen(*wxBLACK_PEN);
+
+    const wxPoint pt(event.GetLogicalPosition(dc));
+
+    // is this the end of the current segment?
+    if ( m_currentSegment && event.LeftUp() )
+    {
+        if ( !m_currentSegment->IsEmpty() )
+        {
+            // We've got a valid segment on mouse left up, so store it.
+            DrawingDocument * const
+                doc = wxStaticCast(m_view->GetDocument(), DrawingDocument);
+
+            doc->GetCommandProcessor()->Submit(
+                new DrawingAddSegmentCommand(doc, *m_currentSegment));
+
+            doc->Modify(true);
+        }
+
+        wxDELETE(m_currentSegment);
+    }
+
+    // is this the start of a new segment?
+    if ( m_lastMousePos != wxDefaultPosition && event.Dragging() )
+    {
+        if ( !m_currentSegment )
+            m_currentSegment = new DoodleSegment;
+
+        m_currentSegment->AddLine(m_lastMousePos, pt);
+
+        dc.DrawLine(m_lastMousePos, pt);
+    }
+
+    m_lastMousePos = pt;
+}
+
+// ----------------------------------------------------------------------------
+// ImageCanvas implementation
+// ----------------------------------------------------------------------------
+
+// Define a constructor for my canvas
+ImageCanvas::ImageCanvas(wxView* view)
+    : wxScrolledWindow(view->GetFrame())
+{
+    m_view = view;
+    SetScrollRate( 10, 10 );
+}
+
+// Define the repainting behaviour
+void ImageCanvas::OnDraw(wxDC& dc)
+{
+    if ( m_view )
+        m_view->OnDraw(& dc);
+}
+
+// ----------------------------------------------------------------------------
+// ImageView implementation
+// ----------------------------------------------------------------------------
+
+wxIMPLEMENT_DYNAMIC_CLASS(ImageView, wxView);
+
+ImageDocument* ImageView::GetDocument()
+{
+    return wxStaticCast(wxView::GetDocument(), ImageDocument);
+}
+
+bool ImageView::OnCreate(wxDocument* doc, long flags)
+{
+    if ( !wxView::OnCreate(doc, flags) )
+        return false;
+
+    wxFrame* frame = wxGetApp().CreateChildFrame(this, false);
+    wxASSERT(frame == GetFrame());
+    m_canvas = new ImageCanvas(this);
+    frame->Show();
+
+    return true;
+}
+
+void ImageView::OnUpdate(wxView* sender, wxObject* hint)
+{
+    wxView::OnUpdate(sender, hint);
+    wxImage image = GetDocument()->GetImage();
+    if ( image.IsOk() )
+    {
+        m_canvas->SetVirtualSize(image.GetWidth(), image.GetHeight());
+    }
+}
+
+void ImageView::OnDraw(wxDC* dc)
+{
+    wxImage image = GetDocument()->GetImage();
+    if ( image.IsOk() )
+    {
+        dc->DrawBitmap(wxBitmap(image), 0, 0, true /* use mask */);
+    }
+}
+
+bool ImageView::OnClose(bool deleteWindow)
+{
+    if ( !wxView::OnClose(deleteWindow) )
+        return false;
+
+    Activate(false);
+
+    if ( wxGetApp().GetMode() == MyApp::Mode_Single )
+    {
+        GetDocument()->DeleteContents();
+    }
+    else // not single window mode
+    {
+        if ( deleteWindow )
+        {
+            GetFrame()->Destroy();
+            SetFrame(nullptr);
+        }
+    }
+    return true;
+}
+
+// ----------------------------------------------------------------------------
+// ImageDetailsView
+// ----------------------------------------------------------------------------
+
+ImageDetailsView::ImageDetailsView(ImageDetailsDocument *doc)
+                : wxView()
+{
+    SetDocument(doc);
+
+    m_frame = wxGetApp().CreateChildFrame(this, false);
+    m_frame->SetTitle("Image Details");
+
+    wxPanel * const panel = new wxPanel(m_frame);
+    wxFlexGridSizer * const sizer = new wxFlexGridSizer(2, wxSize(5, 5));
+    const wxSizerFlags
+        flags = wxSizerFlags().Align(wxALIGN_CENTRE_VERTICAL).Border();
+
+    sizer->Add(new wxStaticText(panel, wxID_ANY, "Image &file:"), flags);
+    sizer->Add(new wxStaticText(panel, wxID_ANY, doc->GetFilename()), flags);
+
+    sizer->Add(new wxStaticText(panel, wxID_ANY, "Image &type:"), flags);
+    wxString typeStr;
+    switch ( doc->GetType() )
+    {
+        case wxBITMAP_TYPE_PNG:
+            typeStr = "PNG";
+            break;
+
+        case wxBITMAP_TYPE_JPEG:
+            typeStr = "JPEG";
+            break;
+
+        default:
+            typeStr = "Unknown";
+    }
+    sizer->Add(new wxStaticText(panel, wxID_ANY, typeStr), flags);
+
+    sizer->Add(new wxStaticText(panel, wxID_ANY, "Image &size:"), flags);
+    wxSize size = doc->GetSize();
+    sizer->Add(new wxStaticText(panel, wxID_ANY,
+                                wxString::Format("%d*%d", size.x, size.y)),
+               flags);
+
+    sizer->Add(new wxStaticText(panel, wxID_ANY, "Number of unique &colours:"),
+               flags);
+    sizer->Add(new wxStaticText(panel, wxID_ANY,
+                                wxString::Format("%lu", doc->GetNumColours())),
+               flags);
+
+    sizer->Add(new wxStaticText(panel, wxID_ANY, "Uses &alpha:"), flags);
+    sizer->Add(new wxStaticText(panel, wxID_ANY,
+                                doc->HasAlpha() ? "Yes" : "No"), flags);
+
+    panel->SetSizer(sizer);
+    m_frame->SetClientSize(panel->GetBestSize());
+    m_frame->Show(true);
+}
+
+void ImageDetailsView::OnDraw(wxDC * WXUNUSED(dc))
+{
+    // nothing to do here, we use controls to show our information
+}
+
+bool ImageDetailsView::OnClose(bool deleteWindow)
+{
+    if ( wxGetApp().GetMode() != MyApp::Mode_Single && deleteWindow )
+    {
+        delete m_frame;
+        m_frame = nullptr;
+    }
+
+    return true;
+}