RubyQt Crashing on QTableWidget - ruby

Question

I'm getting some weirdness with QtRuby when using a TableWidget. The table widget loads, but when you click on the elements in the row, the app segfaults and crashes.
require 'Qt4'
class SimpleModel < Qt::AbstractTableModel
def rowCount(parent)
return 1
end
def columnCount(parent)
return 1
end
def data(index, role=Qt::DisplayRole)
return Qt::Variant.new("Really Long String") if index.row == 0 and index.column == 0 and role == Qt::DisplayRole
return Qt::Variant.new
end
end
Qt::Application.new(ARGV) do
Qt::TableWidget.new(1, 1) do
set_model SimpleModel.new
show
end
exec
end
The backtrace seems to imply that it is bombing in mousePressEvent
#6 0x01624643 in QAbstractItemView::pressed(QModelIndex const&) () from /usr/lib/libQtGui.so.4
#7 0x016306f5 in QAbstractItemView::mousePressEvent(QMouseEvent*) () from /usr/lib/libQtGui.so.4
If I override mousePressEvent and mouseMoveEvent, these kinds of crashes no longer happen. Am I doing something wrong over here, or can I chalk this up as a bug in QtRuby?
I'm on fedora11, with the following packages installed:
QtRuby-4.4.0-1.fc11.i586
ruby-1.8.6.369-1.fc11.i586
These crashes also happen when running the script on Windows.

Answer 1

You're using a Qt::TableWidget when you should be using a Qt::TableView. The following code fixed the crash for me. In addition to a switch from Qt::TableWidget to Qt::TableView, I also reimplemented the index method, just in case. :)
require 'Qt4'
class SimpleModel < Qt::AbstractTableModel
def rowCount(parent)
return 1
end
def columnCount(parent)
return 1
end
def data(index, role=Qt::DisplayRole)
return Qt::Variant.new("Really Long String") if index.row == 0 and index.column == 0 and role == Qt::DisplayRole
return Qt::Variant.new
end
def index(row, column, parent)
if (row > 0 || column > 0)
return Qt::ModelIndex.new
else
return createIndex(row, column, 128*row*column)
end
end
end
Qt::Application.new(ARGV) do
Qt::TableView.new do
set_model SimpleModel.new
show
end
exec
end