Pen
Pen support (drawing with pen, reacting to pressure)
main.cpp
#include <CtrlLib/CtrlLib.h>
using namespace Upp;
struct MyApp : TopWindow {
Point pos;
Vector<Vector<Tuple<double, Pointf>>> drawing;
PenInfo pen;
virtual void Pen(Point p, const PenInfo& pn, dword keyflags) override {
if(keyflags & K_SHIFT) {
RectTracker tracker(*this);
tracker.MinSize(Size(-100000,-100000));
tracker.Track(Rect(p,p));
}
if(pn.pressure) {
if((!!pn.pressure == !!pen.pressure) && drawing.GetCount())
drawing.Top().Add(MakeTuple(pn.pressure, p));
else
drawing.Add().Add(MakeTuple(pn.pressure, p));
}
pen = pn;
Refresh();
}
virtual void Paint(Draw& w0) override {
DrawPainter w(w0, GetSize());
w.Co();
w.Clear(SColorPaper());
w.LineCap(LINECAP_ROUND);
for(const auto& stroke : drawing)
if(stroke.GetCount())
for(int i = 0; i < stroke.GetCount() - 1; i++) {
w.Move(stroke[i].b);
w.Line(stroke[i + 1].b);
w.Stroke(DPI(20) * stroke[i].a, Black());
}
int fcy = GetStdFontCy();
int y = 10;
auto Text = [&] (const String& text) {
w.DrawText(10, y, text);
y += fcy;
};
Text(AsString(pos));
Text(String() << "Pressure: " << pen.pressure);
Text(String() << "Rotation: " << pen.rotation);
Text(String() << "Tilt: " << pen.tilt);
Text(String() << "Barrel: " << pen.barrel);
Text(String() << "Inverted: " << pen.inverted);
Text(String() << "Eraser: " << pen.eraser);
}
};
GUI_APP_MAIN
{
MyApp().Run();
}
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