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Print: improve table printing by using QTableView
The current QTextDocument implementation is slow due to HTML parsing. By using QTableView with QAbstractTableModel we boost the performance of the table print drastically. This patch completely replaces the old solution. There is a hidden QTableView widget which is populated with all data and rendered using a QPainter attached to the printer device. A couple of new classes are added in models.h/cpp that handle the table print model and these are then used in printlayout.h/cpp. Signed-off-by: Lubomir I. Ivanov <neolit123@gmail.com> Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
This commit is contained in:
Lubomir I. Ivanov
Dirk Hohndel
parent
1f976371bf
commit
e5b18db802
4 changed files with 259 additions and 132 deletions
106
qt-ui/models.cpp
106
qt-ui/models.cpp
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@ -1438,3 +1438,109 @@ void YearlyStatisticsModel::update_yearly_stats()
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item->parent = rootItem;
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}
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}
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/*#################################################################
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* #
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* # Table Print Model
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* #
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* ################################################################
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*/
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TablePrintModel::TablePrintModel()
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{
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columns = 7;
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rows = 0;
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}
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TablePrintModel::~TablePrintModel()
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{
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for (int i = 0; i < list.size(); i++)
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delete list.at(i);
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}
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void TablePrintModel::insertRow(int index)
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{
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struct TablePrintItem *item = new struct TablePrintItem();
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item->colorBackground = 0xffffffff;
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if (index == -1) {
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beginInsertRows(QModelIndex(), rows, rows);
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list.append(item);
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} else {
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beginInsertRows(QModelIndex(), index, index);
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list.insert(index, item);
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}
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endInsertRows();
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rows++;
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}
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void TablePrintModel::callReset()
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{
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reset();
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}
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QVariant TablePrintModel::data(const QModelIndex &index, int role) const
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{
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if (!index.isValid())
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return QVariant();
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if (role == Qt::BackgroundRole)
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return QColor(list.at(index.row())->colorBackground);
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if (role == Qt::DisplayRole)
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switch (index.column()) {
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case 0:
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return list.at(index.row())->number;
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case 1:
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return list.at(index.row())->date;
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case 2:
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return list.at(index.row())->depth;
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case 3:
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return list.at(index.row())->duration;
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case 4:
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return list.at(index.row())->divemaster;
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case 5:
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return list.at(index.row())->buddy;
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case 6:
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return list.at(index.row())->location;
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}
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return QVariant();
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}
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bool TablePrintModel::setData(const QModelIndex &index, const QVariant &value, int role)
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{
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if (index.isValid()) {
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if (role == Qt::DisplayRole) {
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switch (index.column()) {
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case 0:
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list.at(index.row())->number = value.toString();
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case 1:
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list.at(index.row())->date = value.toString();
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case 2:
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list.at(index.row())->depth = value.toString();
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case 3:
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list.at(index.row())->duration = value.toString();
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case 4:
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list.at(index.row())->divemaster = value.toString();
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case 5:
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list.at(index.row())->buddy = value.toString();
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case 6:
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list.at(index.row())->location = value.toString();
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}
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return true;
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}
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if (role == Qt::BackgroundRole) {
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list.at(index.row())->colorBackground = value.value<unsigned int>();
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return true;
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}
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}
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return false;
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}
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int TablePrintModel::rowCount(const QModelIndex &parent) const
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{
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Q_UNUSED(parent);
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return rows;
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}
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int TablePrintModel::columnCount(const QModelIndex &parent) const
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{
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Q_UNUSED(parent);
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return columns;
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}
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@ -230,4 +230,45 @@ public:
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YearlyStatisticsModel(QObject* parent = 0);
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void update_yearly_stats();
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};
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/* TablePrintModel:
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* for now we use a blank table model with row items TablePrintItem.
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* these are pretty much the same as DiveItem, but have color
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* properties, as well. perhaps later one a more unified model has to be
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* considered, but the current TablePrintModel idea has to be extended
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* to support variadic column lists and column list orders that can
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* be controlled by the user.
