git.mar77i.info Git - bigintmandel/blob - bigintwidget.cpp

   1
   2 // bigintwidget.cpp
   3
   4 #include <QLayout>
   5 #include <QMouseEvent>
   6 #include <QtConcurrent/QtConcurrent>
   7
   8 #include "bigintwidget.h"
   9
  10 BigintWidget::BigintWidget(QWidget *parent)
  11 :   QWidget(parent),
  12     fw(new QFutureWatcher<MandelResultCell>(this)),
  13     meta(8192, QSize(1800, 1000)),
  14     img_label(new QLabel(this)),
  15     img_dirty(true)
  16 {
  17     connect(
  18         fw,
  19         &QFutureWatcher<MandelResultCell>::resultReadyAt,
  20         this,
  21         &BigintWidget::finished_cell
  22     );
  23     connect(
  24         fw,
  25         &QFutureWatcher<MandelResultCell>::finished,
  26         this,
  27         &BigintWidget::finished
  28     );
  29     fw->setFuture(QtConcurrent::mapped(meta.get_cells(), MandelMeta::iterate));
  30     setLayout(new QVBoxLayout());
  31     layout()->addWidget(img_label);
  32     img_label->setMinimumSize(meta.get_size());
  33 }
  34
  35 BigintWidget::~BigintWidget() {
  36     fw->cancel();
  37     fw->waitForFinished();
  38 }
  39
  40 void BigintWidget::finished_cell(int num) {
  41     meta.finished_cell(num, fw->resultAt(num));
  42     img_dirty = true;
  43     update();
  44 }
  45
  46 void BigintWidget::finished() {
  47     img_dirty = true;
  48     update();
  49 }
  50
  51 void BigintWidget::paintEvent(QPaintEvent *event) {
  52     if (img_dirty) {
  53         img_label->setPixmap(meta.get_pixmap());
  54         img_dirty = false;
  55     }
  56 }
  57
  58 void BigintWidget::mousePressEvent(QMouseEvent *event) {
  59     if (!fw->isFinished() || event->button() != Qt::MouseButton::LeftButton)
  60         return;
  61     QPoint pos = img_label->mapFromParent(event->pos());
  62     if (pos.x() < 0 || pos.x() >= meta.get_width()
  63             || pos.y() < 0 || pos.y() >= meta.get_height())
  64         return;
  65     meta.zoom2x(pos);
  66     fw->setFuture(QtConcurrent::mapped(meta.get_cells(), MandelMeta::iterate));
  67     img_dirty = true;
  68     update();
  69 }