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#include <2geom/path.h>
#include <toys/path-cairo.h>
#include <toys/toy-framework-2.h>
class DrawToy: public Toy {
PointSetHandle hand;
//Knot : Och : Och : Knot : Och : Och : Knot : Och : Och : ...
void draw(cairo_t *cr, std::ostringstream */*notify*/, int /*width*/, int /*height*/, bool save, std::ostringstream*) override {
if(!save) {
cairo_set_source_rgba (cr, 0, 0.5, 0, 1);
cairo_set_line_width (cr, 1);
for(unsigned i = 0; i < hand.pts.size(); i+=3) {
draw_circ(cr, hand.pts[i]);
draw_number(cr, hand.pts[i], i/3);
}
cairo_set_source_rgba (cr, 0, 0, 0.5, 1);
for(unsigned i = 2; i < hand.pts.size(); i+=3) {
draw_circ(cr, hand.pts[i]);
draw_circ(cr, hand.pts[i-1]);
}
cairo_set_source_rgba (cr, 0.5, 0, 0, 1);
for(unsigned i = 3; i < hand.pts.size(); i+=3) {
draw_line_seg(cr, hand.pts[i-2], hand.pts[i-3]);
draw_line_seg(cr, hand.pts[i], hand.pts[i-1]);
}
}
cairo_set_source_rgba (cr, 0, 0, 0, 1);
Geom::Path pb;
if(hand.pts.size() > 3) {
pb.start(hand.pts[0]);
for(unsigned i = 1; i < hand.pts.size() - 3; i+=3) {
pb.appendNew<Geom::CubicBezier>(hand.pts[i], hand.pts[i+1], hand.pts[i+2]);
}
}
cairo_path(cr, pb);
cairo_stroke(cr);
}
void mouse_pressed(GdkEventButton* e) override {
selected = NULL;
Geom::Point mouse(e->x, e->y);
int close_i = 0;
float close_d = 1000;
for(unsigned i = 0; i < hand.pts.size(); i+=1) {
if(Geom::distance(mouse, hand.pts[i]) < close_d) {
close_d = Geom::distance(mouse, hand.pts[i]);
close_i = i;
}
}
if(close_d < 5) {
if(e->button==3)
hand.pts.erase(hand.pts.begin() + close_i);
else {
selected = &hand;
hit_data = (void*)(intptr_t)close_i;
}
} else {
if(e->button==1) {
if(hand.pts.size() > 0) {
if(hand.pts.size() == 1) {
hand.pts.push_back((hand.pts[0] * 2 + mouse) / 3);
hand.pts.push_back((hand.pts[0] + mouse * 2) / 3);
} else {
Geom::Point prev = hand.pts[hand.pts.size() - 1];
Geom::Point curve = prev - hand.pts[hand.pts.size() - 2];
hand.pts.push_back(prev + curve);
hand.pts.push_back(mouse + curve);
}
}
hand.pts.push_back(mouse);
} else {
selected = &hand;
hit_data = (void*)(intptr_t)close_i;
}
}
}
void mouse_moved(GdkEventMotion* e) override {
Geom::Point mouse(e->x, e->y);
if(e->state & (GDK_BUTTON1_MASK) && selected != NULL) {
// NOTE this is completely broken.
int hd = 0;
if (hd % 3 == 0) {
Geom::Point diff = mouse - hand.pts[hd];
if(int(hand.pts.size() - 1) > hd) hand.pts[hd + 1] += diff;
if(hd != 0) hand.pts[hd - 1] += diff;
}
Toy::mouse_moved(e);
}
}
bool should_draw_numbers() override { return false; }
public:
DrawToy() {
handles.push_back(&hand);
}
};
int main(int argc, char **argv) {
init(argc, argv, new DrawToy());
return 0;
}
/*
Local Variables:
mode:c++
c-file-style:"stroustrup"
c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
indent-tabs-mode:nil
fill-column:99
End:
*/
// vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=4:softtabstop=4:fileencoding=utf-8:textwidth=99 :
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