C++ PathObject::parts方法代码示例

void TextSymbol::createBaselineRenderables(
        const TextObject* text_object,
        const VirtualCoordVector& coords,
        ObjectRenderables& output) const
{
	const MapColor* dominant_color = guessDominantColor();
	if (dominant_color && text_object->getNumLines() > 0)
	{
		// Insert text boundary
		LineSymbol line_symbol;
		line_symbol.setColor(dominant_color);
		line_symbol.setLineWidth(0);
		
		const TextObjectLineInfo* line = text_object->getLineInfo(0);
		QRectF text_bbox(line->line_x, line->line_y - line->ascent, line->width, line->ascent + line->descent);
		for (int i = 1; i < text_object->getNumLines(); ++i)
		{
			const TextObjectLineInfo* line = text_object->getLineInfo(i);
			rectInclude(text_bbox, QRectF(line->line_x, line->line_y - line->ascent, line->width, line->ascent + line->descent));
		}
		
		Q_UNUSED(coords); // coords should be used for calcTextToMapTransform()
		QTransform text_to_map = text_object->calcTextToMapTransform();
		PathObject path;
		path.addCoordinate(MapCoord(text_to_map.map(text_bbox.topLeft())));
		path.addCoordinate(MapCoord(text_to_map.map(text_bbox.topRight())));
		path.addCoordinate(MapCoord(text_to_map.map(text_bbox.bottomRight())));
		path.addCoordinate(MapCoord(text_to_map.map(text_bbox.bottomLeft())));
		path.parts().front().setClosed(true, true);
		path.updatePathCoords();
		
		LineRenderable* line_renderable = new LineRenderable(&line_symbol, path.parts().front(), false);
		output.insertRenderable(line_renderable);
	}
}

bool DrawPathTool::removeLastPointFromSelectedPath()
{
	if (editingInProgress() || map()->getNumSelectedObjects() != 1)
	{
		return false;
	}
	
	Object* object = map()->getFirstSelectedObject();
	if (object->getType() != Object::Path)
	{
		return false;
	}
	
	PathObject* path = object->asPath();
	if (path->parts().size() != 1)
	{
		return false;
	}
	
	int points_on_path = 0;
	int num_coords = path->getCoordinateCount();
	for (int i = 0; i < num_coords && points_on_path < 3; ++i)
	{
		++points_on_path;
		if (path->getCoordinate(i).isCurveStart())
		{
			i += 2; // Skip the control points.
		}
	}
	
	if (points_on_path < 3)
	{
		// Too few points after deleting the last: delete the whole object.
		map()->deleteSelectedObjects();
		return true;
	}
	
	ReplaceObjectsUndoStep* undo_step = new ReplaceObjectsUndoStep(map());
	Object* undo_duplicate = object->duplicate();
	undo_duplicate->setMap(map());
	undo_step->addObject(object, undo_duplicate);
	map()->push(undo_step);
	updateDirtyRect();
	
	path->parts().front().setClosed(false);
	path->deleteCoordinate(num_coords - 1, false);
	
	path->update();
	map()->setObjectsDirty();
	map()->emitSelectionEdited();
	return true;
}

void CutTool::pathFinished(PathObject* split_path)
{
	Map* map = this->map();
	
	// Get path endpoint and check if it is on the area boundary
	const MapCoordVector& path_coords = split_path->getRawCoordinateVector();
	MapCoord path_end = path_coords.at(path_coords.size() - 1);
	
	PathObject* edited_path = reinterpret_cast<PathObject*>(edit_object);
	PathCoord end_path_coord;
	float distance_sq;
	edited_path->calcClosestPointOnPath(MapCoordF(path_end), distance_sq, end_path_coord);
	
	float click_tolerance_map = 0.001 * edit_widget->getMapView()->pixelToLength(clickTolerance());
	if (distance_sq > click_tolerance_map*click_tolerance_map)
	{
		QMessageBox::warning(window(), tr("Error"), tr("The split line must end on the area boundary!"));
		pathAborted();
		return;
	}
	else if (drag_part_index != edited_path->findPartIndexForIndex(end_path_coord.index))
	{
		QMessageBox::warning(window(), tr("Error"), tr("Start and end of the split line are at different parts of the object!"));
		pathAborted();
		return;
	}
	else if (drag_start_len == end_path_coord.clen)
	{
		QMessageBox::warning(window(), tr("Error"), tr("Start and end of the split line are at the same position!"));
		pathAborted();
		return;
	}
	
	Q_ASSERT(split_path->parts().size() == 1);
	split_path->parts().front().setClosed(false);
	split_path->setCoordinate(split_path->getCoordinateCount() - 1, MapCoord(end_path_coord.pos));
	
	// Do the splitting
	const double split_threshold = 0.01;
	
	MapPart* part = map->getCurrentPart();
	AddObjectsUndoStep* add_step = new AddObjectsUndoStep(map);
	add_step->addObject(part->findObjectIndex(edited_path), edited_path);
	map->removeObjectFromSelection(edited_path, false);
	map->deleteObject(edited_path, true);
	map->setObjectsDirty();
	
	DeleteObjectsUndoStep* delete_step = new DeleteObjectsUndoStep(map);
	
	PathObject* holes = nullptr; // if the edited path contains holes, they are saved in this temporary object
	if (edited_path->parts().size() > 1)
	{
		holes = edited_path->duplicate()->asPath();
		holes->deletePart(0);
	}
	
	bool ok; Q_UNUSED(ok); // "ok" is only used in Q_ASSERT.
	PathObject* parts[2] = { new PathObject { edited_path->parts().front() }, nullptr };
	const PathPart& drag_part = edited_path->parts()[drag_part_index];
	if (drag_part.isClosed())
	{
		parts[1] = new PathObject { *parts[0] };
		
		parts[0]->changePathBounds(drag_part_index, drag_start_len, end_path_coord.clen);
		ok = parts[0]->connectIfClose(split_path, split_threshold);
		Q_ASSERT(ok);

		parts[1]->changePathBounds(drag_part_index, end_path_coord.clen, drag_start_len);
		ok = parts[1]->connectIfClose(split_path, split_threshold);
		Q_ASSERT(ok);
	}
	else
	{
		float min_cut_pos = qMin(drag_start_len, end_path_coord.clen);
		float max_cut_pos = qMax(drag_start_len, end_path_coord.clen);
		float path_len = drag_part.path_coords.back().clen;
		if (min_cut_pos <= 0 && max_cut_pos >= path_len)
		{
			ok = parts[0]->connectIfClose(split_path, split_threshold);
			Q_ASSERT(ok);
			
			parts[1] = new PathObject { *split_path };
			parts[1]->setSymbol(edited_path->getSymbol(), false);
		}
		else if (min_cut_pos <= 0 || max_cut_pos >= path_len)
		{
			float cut_pos = (min_cut_pos <= 0) ? max_cut_pos : min_cut_pos;
			parts[1] = new PathObject { *parts[0] };
			
			parts[0]->changePathBounds(drag_part_index, 0, cut_pos);
			ok = parts[0]->connectIfClose(split_path, split_threshold);
			Q_ASSERT(ok);
			
			parts[1]->changePathBounds(drag_part_index, cut_pos, path_len);
			ok = parts[1]->connectIfClose(split_path, split_threshold);
			Q_ASSERT(ok);
		}
		else
		{
			parts[1] = new PathObject { *parts[0] };
//.........这里部分代码省略.........