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/*
TikZiT - a GUI diagram editor for TikZ
Copyright (C) 2018 Aleks Kissinger
This program 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.
This program 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 this program. If not, see <https://www.gnu.org/licenses/>.
*/
#include "tikzview.h"
#include "tikzit.h"
#include <QDebug>
#include <QScrollBar>
TikzView::TikzView(QWidget *parent) : QGraphicsView(parent)
{
setRenderHint(QPainter::Antialiasing);
//setDragMode(QGraphicsView::RubberBandDrag);
_scale = 1.0f;
}
void TikzView::zoomIn()
{
_scale *= 1.6f;
scale(1.6,1.6);
}
void TikzView::zoomOut()
{
_scale *= 0.625f;
scale(0.625,0.625);
}
void TikzView::setScene(QGraphicsScene *scene)
{
QGraphicsView::setScene(scene);
centerOn(QPointF(0.0f,-230.0f));
}
void TikzView::drawBackground(QPainter *painter, const QRectF &rect)
{
// draw a gray background if disabled
TikzScene *sc = static_cast<TikzScene*>(scene());
if (!sc->enabled()) painter->fillRect(rect, QBrush(QColor(240,240,240)));
// draw the grid
QPen pen1;
//pen1.setWidthF(0.5);
pen1.setCosmetic(true);
pen1.setColor(QColor(250,250,255));
QPen pen2 = pen1;
pen2.setColor(QColor(240,240,250));
QPen pen3 = pen1;
pen3.setColor(QColor(220,220,240));
painter->setPen(pen1);
if (_scale > 0.2f) {
for (int x = -GRID_SEP; x > rect.left(); x -= GRID_SEP) {
if (x % (GRID_SEP * GRID_N) != 0) {
qreal xf = (qreal)x;
painter->drawLine(xf, rect.top(), xf, rect.bottom());
}
}
for (int x = GRID_SEP; x < rect.right(); x += GRID_SEP) {
if (x % (GRID_SEP * GRID_N) != 0) {
qreal xf = (qreal)x;
painter->drawLine(xf, rect.top(), xf, rect.bottom());
}
}
for (int y = -GRID_SEP; y > rect.top(); y -= GRID_SEP) {
if (y % (GRID_SEP * GRID_N) != 0) {
qreal yf = (qreal)y;
painter->drawLine(rect.left(), yf, rect.right(), yf);
}
}
for (int y = GRID_SEP; y < rect.bottom(); y += GRID_SEP) {
if (y % (GRID_SEP * GRID_N) != 0) {
qreal yf = (qreal)y;
painter->drawLine(rect.left(), yf, rect.right(), yf);
}
}
}
painter->setPen(pen2);
for (int x = -GRID_SEP*GRID_N; x > rect.left(); x -= GRID_SEP*GRID_N) {
qreal xf = (qreal)x;
painter->drawLine(xf, rect.top(), xf, rect.bottom());
}
for (int x = GRID_SEP*GRID_N; x < rect.right(); x += GRID_SEP*GRID_N) {
qreal xf = (qreal)x;
painter->drawLine(xf, rect.top(), xf, rect.bottom());
}
for (int y = -GRID_SEP*GRID_N; y > rect.top(); y -= GRID_SEP*GRID_N) {
qreal yf = (qreal)y;
painter->drawLine(rect.left(), yf, rect.right(), yf);
}
for (int y = GRID_SEP*GRID_N; y < rect.bottom(); y += GRID_SEP*GRID_N) {
qreal yf = (qreal)y;
painter->drawLine(rect.left(), yf, rect.right(), yf);
}
painter->setPen(pen3);
painter->drawLine(rect.left(), 0, rect.right(), 0);
painter->drawLine(0, rect.top(), 0, rect.bottom());
}
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