i'm working on a Qt project with an interface and i'm using four QTableViews and for some reason, the last one is not following the others when i stretch the windows. the 4 tableviews have the exact same parameters. they are in layouts, along with other items on the interface. i set the MaximumWidth of my tableview like this :
int hHeaderWidth = ui->tableCSB_Right->verticalHeader()->width();
int rowWidth = ui->tableErr_Right->columnWidth(0);
int tableWidth = (nbOfAnt/2)*rowWidth + hHeaderWidth;
ui->tableErr_Right->setMaximumWidth(tableWidth);
ui->tableErr_left->setMaximumWidth(tableWidth);
ui->tableCSB_Right->setMaximumWidth(tableWidth);
ui->tableCSB_Left->setMaximumWidth(tableWidth);
ui->tableLeft_Coupling->setMaximumWidth(tableWidth);
ui->tableRight_Coupling->setMaximumWidth(tableWidth);
and here's what i get when i launch my program and when i stretch the window:
as you can see the last qtableview goes way farther and the other ones along with its QPushButton and labels. i dont get why does it behave like this. has anyone dealt with this problem ?
thank you in advance
Related
I've got a pretty old MFC application that's been touched by many people over the years (most of them probably not even CS guys) and it follows, what I like to call the "anarchy design pattern."
Anyway, one of the dialogs has a series of 56 vertical sliders and check boxes. However, there are additional sliders and checkboxes on the dialog as shown below.
Now, the problem is that the additional sliders and checkboxes take on IDs that are in sequence with the slider/checkbox series of the dialog. My task is to add more sliders and checkboxes to the series (in the blank space in the Slider Control group box) Unfortunately, since IDC_SLIDER57 through IDC_SLIDER61 are already in the dialog (same goes for the checkboxes), existing code, such as the snippet below will break:
pVSlider = (CSliderCtrl *)GetDlgItem(IDC_SLIDER1+i);
Is there a better way to modify the resource file without doing it manually? I've seen a third party tool called ResOrg that looks like it'll help do what I want, but the software is a bit pricey, especially since I'll only use it once. I guess I can give the demo a try, but the limitations might restrict me.
FYI, I'm using Visual C++ 6.0 (yes...I know, don't laugh, it's being forced upon me).
Instead of writing:
pVSlider = (CSliderCtrl *)GetDlgItem(IDC_SLIDER1+i);
you could write:
pVSlider = (CSliderCtrl *)GetDlgItem(GetSliderID(i));
where GetSlider is a function that returns the id of slider number i.
GetSlider function
int GetSliderID(int nslider)
{
static int sliderids[] = {IDC_SLIDER1, IDC_SLIDER2, IDC_SLIDER3, .... IDC_SLIDERn};
ASSERT(nslider < _countof(sliderids));
return sliderids[nslider];
}
With this method the IDC_SLIDERn symbols dont need to have sequential values.
I'm working on a code editor for GLSL in Qt and I'm having problems with showing the line numbers of a QTextEdit. I undestand the example from Qt Code Editor Example but this part
QTextBlock block = firstVisibleBlock();
int blockNumber = block.blockNumber();
int top = (int) blockBoundingGeometry(block).translated(contentOffset()).top();
int bottom = top + (int) blockBoundingRect(block).height();
doesn't really combine well with a QTextEdit given the fact that I don't have the firstBisibleBlock, blockBoundingGeometry and blockBoundingRect methods. I know the blocks are kept in a QTextDocument but that class doesn't have these methods either.
I tried searching for an example but every time someone asks this question he is directed to that same link.
Could anyone help me?
Thanks
The example uses QPlainTextEdit and accesses firstVisibleBlock() etc protected functions.
Take a look at the source code for QPlainTextEdit and see what IT does to implement these functions. It looks as though they are implemented in terms of the document (at least firstVisibleBlock() does).
Alternatively, copy the example and derive from QPlainTextEdit yourself and don't use QTextEdit.
