Layoutie/BoardGrid.cpp at master · constrictor/Layoutie · GitHub

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/*
 *    This file is part of layoutie.
 *
 *    layoutie is free software: you can redistribute it and/or modify
 *    it under the terms of the GNU General Public License as published by
 *    the Free Software Foundation, either version 3 of the License, or
 *    (at your option) any later version.
 *
 *    layoutie is distributed in the hope that it will be useful,
 *    but WITHOUT ANY WARRANTY; without even the implied warranty of
 *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *    GNU General Public License for more details.
 *
 *    You should have received a copy of the GNU General Public License
 *    along with layoutie.  If not, see <http://www.gnu.org/licenses/>.
 *
 */

#include "BoardGrid.h"

#include "Settings.h"

#include <SLBoard.h>

#include <QPen>

BoardGrid::BoardGrid(const SLFormat::Board* inBoard)
    : QGraphicsItemGroup(), mBoard(inBoard)
{
    updateGrid();
}

void BoardGrid::updateGrid()
{
    for (auto mainLine : mMainLines)
    {
        this->removeFromGroup(mainLine);
        delete mainLine;
    }
    mMainLines.clear();
    unsigned gridSize = static_cast<unsigned>(mBoard->gridSize());
    unsigned numSubdivisions = gSettings().numGridSubdivisions();

    const QPen& subLinePen(gSettings().gridSubPen());
    const QPen& mainLinePen(gSettings().gridMainPen());

    const QPointF origin(mBoard->origin().x / 1000, mBoard->origin().y / 1000);

    // vertical
    {
        unsigned i = 0;
        while(true)
        {
            i++;
            float currPos = origin.x() + i * gridSize;
            if (currPos >= mBoard->size().x)
                break;
            auto line = new QGraphicsLineItem(currPos, 0, currPos, mBoard->size().y);
            line->setPen((numSubdivisions == 0 || i % numSubdivisions != 0) ? subLinePen : mainLinePen);
            this->addToGroup(line);
        }
        i = 0;
        while(true)
        {
            i++;
            float currPos = origin.x() - i * gridSize;
            if (currPos <= 0)
                break;
            auto line = new QGraphicsLineItem(currPos, 0, currPos, mBoard->size().y);
            line->setPen((numSubdivisions == 0 || i % numSubdivisions != 0) ? subLinePen : mainLinePen);
            this->addToGroup(line);
        }
    }

    // horizontal
    {
        unsigned i = 0;
        while(true)
        {
            i++;
            float currPos = origin.y() + i * gridSize;
            if (currPos >= mBoard->size().y)
                break;
            auto line = new QGraphicsLineItem(0, currPos, mBoard->size().x, currPos);
            line->setPen((numSubdivisions == 0 || i % numSubdivisions != 0) ? subLinePen : mainLinePen);
            this->addToGroup(line);
        }
        i = 0;
        while(true)
        {
            i++;
            float currPos = origin.y() - i * gridSize;
            if (currPos <= 0)
                break;
            auto line = new QGraphicsLineItem(0, currPos, mBoard->size().x, currPos);
            line->setPen((numSubdivisions == 0 || i % numSubdivisions != 0) ? subLinePen : mainLinePen);
            this->addToGroup(line);
        }
    }

    // origin point
    if (mBoard->origin().x || mBoard->origin().y)
    {
        const QPen& originPen(gSettings().gridOriginPen());
        // vertical
        {
            float currPos = mBoard->origin().x / 1000;
            if (currPos < mBoard->size().x)
            {
                auto line = new QGraphicsLineItem(currPos, 0, currPos, mBoard->size().y);
                line->setPen(originPen);
                this->addToGroup(line);
            }
        }

        // horizontal
        {
            double currPos = mBoard->origin().y / 1000;
            if (currPos < mBoard->size().y)
            {
                auto line = new QGraphicsLineItem(0, currPos, mBoard->size().x, currPos);
                line->setPen(originPen);
                this->addToGroup(line);
            }
        }
    }
}