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Fix perf issues and crash when showing 1'100'000 items (#9968)

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This commit is contained in:
Guillaume Munch 2016-03-10 01:08:51 +00:00
parent 997349280e
commit 13a993fda8
1 changed files with 27 additions and 24 deletions
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45
src/frontends/qt4/GuiSymbols.cpp
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@ -27,8 +27,6 @@
#include "support/gettext.h"
#include <QChar>
#include <QPixmap>
#include <QListWidgetItem>
#include <QString>
#include <cstdio>
@ -194,11 +192,11 @@ QString getBlock(char_type c)
//
/////////////////////////////////////////////////////////////////////
class GuiSymbols::Model : public QAbstractItemModel
class GuiSymbols::Model : public QAbstractListModel
{
public:
Model(GuiSymbols * parent)
: QAbstractItemModel(parent)
: QAbstractListModel(parent)
{}
QModelIndex index(int row, int column, QModelIndex const &) const
@ -216,11 +214,6 @@ public:
return symbols_.count();
}
int columnCount(QModelIndex const &) const
{
return 1;
}
QVariant data(QModelIndex const & index, int role) const
{
static QString const strCharacter = qt_("Character: ");
@ -230,27 +223,33 @@ public:
char_type c = symbols_.at(index.row());
if (role == Qt::TextAlignmentRole)
switch (role) {
case Qt::TextAlignmentRole:
return QVariant(Qt::AlignCenter);
if (role == Qt::DisplayRole)
case Qt::DisplayRole:
return toqstr(c);
if (role == Qt::ToolTipRole) {
case Qt::ToolTipRole: {
char codeName[10];
sprintf(codeName, "0x%04x", c);
return strCharacter + toqstr(c) + '\n'
+ strCodePoint + QLatin1String(codeName);
}
//LYXERR0("role: " << role << " row: " << index.row());
return QVariant();
case Qt::SizeHintRole:
// Fix many symbols not displaying in combination with
// setUniformItemSizes
return QSize(1000,1000);
default:
return QVariant();
}
}
void setSymbols(QList<char_type> const & symbols)
{
QAbstractItemModel::beginResetModel();
beginResetModel();
beginInsertRows(QModelIndex(), 0, symbols.size() - 1);
symbols_ = symbols;
QAbstractItemModel::endResetModel();
endInsertRows();
endResetModel();
}
private:
@ -275,16 +274,20 @@ GuiSymbols::GuiSymbols(GuiView & lv)
setFocusProxy(symbolsLW);
symbolsLW->setViewMode(QListView::IconMode);
symbolsLW->setLayoutMode(QListView::Batched);
symbolsLW->setBatchSize(1000);
symbolsLW->setUniformItemSizes(true);
// increase the display size of the symbols a bit
QFont font = symbolsLW->font();
const int size = font.pointSize() + 3;
font.setPointSize(size);
symbolsLW->setFont(font);
QFontMetrics fm(font);
const int cellHeight = fm.height() + 2;
const int cellHeight = fm.height() + 6;
// FIXME: using at least cellHeight because of
// QFontMetrics::maxWidth() is returning 0 with Qt/Cocoa on Mac OS
const int cellWidth = max(cellHeight, fm.maxWidth() + 2);
const int cellWidth = max(cellHeight - 2, fm.maxWidth() + 4);
symbolsLW->setGridSize(QSize(cellWidth, cellHeight));
symbolsLW->setModel(model_);
}