troubles with a WTableView
Added by fedya fedyakov about 11 years ago
Guys,
I have some troubles with WTableView. The first one is the WTableView doesn't scroll to the last row, but to the row just before last one, leaving the last row invisible.
I believe that the code like this
WAbstractTableModel* model = table_view->model();
table_view~~scrollTo(model>index(modelrowCount()~~ 1, 0));
should do the trick, but in fact it doesn't.
The second one is a very long time takes WTableView to change selection in response to mouse click.
Actually it takes about half a second to select the row being clicked.
Is there a way to get it to work faster?
Thanks
Replies (6)
RE: troubles with a WTableView - Added by fedya fedyakov about 11 years ago
I'm new to Wt, so I'm sorry if these questions look stupid...
RE: troubles with a WTableView - Added by Koen Deforche about 11 years ago
Hey,
Your first problem seems indeed to be a regression with scrollTo() API. I'll take a look at it.
The long timeout for mouse click is because of a timeout that has been added to differentiate with double clicks. This has already been reported as a bug and indeed we can fix this by only keeping this delay if there is effectively any interest in the double click signal.
Thanks,
koen
RE: troubles with a WTableView - Added by Koen Deforche about 11 years ago
Hey,
I seem to be underestimating the library: both these problems no longer exist with Wt 3.3.0(RC2).
In fact, the second issues should have been fixed since Wt 3.2.3 --- what version are you using ?
Regards,
koen
RE: troubles with a WTableView - Added by fedya fedyakov about 11 years ago
Hey Koen,
I'm using 3.3.0 rc2 and as I can see, the problems are still there.
May be the root of the first problem ( not showing of the last row in the table) due to inpack of the layout manager?
My ui cosists of two WTableView-s and two WCartesianChart-s
void create_ui() {
create_master_table();
create_slave_table();
create_charts();
setup_charts();
WGridLayout *grid = new WGridLayout();
grid->addWidget(createTitle(WString::fromUTF8("Measures")), 0, 0);
grid->addWidget(createTitle(WString::fromUTF8("Испытания")), 0, 1);
grid->addWidget(slave_table_, 1, 0);
grid->addWidget(master_table_, 1, 1);
grid->setColumnStretch(1, 1);
grid->setRowStretch(1, 1);
grid->setColumnResizable(0);
WHBoxLayout *hbox = new WHBoxLayout();
hbox->addWidget(slave_plot_, 1);
hbox->addWidget(narrowed_slave_plot_, 1);
hbox->setResizable(0);
WVBoxLayout *vbox = new WVBoxLayout();
vbox->addLayout(grid);
vbox->addLayout(hbox);
vbox->setResizable(0);
setLayout(vbox);
}
And at the some point the following method is called
void master_select_last_row() {
master_table_->selectionChanged().setBlocked(true);
BOOST_SCOPE_EXIT(master_table_) {
master_table_->selectionChanged().setBlocked(false);
} BOOST_SCOPE_EXIT_END;
if (int n = master_model_->rowCount()) {
---n;
master_table_scrollTo(master_model_>index(n, 0));
master_table_select(master_model_>index(n, 0));
}
}
And after this code being executed the WTableView scrolls to the row just before the last one which is
still invisible and selected.
As for the next problem - is I said before - I have two tables ( WTableView ) master one and slave one and
two plots ( WCartesialChart ). Master table shows about 10 - 15 rows and slave table ~ 25 - 30 (slave table contains ~250 - 300 records).
changing the current row of the master table lead to chandge the of content of the slave one.
void slave_model_t::set_current(int cur) {
if (cur < data_.size()) {
layoutAboutToBeChanged().emit();
// current is the master record index
current_ = cur;
layoutChanged().emit();
}
}
Which in turn leads to repaint of the plots (250-300 points).
On the console this activity looks as a bunch of web requests with a very
long roundtrip.
[2013-Mar-03 13:03:39.311817] 6112 - [info] "WebRequest: too1k2 72.7707..01.61m
s~~\"~~ [2013-Mar-03 13:03:39.325817] "POST /pctl?wtd=3HT4KAZigEOda8Ns HTTP/1.1\" 2
00 50
[2013-Mar-03 13:03:39.355819] 6112 - [info] "WebRequest: took 52.003ms"
[2013-Mar-03 13:03:39.408822] 6112 - [info] "WebRequest: took 41.002ms"
127.0.0.1 - - [2013-Mar-03 13:03:39.418823] "POST /pctl?wtd=3HT4KAZigEOda8Ns HTT
P/1.1" 200 50
[2013-Mar-03 13:03:39.433823] 6112 - [info] "WebRequest: took 31.001ms"
[2013-Mar-03 13:03:39.614834] 6112 - [info] "WebRequest: took 169.01ms"
127.0.0.1 - - [2013-Mar-03 13:03:39.841847] "POST /pctl?wtd=3HT4KAZigEOda8Ns HTT
P/1.1" 200 4864
[2013-Mar-03 13:03:39.858848] 6112 - [info] "WebRequest: took 353.015ms"
Regards
fedya
RE: troubles with a WTableView - Added by fedya fedyakov about 11 years ago
Oh, sorry for my poor english.
I think I could try to cope with this by not just directly
switch the current record in the event handler as I currently do
void on_master_selection_changed() {
int row = selected_row();
if (row != --1) {
master_model_->set_current(row);
}
}
but make something like this
void on_master_selection_changed() {
int row = selected_row();
if (row != --1) {
///master_model_->set_current(row);
WServer::instance()post( WApplication::instance()>sessionId(),
std::bind(&master_model_t::set_current_row, master_model, row));
}
}
hope it'll do the trick