Blame c++/vector/activearea.cpp

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#include "activearea.h"
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ActiveArea::ActiveArea() {
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	add_events( Gdk::BUTTON_PRESS_MASK
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	          | Gdk::BUTTON_RELEASE_MASK
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			  | Gdk::POINTER_MOTION_MASK );
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}
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bool ActiveArea::is_point_added(const ActivePoint::Handle &point) const {
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	for(PointList::const_iterator i = points.begin(); i != points.end(); ++i)
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		if (*i == point) return true;
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	return false;
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}
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void ActiveArea::add_point(const ActivePoint::Handle &point) {
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	if (point && !is_point_added(point)) {
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		points.push_back(point);
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		queue_draw();
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	}
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}
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void ActiveArea::remove_point(const ActivePoint::Handle &point) {
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	ActivePoint::Handle p = point;
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	for(PointList::iterator i = points.begin(); i != points.end();)
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		if (*i == p) { i = points.erase(i); queue_draw(); } else ++i;
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	if (drag_point == p)
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		hover_point.reset();
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	if (hover_point == p)
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		{ hover_point->active = false; hover_point.reset(); }
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}
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void ActiveArea::bring_to_front(const ActivePoint::Handle &point) {
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	ActivePoint::Handle p = point;
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	for(PointList::iterator i = points.begin(); i != points.end(); ++i)
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		if (*i == p)
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			{ i = points.erase(i); points.push_back(p); break; }
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}
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ActivePoint::Handle ActiveArea::get_point_at(const Vector &position) const {
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	for(PointList::const_reverse_iterator ri = points.rbegin(); ri != points.rend(); ++ri)
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		if ((*ri)->enabled && (*ri)->visible && (*ri)->is_inside(position))
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			return *ri;
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	return nohandle;
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}
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bool ActiveArea::on_button_press_event(GdkEventButton* event) {
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	if (event->button == 1) {
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		Vector position(event->x, event->y);
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		ActivePoint::Handle old_point = drag_point;
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		drag_point = get_point_at(position);
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		if (drag_point) {
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			if (hover_point) hover_point->active = false;
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			hover_point = drag_point;
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			hover_point->active = true;
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			bring_to_front(drag_point);
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			drag_offset = drag_point->position - position;
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		}
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		if (old_point != drag_point) queue_draw();
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		return true;
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	}
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	return false;
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}
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bool ActiveArea::on_button_release_event(GdkEventButton* event) {
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	if (event->button == 1) {
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		if (drag_point) {
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			drag_point.reset();
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			if (hover_point) hover_point->active = false;
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			hover_point = get_point_at(Vector(event->x, event->y));
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			if (hover_point) hover_point->active = true;
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			queue_draw();
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		}
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		return true;
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	}
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	return false;
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}
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bool ActiveArea::on_motion_notify_event(GdkEventMotion* event) {
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	Vector position(event->x, event->y);
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	if (drag_point) {
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		Vector oldposition = drag_point->position;
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		Vector newposition = position + drag_offset;
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		if (newposition != oldposition) {
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			drag_point->position = newposition;
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			on_point_move(drag_point, oldposition, newposition);
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			queue_draw();
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		}
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	} else {
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		ActivePoint::Handle old_point = hover_point;
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		if (hover_point) hover_point->active = false;
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		hover_point = get_point_at(position);
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		if (hover_point) hover_point->active = true;
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		if (old_point != hover_point) queue_draw();
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	}
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	return true;
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}
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bool ActiveArea::on_draw(const Cairo::RefPtr<cairo::context> &context) {</cairo::context>
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	on_draw(Context(context));
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	return true;
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}
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void ActiveArea::on_draw(const Context &context) {
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	// fill background
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	context->save();
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	context->rectangle(0, 0, get_width(), get_height());
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	context->set_source_rgba(1, 1, 1, 1);
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	context->fill();
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	context->restore();
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	on_draw_content(context);
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	// draw points
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	for(PointList::const_iterator i = points.begin(); i != points.end(); ++i)
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		context.point(**i);
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}
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void ActiveArea::on_point_move(const ActivePoint::Handle &/*point*/, const Vector &/*oldposition*/, const Vector &/*newposition*/)
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	{ }
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void ActiveArea::on_draw_content(const Context &/*context*/)
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	{ }