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#include "tikzview.h"
#include "tikzit.h"
#include <QDebug>
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::drawBackground(QPainter *painter, const QRectF &rect)
{
// draw the grid
int step = GLOBAL_SCALE / 8;
QPen pen1;
pen1.setWidth(1);
pen1.setCosmetic(true);
pen1.setColor(QColor(230,230,230));
QPen pen2 = pen1;
pen2.setColor(QColor(200,200,200));
QPen pen3 = pen1;
pen3.setColor(QColor(160,160,160));
painter->setPen(pen1);
if (_scale > 0.2f) {
for (int x = -step; x > rect.left(); x -= step) {
if (x % (step * 8) != 0) painter->drawLine(x, rect.top(), x, rect.bottom());
}
for (int x = step; x < rect.right(); x += step) {
if (x % (step * 8) != 0) painter->drawLine(x, rect.top(), x, rect.bottom());
}
for (int y = -step; y > rect.top(); y -= step) {
if (y % (step * 8) != 0) painter->drawLine(rect.left(), y, rect.right(), y);
}
for (int y = step; y < rect.bottom(); y += step) {
if (y % (step * 8) != 0) painter->drawLine(rect.left(), y, rect.right(), y);
}
}
painter->setPen(pen2);
for (int x = -step*8; x > rect.left(); x -= step*8) {
painter->drawLine(x, rect.top(), x, rect.bottom());
}
for (int x = step*8; x < rect.right(); x += step*8) {
painter->drawLine(x, rect.top(), x, rect.bottom());
}
for (int y = -step*8; y > rect.top(); y -= step*8) {
painter->drawLine(rect.left(), y, rect.right(), y);
}
for (int y = step*8; y < rect.bottom(); y += step*8) {
painter->drawLine(rect.left(), y, rect.right(), y);
}
painter->setPen(pen3);
painter->drawLine(rect.left(), 0, rect.right(), 0);
painter->drawLine(0, rect.top(), 0, rect.bottom());
}
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