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*/
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struct TablePrintItem {
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QString number;
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QString date;
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QString depth;
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QString duration;
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QString divemaster;
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QString buddy;
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QString location;
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unsigned int colorBackground;
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};
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class TablePrintModel : public QAbstractTableModel
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{
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Q_OBJECT
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private:
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QList<struct TablePrintItem *> list;
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public:
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~TablePrintModel();
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TablePrintModel();
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int rows, columns;
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void insertRow(int index = -1);
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void callReset();
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QVariant data(const QModelIndex &index, int role) const;
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bool setData(const QModelIndex &index, const QVariant &value, int role);
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int rowCount(const QModelIndex &parent) const;
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int columnCount(const QModelIndex &parent) const;
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};
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#endif
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@ -1,9 +1,10 @@
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#include <QtCore/qmath.h>
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#include <QDebug>
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#include <QPainter>
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#include <QDesktopWidget>
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#include <QApplication>
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#include <QTextDocument>
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#include <QAbstractTextDocumentLayout>
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#include <QTableView>
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#include <QHeaderView>
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#include "mainwindow.h"
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#include "profilegraphics.h"
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#include "printlayout.h"
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@ -21,8 +22,6 @@ struct options {
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};
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*/
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#define TABLE_PRINT_COL 7
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PrintLayout::PrintLayout(PrintDialog *dialogPtr, QPrinter *printerPtr, struct options *optionsPtr)
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{
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dialog = dialogPtr;
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@ -30,20 +29,21 @@ PrintLayout::PrintLayout(PrintDialog *dialogPtr, QPrinter *printerPtr, struct op
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printOptions = optionsPtr;
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// table print settings
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tableColumnNames.append(tr("Dive#"));
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tableColumnNames.append(tr("Date"));
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tableColumnNames.append(tr("Depth"));
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tableColumnNames.append(tr("Duration"));
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tableColumnNames.append(tr("Master"));
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tableColumnNames.append(tr("Buddy"));
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tableColumnNames.append(tr("Location"));
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tableColumnWidths.append("7");
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tableColumnWidths.append("10");
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tableColumnWidths.append("10");
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tableColumnWidths.append("10");
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tableColumnWidths.append("15");
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tableColumnWidths.append("15");
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tableColumnWidths.append("100");
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tablePrintHeadingBackground = 0xffeeeeee;
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tablePrintColumnNames.append(tr("Dive#"));
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tablePrintColumnNames.append(tr("Date"));
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tablePrintColumnNames.append(tr("Depth"));
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tablePrintColumnNames.append(tr("Duration"));
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tablePrintColumnNames.append(tr("Master"));
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tablePrintColumnNames.append(tr("Buddy"));
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tablePrintColumnNames.append(tr("Location"));
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tablePrintColumnWidths.append(7);
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tablePrintColumnWidths.append(10);
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tablePrintColumnWidths.append(10);
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tablePrintColumnWidths.append(10);
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tablePrintColumnWidths.append(15);
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tablePrintColumnWidths.append(15);
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tablePrintColumnWidths.append(33);
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}
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void PrintLayout::print()
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@ -74,6 +74,10 @@ void PrintLayout::setup()
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scaleX = (qreal)printerDpi/(qreal)screenDpiX;
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scaleY = (qreal)printerDpi/(qreal)screenDpiY;
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// a printer page scalled to screen DPI
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scaledPageW = pageRect.width() / scaleX;
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scaledPageH = pageRect.height() / scaleY;
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}
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// experimental
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@ -90,7 +94,7 @@ void PrintLayout::printSixDives() const
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profile->clear();
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profile->setPrintMode(true, !printOptions->color_selected);
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QSize originalSize = profile->size();
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profile->resize(pageRect.height()/scaleY, pageRect.width()/scaleX);
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profile->resize(scaledPageW, scaledPageH);
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int i;
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struct dive *dive;
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@ -122,127 +126,100 @@ void PrintLayout::printTwoDives() const
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// nop
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}
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void PrintLayout::printTable() const
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void PrintLayout::printTable()
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{
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QTextDocument doc;
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QSizeF pageSize;
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pageSize.setWidth(pageRect.width());
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pageSize.setHeight(pageRect.height());
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doc.documentLayout()->setPaintDevice(printer);
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doc.setPageSize(pageSize);
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// create and setup a table
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QTableView table;
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table.setAttribute(Qt::WA_DontShowOnScreen);
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table.setSelectionMode(QAbstractItemView::NoSelection);
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table.setFocusPolicy(Qt::NoFocus);
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table.horizontalHeader()->setVisible(false);
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table.horizontalHeader()->setResizeMode(QHeaderView::Fixed);
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table.verticalHeader()->setVisible(false);
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table.verticalHeader()->setResizeMode(QHeaderView::ResizeToContents);
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table.setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
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table.setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
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// fit table to one page initially
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table.resize(scaledPageW, scaledPageH);
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QString styleSheet(
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"<style type='text/css'>"
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"table {"
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" border-width: 1px;"
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" border-style: solid;"
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" border-color: #999999;"
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"}"
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"th {"
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" background-color: #eeeeee;"
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" font-size: small;"
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" padding: 3px 5px 3px 5px;"
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"}"
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"td {"
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" font-size: small;"
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" padding: 3px 5px 3px 5px;"
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"}"
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"</style>"
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);
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// setDefaultStyleSheet() doesn't work here?
