1 files changed, 116 insertions, 0 deletions
diff --git a/src/toys/draw-toy.cpp b/src/toys/draw-toy.cpp
new file mode 100644
index 0000000..f5bd315
--- /dev/null
+++ b/src/toys/draw-toy.cpp
@@ -0,0 +1,116 @@
+#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 :