I'm creating a 'scrolling-text' class in Qt, using a QTextEdit (read-only, no scrollbars, moveCursor) and a QTimer - simple and working.
My problem is when the text sent to the class is shorter (narrower) than the QTextEdit-box.
Silly, I agree, but, being new to Qt, I didn't find an easy way to compare the width of the given text (depending on the font) and the actual width that can be displayed inside the QTextEdit (after calculating the FrameStyle, etc.). I presume I need to calculate the pixels.
Any ideas?
Thanks
You can get the width of a text using QFontMetrics:
int textWidth = myTextEdit->fontMetrics().width(myTextEdit->text());
Related
Im changing text of QTabWidget dynamically and also changing its font family. so the text in the tabBar header is exceeding the actual width. how i can control the text to wrap inside the tabBar width like
"Text.."
im setting the font family using stylesheet
QString menuBarStyle = QString("QTabBar::tab {font-family: %1;font-style: %2;font-size: 11pt;font-weight: %3;width: 130px}").arg(m_currentFont.family()).arg(fontStyle).arg(fontWeight);
TabWidget->setStyleSheet(menuBarStyle);
Qt stylesheet technique may or may not let to solve it that but I once resolved similar problem like that:
QString elidedText(const QFont& someFont, int width)
{
QFontMetrics metrix( someFont );
return metrix.elidedText(text, Qt::ElideRight, width);
}
So, in addition to font object you have to have the width to fit the text in. Also frequently applying changes via the stylesheet for the widget can hardly be optimal solution, it does a bit too much to get the small change.
Setting text for QTextEdit:
te->setPlainText(“Something”) ;
te->adjustSize();
should wrap around “Something” only, instead the QTextEdit is expanding to its maximum Width-Height, can’t fix it..
When I select “Something” on run time, only “Something” is highlighted, no added extra white spaces.
Expectations: when text is small enough to fit on one Line, the text edit shouldn’t expand in height, when the text needs to wrap, only the extra line width should be added not the maximum width.
if adjustSize(); is not called, the text will wrap on the width that was set in the .ui in the Creator, won't dynamically expand horizontally nor vertically..
Some Info:
Horizontal Policy: ExpandingVertical Policy : MinimumExpanding
minimumSize : 2×22maximum Size : 300×100lineWrapMode:
WidgetWidth
Yes, looks like there is no easy way to count lines in QTextEdit.
adjustSize() is made for QWidget and is not reimplemented for QTextEdit, it is based on sizeHint().
You can use your own method to count lines, f.e.
You can use QFontMetrics to calculate width of every word in your text
You can set height to 22 and increment it until maximumHeight hitted or vertical scrollbar dissapears.
You can get some info from sources of QTextEdit itself and subclass it, reimplementing something (adjustSize()?) there.
For example, we have a QLabel with MaximumWidth set to 400.
When we try to display some text with pixel width more than 400, it's shown cut off.
Is there any way to make QLabel display this string in multiple lines without using QFontMetrics or the like?
If I understood your question correctly, you should use the setWordWrap function for your label, with true as its parameter.
QLabel lbl("long long string");
lbl.setWordWrap(true);
In order to show multiple lines in QLabel, right click on QLabel and select 'change rich text'. This brings up dialog where you can type the text as you want to see including enter key. Setting the word wrap is not required for this.
If you set the word wrap as well (in QLabel properties) than it will wrap each individual line in the Qlabel if it was longer than the real estate.
As another option to wrap text using Qt Designer, you can check the box under Property Editor for a QLabel:
How can I get a QLabel to be resized even if it means truncating its containing text? I have a QLabel stretching the whole horizontal space of a Widget. When setting its text I make sure it is correctly truncated, ie getting its FontMetrics and Width and using metrics.elidedText().
But when the user resizes the widget the Label doesn't allow it to shrink any further since it would truncate its text.
Any ideas how to solve this? The simplest solution I think would be to somehow tell the QLabel to always shrink and then catch the resize event and correctly format the text - I just have no idea how to do the first part (different size policies don't help)
Although you mention that setting size policies didn't help, setting the QLabel's horizontal size policy to QSizePolicy::Ignored should tell the containing layout manager to ignore any minimum size hint from the label. An alternative would be to set the QLabel's minimum horizontal size to a non-zero value, like 1. If neither of these work then there is something else interfering.
I am now developing a Flex application in which I need to control each pixel of my control of Flex. I want to calculate that how width and how height of some text used in my control and do some layout stuff.After some searching I find that the only way to draw text in Flex is to use something like TextField. So, I use TextField to display text and try to get the width and height of the text through:
textfiled.getLineMetrics(0).width/.height;
But the real textfield is much more bigger than this, so I do:
textfield.width = textfiled.getLineMetrics(0).width;
textfield.height = textfiled.getLineMetrics(0).height;
But, the textfield get part not displayed, and I am surprised by this effect. I know there should be a 2-pixel gutter around the text, but what the remain space? Why nearly 20% part of the text height/width are not displayed?
And how can I get a real drawText call in Flex, I mean something like Windows's drawText method...
Thanks!
you can try this : getCharBoundaries () i've used it and seems accurate hoever it is for char and not a whole text so you will need to iterate through the text
also see this :
Is there a way to get the actual bounding box of a glyph in ActionScript?
Please try:
textfield.width = textfield.textWidth + 4;
textfield.height = textfield.textHeight + 4;
I'm not familiar with Windows's drawText method so I cannot help you there, but perhaps you want to have a look at the stellar text layout functionality in Flex 4.