I am using QT to create a chat messenger client. To display the list of online users, I'm using a QListWidget, as created like this:
listWidget = new QListWidget(horizontalLayoutWidget);
listWidget->setObjectName("userList");
QSizePolicy sizePolicy1(QSizePolicy::Preferred, QSizePolicy::Expanding);
sizePolicy1.setHorizontalStretch(0);
sizePolicy1.setVerticalStretch(0);
sizePolicy1.setHeightForWidth(listWidget->sizePolicy().hasHeightForWidth());
listWidget->setSizePolicy(sizePolicy1);
listWidget->setMinimumSize(QSize(30, 0));
listWidget->setMaximumSize(QSize(150, 16777215));
listWidget->setBaseSize(QSize(100, 0));
listWidget->setContextMenuPolicy(Qt::CustomContextMenu);
Users are shown by constantly refreshing the list, like this: (Note: There are different channels, with different userlists, so refreshing it is the most efficient thing to do, as far as I know.)
void FMessenger::refreshUserlist()
{
if (currentPanel == 0)
return;
listWidget = this->findChild<QListWidget *>(QString("userList"));
listWidget->clear();
QList<FCharacter*> charList = currentPanel->charList();
QListWidgetItem* charitem = 0;
FCharacter* character;
foreach(character, charList)
{
charitem = new QListWidgetItem(character->name());
// charitem->setIcon(QIcon(":/Images/status.png"));
listWidget->addItem(charitem);
}
}
This has always worked perfectly. The line that I commented out is the one I have problems with: my current goal is to be able to display a user's online status with an image, which represents whether they are busy, away, available, etc. Using setIcon() does absolutely nothing though, apparently; the items still show up as they used to, without icons.
I'm aware that this is probably not the way this function needs to be used, but I have found little documentation about it online, and absolutely no useful examples of implementations. My question is, can anybody help me with fixing this problem?
This is how you may conduct your debugging:
Try the constructor that has both icon and text as arguments.
Try to use that icon in another context to ensure it is displayable (construct a QIcon with same argument and use it elsewhere, e.g. QLabel!).
Use icon() from the QListWidgetItem to receive back the icon and then look at that QIcon.
Create a new QListWidget, change nothing, and ordinarily add some stock items in your MainWidget's constructor. See if the icons show up there.
This should be simple it seems but I can't quite get it to work. I want a control (I guess CListBox or CListCtrl) which displays text strings in a nice tabulated way.
As items are added, they should be added along a row until that row is full, and then start a new row. Like typing in your wordprocessor - when the line is full, items start being added to the next line, and the control can scroll vertically.
What I get when trying with a list-mode CListCtrl is a single row which just keeps growing, with a horizontal scroll bar. I can't see a way to change that, there must be one?
You probably need a list control wth LVS_REPORT. If you expect the user to add items interactively using a keyboard, you probably need a data grid, not a list. Adding editing to list control subitems is not easy, and it would be easier to start from CWnd. Search "MFC Data Grid" to find some open source class libraries that implemented the feature.
If you can afford adding /clr to your program, you can try the data grid classes in Windows Forms using MFC's Windows Form hosting support. You will find a lot more programming resources on data grid classes in Windows Forms than any other third-party MFC data grid class library.
If you use CRichEditCtrl you can set it to word-wrap, take a look at this snippet extracted from:
http://www.tech-archive.net/Archive/Development/microsoft.public.win32.programmer.ui/2004-03/0111.html
(I've derived my own QRichEditCtrl from the MFC CRichEditCtrl,
and here's the relevant code:)
void QRichEditCtrl::SetWordWrap(bool bWrap)
{
RECT r;
GetWindowRect(&r);
CDC * pDC = GetDC();
long lLineWidth = 9999999; // This is the non-wrap width
if (bWrap)
{
lLineWidth = ::MulDiv(pDC->GetDeviceCaps(PHYSICALWIDTH),
1440, pDC->GetDeviceCaps(LOGPIXELSX));
}
SetTargetDevice(*GetDC(), lLineWidth);
}
I would like to ask if anyone knows how to display 2 QToolBars in two lines, one on top of the other? I found the class QStyleOptionToolBar, but I don't know how to use it...
It is easy to drag one toolbar with the mouse to be placed below the other, so I think there must be a way how this can be done from the source code as well...
Any hint would be appreciated!
Claus
Try calling QMainWindow::addToolBarBreak(Qt::ToolBarArea) in between adding the two tool bars.
I think that when you add the 2 toolbar's if you place them in the same area, they'll stack automatically:
QMainWindow *mainWin = get_main(); // however you get it
mainWin->addToolBar(Qt::TopToolBarArea, new QToolBar);
mainWin->addToolBar(Qt::TopToolBarArea, new QToolBar);
This should produce 2 toolbars, both at the top.
If you want toolbars to be in two lines you should do it in following manner:
firstToolbar = new QToolBar(this);
secondToolbar = new QToolBar(this);
addToolBar(Qt::TopToolBarArea, firstToolbar);
addToolBarBreak();
addToolBar(Qt::TopToolBarArea, secondToolbar);
addToolBarBreak accepts Qt::ToolBarArea so you can specify for which area you would like to add the break. By default it is Qt::TopToolBarArea.