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Add headless command-line export (PDF/PNG/SVG)

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Implements the long-requested batch/headless export
(bugtracker #171, GitHub #309): render a project's diagrams to files
without opening the GUI.

  qelectrotech --export-pdf <project.qet> <output.pdf>   one multi-page PDF
  qelectrotech --export-png <project.qet> <output_dir>   one PNG per diagram
  qelectrotech --export-svg <project.qet> <output_dir>   one SVG per diagram

main.cpp detects an export request before SingleApplication is created (so the
arguments are not forwarded to a running instance), spins up a plain
QApplication for rendering, and exits with the export's status code.

Rendering reuses Diagram::render() over
BorderTitleBlock::borderAndTitleBlockRect(), the same geometry the GUI
print/export path uses, so output matches the editor. Image files are named
NN_Title.<ext>.

New files: sources/cli_export.{h,cpp}, registered in
cmake/qet_compilation_vars.cmake.
This commit is contained in:
Shane Ringrose
2026-06-11 11:10:09 +12:00
parent 6c4711a8d0
commit 1070179617
4 changed files with 285 additions and 0 deletions
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sources/main.cpp
+16
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@@ -15,6 +15,7 @@
You should have received a copy of the GNU General Public License
along with QElectroTech. If not, see <http://www.gnu.org/licenses/>.
*/
#include "cli_export.h"
#include "machine_info.h"
#include "qet.h"
#include "qetapp.h"
@@ -22,6 +23,8 @@
#include "utils/macosxopenevent.h"
#include "utils/qetsettings.h"
#include <QApplication>
#include <QStyleFactory>
#include <QtConcurrentRun>
@@ -194,6 +197,19 @@ QGuiApplication::setHighDpiScaleFactorRoundingPolicy(QetSettings::hdpiScaleFacto
#endif
// Headless command-line export: render a project to PDF/PNG/SVG without
// opening the GUI, then exit. Must be handled before SingleApplication
// (which would forward the args to an already-running instance).
{
QStringList raw_args;
for (int i = 0; i < argc; ++i)
raw_args << QString::fromLocal8Bit(argv[i]);
if (CLIExport::isExportRequest(raw_args)) {
QApplication export_app(argc, argv);
return CLIExport::run(export_app.arguments());
}
}
SingleApplication app(argc, argv, true);
#ifdef Q_OS_MACOS
//Handle the opening of QET when user double click on a .qet .elmt .tbt file