void DependencyArrow::draw(const Cairo::RefPtr<Cairo::Context>& context) const
{
// the way to compute the (tcx, tcy) single control point of the
// quadratic
double dX = mControlPoint.getX() - mOrigin->getX();
double dY = mControlPoint.getY() - mOrigin->getY();
double d1 = std::sqrt(dX * dX + dY * dY);
double d = d1;
dX = mDestination->getX() - mControlPoint.getX();
dY = mDestination->getY() - mControlPoint.getY();
d += std::sqrt(dX * dX + dY * dY);
double t = d1/d;
double t1 = 1.0 - t;
double tSq = t * t;
double denom = 2.0 * t * t1;
double tcx = (mControlPoint.getX() - t1 * t1 * mOrigin->getX() -
tSq * mDestination->getX()) / denom;
double tcy = (mControlPoint.getY() - t1 * t1 * mOrigin->getY() -
tSq * mDestination->getY()) / denom;
// from the single point of the quadratic to the both of the cubic
double tcxq1 = mOrigin->getX() + 2. * (tcx - mOrigin->getX()) / 3.;
double tcyq1 = mOrigin->getY() + 2. * (tcy - mOrigin->getY()) / 3.;
double tcxq2 = mDestination->getX() +
2. * (tcx - mDestination->getX()) / 3.;
double tcyq2 = mDestination->getY() +
2. * (tcy - mDestination->getY()) / 3.;
// and now to draw,
std::valarray< double > dashes(2);
double angle = atan2 (mDestination->getY() - tcyq2,
mDestination->getX() - tcxq2) + M_PI;
double x1 = mDestination->getX() + 9 * std::cos(angle - 0.35);
double y1 = mDestination->getY() + 9 * std::sin(angle - 0.35);
double x2 = mDestination->getX() + 9 * std::cos(angle + 0.35);
double y2 = mDestination->getY() + 9 * std::sin(angle + 0.35);
dashes[0] = 8.0;
dashes[1] = 3.0;
context->save();
context->set_line_width(1);
context->move_to(mDestination->getX(), mDestination->getY());
context->line_to(x1,y1);
context->line_to(x2,y2);
context->line_to(mDestination->getX(), mDestination->getY());
context->fill();
context->set_dash(dashes,0.);
context->move_to(mOrigin->getX(), mOrigin->getY());
context->curve_to(tcxq1, tcyq1, tcxq2, tcyq2, mDestination->getX(),
mDestination->getY());
context->stroke();
context->restore();
}
Gura_ImplementMethod(wx_Pen, SetDashes)
{
Signal &sig = env.GetSignal();
Object_wx_Pen *pThis = Object_wx_Pen::GetObjectThis(arg);
if (pThis->IsInvalid(sig)) return Value::Nil;
CArrayOfDash dashes(arg.GetList(0));
pThis->GetEntity()->SetDashes(dashes.Count(), dashes.Data());
return Value::Nil;
}
static bool
setDash_func(JSContext *context,
unsigned argc,
JS::Value *vp)
{
GJS_GET_PRIV(context, argc, vp, argv, obj, GjsCairoContext, priv);
guint i;
cairo_t *cr = priv ? priv->cr : NULL;
JS::RootedObject dashes(context);
double offset;
guint len;
if (!gjs_parse_call_args(context, "setDash", argv, "of",
"dashes", &dashes,
"offset", &offset))
return false;
if (!JS_IsArrayObject(context, dashes)) {
gjs_throw(context, "dashes must be an array");
return false;
}
if (!JS_GetArrayLength(context, dashes, &len)) {
gjs_throw(context, "Can't get length of dashes");
return false;
}
std::vector<double> dashes_c;
dashes_c.reserve(len);
JS::RootedValue elem(context);
for (i = 0; i < len; ++i) {
double b;
elem.setUndefined();
if (!JS_GetElement(context, dashes, i, &elem)) {
return false;
}
if (elem.isUndefined())
continue;
if (!JS::ToNumber(context, elem, &b))
return false;
if (b <= 0) {
gjs_throw(context, "Dash value must be positive");
return false;
}
dashes_c.push_back(b);
}
cairo_set_dash(cr, &dashes_c[0], dashes_c.size(), offset);
argv.rval().setUndefined();
return true;
}
void copyContextProperties(cairo_t* srcCr, cairo_t* dstCr)
{
cairo_set_antialias(dstCr, cairo_get_antialias(srcCr));
size_t dashCount = cairo_get_dash_count(srcCr);
Vector<double> dashes(dashCount);
double offset;
