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#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.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 = -GRID_SEP; x > rect.left(); x -= GRID_SEP) {
if (x % (GRID_SEP * GRID_N) != 0) painter->drawLine(x, rect.top(), x, rect.bottom());
}
for (int x = GRID_SEP; x < rect.right(); x += GRID_SEP) {
if (x % (GRID_SEP * GRID_N) != 0) painter->drawLine(x, rect.top(), x, rect.bottom());
}
for (int y = -GRID_SEP; y > rect.top(); y -= GRID_SEP) {
if (y % (GRID_SEP * GRID_N) != 0) painter->drawLine(rect.left(), y, rect.right(), y);
}
for (int y = GRID_SEP; y < rect.bottom(); y += GRID_SEP) {
if (y % (GRID_SEP * GRID_N) != 0) painter->drawLine(rect.left(), y, rect.right(), y);
}
}
painter->setPen(pen2);
for (int x = -GRID_SEP*GRID_N; x > rect.left(); x -= GRID_SEP*GRID_N) {
painter->drawLine(x, rect.top(), x, rect.bottom());
}
for (int x = GRID_SEP*GRID_N; x < rect.right(); x += GRID_SEP*GRID_N) {
painter->drawLine(x, rect.top(), x, rect.bottom());
}
for (int y = -GRID_SEP*GRID_N; y > rect.top(); y -= GRID_SEP*GRID_N) {
painter->drawLine(rect.left(), y, rect.right(), y);
}
for (int y = GRID_SEP*GRID_N; y < rect.bottom(); y += GRID_SEP*GRID_N) {
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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