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const QString heading(insertTableHeadingRow());
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const QString lineBreak("<br>");
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QString htmlText = styleSheet + "<table cellspacing='0' width='100%'>";
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QString htmlTextPrev;
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int pageCountNew = 1, pageCount = 0, lastPageWithHeading = 0;
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bool insertHeading = true;
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int i;
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// create and fill a table model
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TablePrintModel model;
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struct dive *dive;
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int i, row = 0;
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addTablePrintHeadingRow(&model, row); // add one heading row
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row++;
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for_each_dive(i, dive) {
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if (!dive->selected && printOptions->print_selected)
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continue;
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if (insertHeading) {
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htmlTextPrev = htmlText;
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htmlText += heading;
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doc.setHtml(htmlText);
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pageCount = doc.pageCount();
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// prevent adding two headings on the same page
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if (pageCount == lastPageWithHeading) {
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htmlText = htmlTextPrev;
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// add line breaks until a new page is reached
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while (pageCount == lastPageWithHeading) {
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htmlTextPrev = htmlText;
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htmlText += lineBreak;
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doc.setHtml(htmlText);
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pageCount = doc.pageCount();
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}
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// revert last line break from the new page and add heading
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htmlText = htmlTextPrev;
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htmlText += heading;
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}
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insertHeading = false;
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lastPageWithHeading = pageCount;
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}
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htmlTextPrev = htmlText;
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htmlText += insertTableDataRow(dive);
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doc.setHtml(htmlText);
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pageCount = pageCountNew;
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pageCountNew = doc.pageCount();
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// if the page count increases revert and add heading instead
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if (pageCountNew > pageCount) {
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htmlText = htmlTextPrev;
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insertHeading = true;
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addTablePrintDataRow(&model, row, dive);
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row++;
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}
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table.setModel(&model); // set model to table
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// resize columns to percentages from page width
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for (int i = 0; i < model.columns; i++) {
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int pw = qCeil((qreal)(tablePrintColumnWidths.at(i) * table.width()) / 100);
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table.horizontalHeader()->resizeSection(i, pw);
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}
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// reset the model at this point
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model.callReset();
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// a list of vertical offsets where pages begin and some helpers
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QList<unsigned int> pageIndexes;
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pageIndexes.append(0);
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int tableHeight = 0, rowH = 0, accH = 0;
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// process all rows
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for (int i = 0; i < model.rows; i++) {
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rowH = table.rowHeight(i);
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accH += rowH;
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if (accH > scaledPageH) { // push a new page index and add a heading
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pageIndexes.append(pageIndexes.last() + (accH - rowH));
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addTablePrintHeadingRow(&model, i);
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accH = 0;
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i--;
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}
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tableHeight += rowH;
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}
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pageIndexes.append(pageIndexes.last() + accH);
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// resize the whole widget so that it can be rendered
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table.resize(scaledPageW, tableHeight);
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// attach a painter and render pages by using pageIndexes
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QPainter painter(printer);
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painter.setRenderHint(QPainter::Antialiasing);
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painter.setRenderHint(QPainter::SmoothPixmapTransform);
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painter.scale(scaleX, scaleY);
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for (int i = 0; i < pageIndexes.size() - 1; i++) {
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if (i > 0)
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printer->newPage();
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QRegion region(0, pageIndexes.at(i) - 1,
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table.width(),
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pageIndexes.at(i + 1) - pageIndexes.at(i) + 2);
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table.render(&painter, QPoint(0, 0), region);
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}
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htmlText += "</table>";
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doc.setHtml(htmlText);