cairo_get_dash(srcCr, dashes.data(), &offset);
cairo_set_dash(dstCr, dashes.data(), dashCount, offset);
cairo_set_line_cap(dstCr, cairo_get_line_cap(srcCr));
cairo_set_line_join(dstCr, cairo_get_line_join(srcCr));
cairo_set_line_width(dstCr, cairo_get_line_width(srcCr));
cairo_set_miter_limit(dstCr, cairo_get_miter_limit(srcCr));
cairo_set_fill_rule(dstCr, cairo_get_fill_rule(srcCr));
}
void CurveEditPart::drawControlLine(Cairo::RefPtr<Cairo::Context> context, const Point& start_point, const Point& end_point)
{
context->begin_new_path();
context->move_to (start_point.getX(), start_point.getY());
context->line_to (end_point.getX(), end_point.getY());
context->set_source_rgba (1, 0, 0, 0.5);
std::vector< double > dashes(2);
dashes[0] = 2.0;
dashes[1] = 2.0;
context->set_dash (dashes, 0.0);
context->set_line_width (1.0);
context->stroke();
}
void FrequencyGraph( Cairo::RefPtr<Cairo::Context> cr, bool active, float x, float y, float xS, float yS, EqualizerState state)
{
cr->set_line_cap( Cairo::LINE_CAP_ROUND );
cr->set_line_join( Cairo::LINE_JOIN_ROUND);
int xSize = xS;
int ySize = yS;
// works but a bit simple
cr -> move_to( x , y );
cr -> line_to( x + xSize, y );
cr -> line_to( x + xSize, y + ySize );
cr -> line_to( x , y + ySize );
cr -> close_path();
// Draw outline shape
cr -> set_source_rgb (0.1,0.1,0.1);
cr -> fill();
// draw "frequency guides"
std::valarray< double > dashes(2);
dashes[0] = 2.0;
dashes[1] = 2.0;
cr->set_dash (dashes, 0.0);
cr->set_line_width(1.0);
cr->set_source_rgb (0.4,0.4,0.4);
for ( int i = 0; i < 4; i++ )
{
cr->move_to( x + ((xSize / 4.f)*i), y );
cr->line_to( x + ((xSize / 4.f)*i), y + ySize );
}
for ( int i = 0; i < 4; i++ )
{
cr->move_to( x , y + ((ySize / 4.f)*i) );
cr->line_to( x +xSize, y + ((ySize / 4.f)*i) );
}
cr->stroke();
cr->unset_dash();
// set colour based on active or not
if ( active )
setColour(cr, COLOUR_BLUE_1, 0.2 );
else
setColour(cr, COLOUR_GREY_1, 0.2 );
int tmpX = x;
int tmpY = y;
// precalculate some variables
float oldGainPix = (ySize / 60.f) * (state.gain[0] - 0.5 ) * 40;
float oldXLoc = 0;
float qPix = ((xSize * 0.2) / 3.f );
//float oldCutoff = 0;
// move to bottom left, draw line to middle left
cr->move_to( tmpX, tmpY + ySize );
cr->line_to( tmpX, tmpY + (ySize * 0.5) - oldGainPix );
for ( int i = 0; i < 4; i++ )
{
//float cutoff = state.cutoffFreq[i] / 20000;
float gainPix = (ySize / 60.f) * (state.gain[i] - 0.5 ) * 40;
float xLoc = xSize * 0.2 * (i+1);
//std::cout << "I: " << i << " GainPix: " << gainPix << " tmpY - gainPix" << tmpY - gainPix << std::endl;
cr->curve_to( tmpX + oldXLoc + qPix, tmpY + (ySize * 0.5) - oldGainPix ,// control point 1
tmpX + xLoc - qPix , tmpY + (ySize * 0.5) - gainPix , // control point 2
tmpX + xLoc , tmpY + (ySize * 0.5) - gainPix ); // end of curve
// update variables for next iter
oldGainPix = gainPix;
oldXLoc = xLoc;
//oldCutoff = cutoff;
}
// last bit of curve to the right edge
cr->curve_to( tmpX + oldXLoc + qPix, tmpY + (ySize * 0.5) - oldGainPix, // control point 1
tmpX + xSize - qPix, tmpY + (ySize * 0.5) - oldGainPix, // control point 2
tmpX + xSize , tmpY + (ySize * 0.5) - oldGainPix); // end of curve
cr->line_to( tmpX + xSize , tmpY + ySize );
cr->close_path();
cr->fill_preserve();
cr->set_line_width(2.5);
if ( active )
setColour(cr, COLOUR_BLUE_1 );
else
setColour(cr, COLOUR_GREY_1 );
cr->stroke();
// outline
cr->rectangle( x, y , xS, yS );
cr->set_line_width(3);
if ( active )
setColour(cr, COLOUR_GREY_2 );
else
setColour(cr, COLOUR_GREY_3 );
cr->stroke();
//std::cout << "LupppWidget::FrequencyGraph() called!" << std::endl;
}