Details
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Bug
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Resolution: Done
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P3: Somewhat important
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5.4.0, 5.5.0
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None
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Windows 7 MSVC2013
Windows XP MinGW
OSX Yosemite 10.10.5 Clang
Ubuntu 14.04 GCC
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451fcee8a8ec8ae6204e5bd0b26fff5c1292c677
Description
When inserting widgets into a QTableWidget, they will be misplaced vertically if:
- there are more rows in the QTableWidget than there are rows visible, so that a vertical scrollbar is present
- the last row has only partial height (i.e the height of the table widget minus the vertical header is not an even multiple of the row height)
- the last row is visible on the screen
- a new row is added to the QTableWidget
To test in Qt Creator, create an empty widgets app.
In the .pro file, add
CONFIG += c++11
in main.cpp, add these #include lines:
#include "QPushButton" #include "QTableWidget" #include "QVBoxLayout" #include "QLineEdit"
remove these 2 lines:
MainWindow w; w.show();
instead insert these lines:
auto b = new QPushButton("Add one row"); auto tw = new QTableWidget(2,2); auto v = new QVBoxLayout; v->addWidget(b); v->addWidget(tw); auto w = new QWidget; w->setLayout(v); w->show(); // for the bug to occur, we need the last row to have partial height (i.e. not completely visible) auto lastRowHeight = tw->height() % tw->rowHeight(0); if ((lastRowHeight < 8) || ((tw->rowHeight(0) - lastRowHeight) < 8)) b->setText("Need a better height for the last row, try resizing table widget"); // bug strikes when: scroll down to the bottom, clean the table, add one more row than before b->connect(b,&QPushButton::clicked,[tw] { auto rows = tw->rowCount(); tw->scrollToBottom(); tw->setRowCount(0); tw->setRowCount(++rows); tw->setItem(0,0,new QTableWidgetItem("Hello")); tw->setCellWidget(0,1,new QLineEdit("world")); // these lines are not needed for the bug to occur, only used to avoid manual scrolling up to the top qApp->processEvents(); tw->scrollToTop(); });
Note: you can use a QComboBox or a QPushButton instead of a QLineEdit, the result is the same.
Attachments
Issue Links
- is duplicated by
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- Closed
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