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Viewing changes to lib/libellacore/common/ellacore-item.vala

  • Committer: xapantu
  • Date: 2011-06-06 16:55:22 UTC
  • Revision ID: xapantu@gmail.com-20110606165522-x3qwmjtalm9lqai7
Bezier curves

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lib/libellacore/common/ellacore-item.vala
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public class Ella.Point : GLib.Object
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{
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    public double x;
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    public double y;
 
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    double x_;
 
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    double y_;
 
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    public double x
 
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    {
 
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        set { x2 += value - x; x1 += value - x; x_ = value; }
 
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        get { return x_; }
 
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    }
 
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    public double y
 
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    {
 
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        set { y1 += value - y_; y2 += value - y_; y_ = value; }
 
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        get { return y_; }
 
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    }
 
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    public double x1;
 
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    public double x2;
 
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    public double y1;
 
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    public double y2;
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    public Point(double x, double y)
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    {
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        this.x = x;
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        this.y = y;
 
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        x1 = x2 = this.x_ = x;
 
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        y1 = y2 = this.y_ = y;
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    }
 
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    public Rect rect
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    {
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        get
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            return rect;
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        }
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    }
 
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    public Rect rect2
 
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    {
 
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        get
 
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        {
 
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            Rect rect = Rect();
 
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            rect.x = x2 - 5;
 
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            rect.y = y2 - 5;
 
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            rect.width = 10;
 
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            rect.height = 10;
 
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            return rect;
 
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        }
 
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    }
 
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    public Rect rect1
 
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    {
 
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        get
 
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        {
 
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            Rect rect = Rect();
 
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            rect.x = x1 - 5;
 
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            rect.y = y1 - 5;
 
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            rect.width = 10;
 
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            rect.height = 10;
 
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            return rect;
 
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        }
 
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    }
 
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}
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public bool RectIsIn(double x, double y, Ella.Rect rect1)
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        }
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    }
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    public void button_press_event(Gdk.EventButton event)
 
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    {
 
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        switch(event.button)
 
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        {
 
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        case 1:
 
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            select_point_at(event.x, event.y);
 
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            break;
 
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        case 3:
 
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            select_point_at(event.x, event.y);
 
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            points[point_selected].x1 -= 10;
 
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            points[point_selected].y1 -= 10;
 
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            points[point_selected].x2 += 10;
 
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            points[point_selected].y2 += 10;
 
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            break;
 
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        }
 
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    }
 
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    public void motion_notify_event(Gdk.EventMotion event)
 
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    {
 
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        move_point(event.x, event.y);
 
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    }
 
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    public void move_point(double event_x, double event_y)
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    {
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        event_x = event_x / width;
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        event_y = event_y / height;
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        points[point_selected].x = event_x;
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        points[point_selected].y = event_y;
 
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        switch(point_select)
 
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        {
 
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        case 0:
 
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            points[point_selected].x = event_x;
 
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            points[point_selected].y = event_y;
 
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            break;
 
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        case 1:
 
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            points[point_selected].x1 = event_x;
 
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            points[point_selected].y1 = event_y;
 
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            break;
 
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        case 2:
 
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            points[point_selected].x2 = event_x;
 
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            points[point_selected].y2 = event_y;
 
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            break;
 
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        }
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    }
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    int point_select;
 
1181
 
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    public void select_point_at(double event_x, double event_y)
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    {
1105
 
        event_x = (event_x - x) / width;
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        event_y = (event_y - y) / height;
 
1184
        event_x = (event_x) / width;
 
1185
        event_y = (event_y) / height;
 
1186
        point_select = 0;
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        foreach(Point point in points)
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        {
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            if(RectIsIn(event_x, event_y, point.rect))
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            {
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                select_point(point);
 
1192
                point_select = 0;
 
1193
                return;
 
1194
            }
 
1195
            else if(RectIsIn(event_x, event_y, point.rect1))
 
1196
            {
 
1197
                select_point(point);
 
1198
                point_select = 1;
 
1199
                return;
 
1200
            }
 
1201
            else if(RectIsIn(event_x, event_y, point.rect2))
 
1202
            {
 
1203
                select_point(point);
 
1204
                point_select = 2;
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                return;
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            }
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        }
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        cr.translate(x - x_root, y - y_root);
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1221
        cr.scale(width, height);
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        cr.set_line_width(line_width);
 
1223
        double old_point_x = -1;
 
1224
        double old_point_y = -1;
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        foreach(Point point in points)
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        {
1132
 
            cr.line_to(point.x, point.y);
 
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            if(old_point_x >= 0)
 
1228
            {
 
1229
                cr.curve_to(old_point_x, old_point_y, point.x1, point.y1, point.x, point.y);
 
1230
            }
 
1231
            else
 
1232
            {
 
1233
                cr.line_to(point.x, point.y);
 
1234
            }
 
1235
            old_point_x = point.x2;
 
1236
            old_point_y = point.y2;
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        }
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        cr.close_path();
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        cr.set_source_rgba(red, green, blue, alpha);
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        foreach(Point item in points)
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        {
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            var rect = item.rect;
 
1255
            cr.set_source_rgb(0,0,0);
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            cr.rectangle(rect.x * width, rect.y * height, rect.width, rect.height);
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            cr.fill();
 
1258
            cr.set_source_rgba(0,0,0,0.5);
 
1259
            cr.rectangle(item.x1, item.y1, rect.width, rect.height);
 
1260
            cr.fill();
 
1261
            cr.rectangle(item.x2, item.y2, rect.width, rect.height);
 
1262
            cr.fill();
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        }
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        var rect = points[point_selected].rect;
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        cr.rectangle(rect.x * width, rect.y * height, rect.width, rect.height);