Canvas::Canvas(QWidget *parent) :
QWidget(parent),
canvasSize(3240,2160),
// canvasSize(720,480),
image(canvasSize),
layerNameCounter(0),
historySize_(0)
{
setAttribute(Qt::WA_StaticContents);
setBaseSize(canvasSize);
inPicker = false;
drawing = false;
opacity = 1.0;
brush_ = BrushPointer(new Brush);
changeBrush("pencilButton");
updateCursor(brush_->width());
setMouseTracking(true);
this->resize(canvasSize);
genUserid();
}
void MyApp::Draw(wxDC&dc)
{
// This routine just draws a bunch of random stuff on the screen so that we
// can check that different types of object are being drawn consistently
// between the screen image, the print preview image (at various zoom
// levels), and the printed page.
dc.SetBackground(*wxWHITE_BRUSH);
// dc.Clear();
dc.SetFont(m_testFont);
// dc.SetBackgroundMode(wxTRANSPARENT);
dc.SetPen(*wxBLACK_PEN);
dc.SetBrush(*wxLIGHT_GREY_BRUSH);
dc.DrawRectangle(0, 0, 230, 350);
dc.DrawLine(0, 0, 229, 349);
dc.DrawLine(229, 0, 0, 349);
dc.SetBrush(*wxTRANSPARENT_BRUSH);
dc.SetBrush(*wxCYAN_BRUSH);
dc.SetPen(*wxRED_PEN);
dc.DrawRoundedRectangle(0, 20, 200, 80, 20);
dc.DrawText( wxT("Rectangle 200 by 80"), 40, 40);
dc.SetPen( wxPen(*wxBLACK, 0, wxPENSTYLE_DOT_DASH) );
dc.DrawEllipse(50, 140, 100, 50);
dc.SetPen(*wxRED_PEN);
dc.DrawText( wxT("Test message: this is in 10 point text"), 10, 180);
#if wxUSE_UNICODE
const char *test = "Hebrew שלום -- Japanese (日本語)";
wxString tmp = wxConvUTF8.cMB2WC( test );
dc.DrawText( tmp, 10, 200 );
#endif
wxPoint points[5];
points[0].x = 0;
points[0].y = 0;
points[1].x = 20;
points[1].y = 0;
points[2].x = 20;
points[2].y = 20;
points[3].x = 10;
points[3].y = 20;
points[4].x = 10;
points[4].y = -20;
dc.DrawPolygon( 5, points, 20, 250, wxODDEVEN_RULE );
dc.DrawPolygon( 5, points, 50, 250, wxWINDING_RULE );
dc.DrawArc( 20, 330, 40, 300, 20, 300 );
{
wxDCBrushChanger changeBrush(dc, *wxTRANSPARENT_BRUSH);
dc.DrawArc( 60, 330, 80, 300, 60, 300 );
}
dc.DrawEllipticArc( 80, 250, 60, 30, 0.0, 270.0 );
points[0].x = 150;
points[0].y = 250;
points[1].x = 180;
points[1].y = 250;
points[2].x = 180;
points[2].y = 220;
points[3].x = 200;
points[3].y = 220;
dc.DrawSpline( 4, points );
wxString str;
int i = 0;
str.Printf( wxT("---- Text at angle %d ----"), i );
dc.DrawRotatedText( str, 100, 300, i );
i = m_angle;
str.Printf( wxT("---- Text at angle %d ----"), i );
dc.DrawRotatedText( str, 100, 300, i );
wxIcon my_icon = wxICON(sample);
dc.DrawIcon( my_icon, 100, 100);
if (m_bitmap.IsOk())
dc.DrawBitmap( m_bitmap, 10, 10 );
#if wxUSE_GRAPHICS_CONTEXT
wxGraphicsContext *gc = NULL;
wxPrinterDC *printer_dc = wxDynamicCast( &dc, wxPrinterDC );
if (printer_dc)
gc = wxGraphicsContext::Create( *printer_dc );
wxWindowDC *window_dc = wxDynamicCast( &dc, wxWindowDC );
if (window_dc)
gc = wxGraphicsContext::Create( *window_dc );
#ifdef __WXMSW__
wxEnhMetaFileDC *emf_dc = wxDynamicCast( &dc, wxEnhMetaFileDC );
if (emf_dc)
gc = wxGraphicsContext::Create( *emf_dc );
#endif
if (gc)
{
// make a path that contains a circle and some lines, centered at 100,100
gc->SetPen( *wxRED_PEN );
wxGraphicsPath path = gc->CreatePath();
path.AddCircle( 50.0, 50.0, 50.0 );
path.MoveToPoint(0.0, 50.0);
path.AddLineToPoint(100.0, 50.0);
path.MoveToPoint(50.0, 0.0);
path.AddLineToPoint(50.0, 100.0 );
path.CloseSubpath();
path.AddRectangle(25.0, 25.0, 50.0, 50.0);
gc->StrokePath(path);
// draw some text
wxString text("Text by wxGraphicsContext");
gc->SetFont( m_testFont, *wxBLACK );
gc->DrawText(text, 25.0, 60.0);
// draw rectangle around the text
double w, h, d, el;
gc->GetTextExtent(text, &w, &h, &d, &el);
gc->SetPen( *wxBLACK_PEN );
gc->DrawRectangle(25.0, 60.0, w, h);
delete gc;
}
#endif
}
bool DiagramItem::load (QDomNode* item)
{
int ID;
bool check;
QString text;
// restore ID
ID = getNodeNumValue ( *item, QString ("ID"), &check);
if (!check)
return false;
m_ID = ID;
// restore text
text = getNodeValue ( *item, QString ("Text"));
m_strText = text;
// restore brush
QDomElement brush = item->firstChildElement(QString("Brush"));
if (!brush.isNull())
{
// restore color
QColor color;
color.setNamedColor (getNodeValue (brush, QString("Color")));
m_brush.setColor (color);
// restore style
int style = getNodeNumValue (brush, QString ("Style"), &check);
if (check)
m_brush.setStyle ((Qt::BrushStyle) style);
changeBrush( m_brush);
}
// restore pen
QDomElement pen = item->firstChildElement(QString("Pen"));
if (!pen.isNull())
{
// restore color
QColor color;
color.setNamedColor (getNodeValue (pen, QString("Color")));
m_pen.setColor(color);
// restore style
int style = getNodeNumValue (pen, QString ("Style"), &check);
if (check)
m_pen.setStyle ((Qt::PenStyle) style);
// restore width
int width = getNodeNumValue (pen, QString ("Width"), &check);
if (check)
m_pen.setWidth (width);
changePen (m_pen);
}
return true;
}
