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https://github.com/qelectrotech/qelectrotech-source-mirror.git
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DaTweety
3738b3c1d8
A new option in the Display menu, off by default and kept in the settings: two thin lines cross the whole folio, inside its border, through the grid point under the mouse, so that one sees at a glance whether symbols and terminals are in line, also while dragging them. They are drawn by the view in drawForeground(), on screen only: no item is added to the folio, so nothing of them is saved, exported or printed. Only the strips the lines leave and enter are repainted, and they go when the mouse leaves the view. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
110 lines
3.7 KiB
C++
110 lines
3.7 KiB
C++
// SPDX-License-Identifier: GPL-2.0-or-later
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// The folio-wide crosshair, linked against the application's objects.
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//
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// With the Display option on, two lines cross the whole folio through the
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// grid point under the mouse, to see at a glance whether parts are in
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// line. They are drawn on screen only: no item is added to the folio, so
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// nothing of them is saved, exported or printed. They go when the mouse
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// leaves the view and when the option is off, and the option is kept in
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// the settings.
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#include <QApplication>
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#include <QFontDatabase>
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#include <QImage>
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#include <QMouseEvent>
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#include <QSettings>
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#include <QTemporaryDir>
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#include <cstdio>
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#include <stdexcept>
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#include "../../sources/diagram.h"
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#include "../../sources/diagramview.h"
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#include "../../sources/qetproject.h"
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#include "../../sources/qetmessagebox.h"
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static void check(bool value, const char *message)
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{
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if (!value) throw std::runtime_error(message);
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std::printf("ok: %s\n", message);
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}
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static void moveTo(DiagramView &view, const QPoint &p)
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{
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QMouseEvent event(QEvent::MouseMove, QPointF(p), view.viewport()->mapToGlobal(QPointF(p)),
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Qt::NoButton, Qt::NoButton, Qt::NoModifier);
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QApplication::sendEvent(view.viewport(), &event);
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}
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/// How many pixels of the crosshair colour lie along one row of the view
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static int bluePixels(const QImage &image, int row)
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{
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int n = 0;
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for (int x = 0; x < image.width(); ++x) {
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const QColor c = image.pixelColor(x, row);
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if (c.blue() > 150 && c.red() < 80) ++n;
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}
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return n;
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}
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int main(int argc, char **argv)
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{
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QApplication app(argc, argv);
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std::freopen(argv[2], "w", stdout);
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QTemporaryDir settings;
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QSettings::setDefaultFormat(QSettings::IniFormat);
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QSettings::setPath(QSettings::IniFormat, QSettings::UserScope, settings.path());
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QCoreApplication::setOrganizationName("QETCrosshairRegression");
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QETProject::setBackupEnabled(false);
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QET::QetMessageBox::setNonInteractive(true);
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QFontDatabase::addApplicationFont(":/fonts/LiberationSans-Regular.ttf");
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try
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{
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QETProject project(QString::fromLocal8Bit(argv[1]));
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check(project.state() == QETProject::Ok, "fixture opens");
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project.buildFolios(project.diagrams());
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Diagram *folio = project.diagrams().first();
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DiagramView view(folio);
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view.resize(800, 600);
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view.centerOn(folio->border_and_titleblock.insideBorderRect().center());
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QApplication::processEvents();
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const int items = folio->items().size();
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check(!DiagramView::crosshairShown(), "off by default");
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const QPoint mouse(403, 297);
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moveTo(view, mouse);
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check(!view.crosshairVisible(), "no crosshair while the option is off");
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DiagramView::setCrosshairShown(true);
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moveTo(view, mouse);
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check(view.crosshairVisible(), "the crosshair follows the mouse once on");
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const QPointF at = view.crosshairPos();
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check(at == Diagram::snapToGrid(view.mapToScene(mouse)), "it stands on the grid point under the mouse");
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check(folio->items().size() == items, "nothing is added to the folio");
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const QImage image = view.viewport()->grab().toImage();
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const int row = view.mapFromScene(at).y();
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check(bluePixels(image, row) > image.width() / 2, "a line crosses the view through that point");
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check(bluePixels(image, row + 20) < image.width() / 4, "and not elsewhere");
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QEvent leave(QEvent::Leave);
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QApplication::sendEvent(view.viewport(), &leave);
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check(!view.crosshairVisible(), "it goes when the mouse leaves the view");
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DiagramView::setCrosshairShown(false);
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moveTo(view, mouse);
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check(!view.crosshairVisible(), "and when the option is switched off");
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check(!QSettings().value("diagrameditor/crosshair").toBool(), "the option is kept in the settings");
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std::puts("PASS");
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}
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catch (const std::exception &error)
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{
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std::printf("FAIL: %s\n", error.what());
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std::fflush(stdout);
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return 1;
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}
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std::fflush(stdout);
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return 0;
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}
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