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doc.print(printer);
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}
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QString PrintLayout::insertTableHeadingRow() const
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void PrintLayout::addTablePrintDataRow(TablePrintModel *model, int row, struct dive *dive) const
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{
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int i;
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QString ret("<tr>");
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for (i = 0; i < TABLE_PRINT_COL; i++)
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ret += insertTableHeadingCol(i);
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ret += "</tr>";
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return ret;
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}
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QString PrintLayout::insertTableHeadingCol(int col) const
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{
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QString ret("<th align='left' width='");
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ret += tableColumnWidths.at(col);
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ret += "%'>";
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ret += tableColumnNames.at(col);
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ret += "</th>";
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return ret;
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}
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QString PrintLayout::insertTableDataRow(struct dive *dive) const
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{
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// use the DiveItem class
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struct DiveItem di;
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di.dive = dive;
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// fill row
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QString ret("<tr>");
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ret += insertTableDataCol(QString::number(dive->number));
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ret += insertTableDataCol(di.displayDate());
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ret += insertTableDataCol(di.displayDepth());
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ret += insertTableDataCol(di.displayDuration());
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ret += insertTableDataCol(dive->divemaster);
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ret += insertTableDataCol(dive->buddy);
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ret += insertTableDataCol(dive->location);
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ret += "</tr>";
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return ret;
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model->insertRow();
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model->setData(model->index(row, 0), QString::number(dive->number), Qt::DisplayRole);
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model->setData(model->index(row, 1), di.displayDate(), Qt::DisplayRole);
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model->setData(model->index(row, 2), di.displayDepth(), Qt::DisplayRole);
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model->setData(model->index(row, 3), di.displayDuration(), Qt::DisplayRole);
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model->setData(model->index(row, 4), dive->divemaster, Qt::DisplayRole);
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model->setData(model->index(row, 5), dive->buddy, Qt::DisplayRole);
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model->setData(model->index(row, 6), dive->location, Qt::DisplayRole);
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}
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QString PrintLayout::insertTableDataCol(QString data) const
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void PrintLayout::addTablePrintHeadingRow(TablePrintModel *model, int row) const
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{
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return "<td>" + data + "</td>";
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model->insertRow(row);
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for (int i = 0; i < model->columns; i++) {
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model->setData(model->index(row, i), tablePrintColumnNames.at(i), Qt::DisplayRole);
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model->setData(model->index(row, i), tablePrintHeadingBackground, Qt::BackgroundRole);
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}
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}
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// experimental
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@ -1,10 +1,13 @@
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#ifndef PRINTLAYOUT_H
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#define PRINTLAYOUT_H
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#include <QObject>
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#include <QPrinter>
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#include <QStringList>
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#include <QList>
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class PrintDialog;
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class TablePrintModel;
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struct dive;
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class PrintLayout : public QObject {
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Q_OBJECT
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|
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@ -19,21 +22,21 @@ private:
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struct options *printOptions;
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QPainter *painter;
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int screenDpiX, screenDpiY, printerDpi;
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int screenDpiX, screenDpiY, printerDpi, scaledPageW, scaledPageH;
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qreal scaleX, scaleY;
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QRect pageRect;
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QStringList tableColumnNames;
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QStringList tableColumnWidths;
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QList<QString> tablePrintColumnNames;
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QList<unsigned int> tablePrintColumnWidths;
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unsigned int tablePrintHeadingBackground;
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void setup();
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void printSixDives() const;
|
||||
void printTwoDives() const;
|
||||
void printTable() const;
|
||||
QString insertTableHeadingRow() const;
|
||||
QString insertTableHeadingCol(int) const;
|
||||
QString insertTableDataRow(struct dive *) const;
|
||||
QString insertTableDataCol(QString) const;
|
||||
void printTable();
|
||||
void addTablePrintDataRow(TablePrintModel *model, int row, struct dive *dive) const;
|
||||
void addTablePrintHeadingRow(TablePrintModel *model, int row) const;
|
||||
|
||||
QPixmap convertPixmapToGrayscale(QPixmap) const;
|
||||
};
|
||||
|
||||
|
|
|
|||
Loading…
Reference in a new issue