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Printing support #1525: plot printing using preview dialog

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Add shortcut and entry in context menu for printing a plot.
This commit is contained in:
mgr
2018-09-29 23:54:51 +02:00
parent e771662e6c
commit 79983e25cf
2 changed files with 41 additions and 1 deletions
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39
src/PlotDock.cpp
View File

@@ -5,6 +5,9 @@
#include "FileDialog.h"
#include "MainWindow.h" // Just for BrowseDataTableSettings, not for the actual main window class
#include <QPrinter>
#include <QPrintPreviewDialog>
PlotDock::PlotDock(QWidget* parent)
: QDialog(parent),
ui(new Ui::PlotDock),
@@ -40,18 +43,28 @@ PlotDock::PlotDock(QWidget* parent)
QShortcut* shortcutCopy = new QShortcut(QKeySequence::Copy, ui->plotWidget, nullptr, nullptr, Qt::WidgetShortcut);
connect(shortcutCopy, SIGNAL(activated()), this, SLOT(copy()));
QShortcut* shortcutPrint = new QShortcut(QKeySequence::Print, ui->plotWidget, nullptr, nullptr, Qt::WidgetShortcut);
connect(shortcutPrint, &QShortcut::activated, this, &PlotDock::openPrintDialog);
ui->plotWidget->setContextMenuPolicy(Qt::CustomContextMenu);
// Set up context menu
m_contextMenu = new QMenu(this);
QAction* copyAction = new QAction(QIcon(":/icons/copy"), tr("Copy"), m_contextMenu);
copyAction->setShortcut(shortcutCopy->key());
m_contextMenu->addAction(copyAction);
connect(copyAction, &QAction::triggered, [&]() {
copy();
});
QAction* printAction = new QAction(QIcon(":/icons/print"), tr("Print..."), m_contextMenu);
printAction->setShortcut(shortcutPrint->key());
m_contextMenu->addAction(printAction);
connect(printAction, &QAction::triggered, [&]() {
openPrintDialog();
});
QAction* showLegendAction = new QAction(tr("Show legend"), m_contextMenu);
showLegendAction->setCheckable(true);
m_contextMenu->addAction(showLegendAction);
@@ -851,3 +864,27 @@ void PlotDock::reject()
// dock go away
return;
}
void PlotDock::openPrintDialog()
{
QPrinter printer;
QPrintPreviewDialog previewDialog(&printer, this);
connect(&previewDialog, &QPrintPreviewDialog::paintRequested, this, &PlotDock::renderPlot);
previewDialog.exec();
}
void PlotDock::renderPlot(QPrinter* printer)
{
QCPPainter painter(printer);
QRectF pageRect = printer->pageRect(QPrinter::DevicePixel);
int plotWidth = ui->plotWidget->viewport().width();
int plotHeight = ui->plotWidget->viewport().height();
double scale = pageRect.width()/(double)plotWidth;
painter.setMode(QCPPainter::pmVectorized);
painter.setMode(QCPPainter::pmNoCaching);
painter.scale(scale, scale);
ui->plotWidget->toPainter(&painter, plotWidth, plotHeight);
}

3
src/PlotDock.h
View File

@@ -7,6 +7,7 @@
class SqliteTableModel;
class QTreeWidgetItem;
class QPrinter;
struct BrowseDataTableSettings;
namespace Ui {
@@ -110,6 +111,8 @@ private slots:
void copy();
void toggleLegendVisible(bool visible);
void toggleStackedBars(bool stacked);
void openPrintDialog();
void renderPlot(QPrinter* printer);
};
#endif