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1ebecbbc9d
See issue #408. This isn't working reliably yet on my system: If you enable the fix restoring the previous settings when going back to a table doesn't work and if you disable it that very way is the only way to change the option. Don't know what's going on there :(
140 lines
4.5 KiB
C++
140 lines
4.5 KiB
C++
#include "FilterTableHeader.h"
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#include <QLineEdit>
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#include <QTableView>
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#include <QScrollBar>
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#include <QKeyEvent>
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#include <QDebug>
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class FilterLineEdit : public QLineEdit
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{
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public:
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explicit FilterLineEdit(QWidget* parent, QList<FilterLineEdit*>* filters, int columnnum) : QLineEdit(parent), filterList(filters), columnNumber(columnnum)
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{
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setPlaceholderText(tr("Filter"));
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#if QT_VERSION >= QT_VERSION_CHECK(5, 2, 0)
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setClearButtonEnabled(true);
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#endif
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setProperty("column", columnnum); // Store the column number for later use
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}
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protected:
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void keyReleaseEvent(QKeyEvent* event)
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{
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if(event->key() == Qt::Key_Tab)
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{
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if(columnNumber < filterList->size() - 1)
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{
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filterList->at(columnNumber + 1)->setFocus();
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event->accept();
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}
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} else if(event->key() == Qt::Key_Backtab) {
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if(columnNumber > 0)
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{
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filterList->at(columnNumber - 1)->setFocus();
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event->accept();
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}
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}
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}
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private:
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QList<FilterLineEdit*>* filterList;
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int columnNumber;
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};
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FilterTableHeader::FilterTableHeader(QTableView* parent) :
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QHeaderView(Qt::Horizontal, parent)
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{
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// Activate the click signals to allow sorting
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#if QT_VERSION >= 0x050000
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setSectionsClickable(true);
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#else
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setClickable(true);
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#endif
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setSortIndicatorShown(true);
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// Do some connects: Basically just resize and reposition the input widgets whenever anything changes
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connect(this, SIGNAL(sectionResized(int,int,int)), this, SLOT(adjustPositions()));
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connect(parent->horizontalScrollBar(), SIGNAL(valueChanged(int)), this, SLOT(adjustPositions()));
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connect(parent->verticalScrollBar(), SIGNAL(valueChanged(int)), this, SLOT(adjustPositions()));
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// Set custom context menu handling
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setContextMenuPolicy(Qt::CustomContextMenu);
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}
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void FilterTableHeader::generateFilters(int number, bool showFirst)
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{
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// Delete all the current filter widgets
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for(int i=0;i < filterWidgets.size(); ++i)
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delete filterWidgets.at(i);
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filterWidgets.clear();
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// And generate a bunch of new ones
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for(int i=0;i < number; ++i)
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{
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FilterLineEdit* l = new FilterLineEdit(this, &filterWidgets, i);
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if(!showFirst && i == 0) // This hides the first input widget which belongs to the hidden rowid column
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l->setVisible(false);
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else
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l->setVisible(true);
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connect(l, SIGNAL(textChanged(QString)), this, SLOT(inputChanged(QString)));
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filterWidgets.push_back(l);
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}
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// Position them correctly
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adjustPositions();
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}
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QSize FilterTableHeader::sizeHint() const
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{
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// For the size hint just take the value of the standard implementation and add the height of a input widget to it if necessary
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QSize s = QHeaderView::sizeHint();
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if(filterWidgets.size())
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s.setHeight(s.height() + filterWidgets.at(0)->sizeHint().height() + 5); // The 5 adds just adds some extra space
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return s;
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}
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void FilterTableHeader::updateGeometries()
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{
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// If there are any input widgets add a viewport margin to the header to generate some empty space for them which is not affected by scrolling
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if(filterWidgets.size())
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setViewportMargins(0, 0, 0, filterWidgets.at(0)->sizeHint().height());
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else
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setViewportMargins(0, 0, 0, 0);
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// Now just call the parent implementation and reposition the input widgets
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QHeaderView::updateGeometries();
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adjustPositions();
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}
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void FilterTableHeader::adjustPositions()
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{
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// Loop through all widgets
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for(int i=0;i < filterWidgets.size(); ++i)
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{
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// Get the current widget, move it and resize it
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QWidget* w = filterWidgets.at(i);
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w->move(sectionPosition(i) - offset(), filterWidgets.at(i)->sizeHint().height() + 2); // The two adds some extra space between the header label and the input widget
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w->resize(sectionSize(i), filterWidgets.at(i)->sizeHint().height());
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}
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}
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void FilterTableHeader::inputChanged(const QString& new_value)
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{
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// Just get the column number and the new value and send them to anybody interested in filter changes
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emit filterChanged(sender()->property("column").toInt(), new_value);
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}
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void FilterTableHeader::clearFilters()
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{
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foreach (FilterLineEdit* filterLineEdit, filterWidgets)
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filterLineEdit->clear();
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}
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void FilterTableHeader::setFilter(int column, const QString& value)
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{
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if(column < filterWidgets.size())
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filterWidgets.at(column)->setText(value);
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}
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