QClipboard issues

[Anonymous_Banned275]

1. Per doc I shlould have only ONE
   QClipboard *clipboard = QGuiApplication::clipboard();
   in my application.
   My app is "subdirs" project , where should this line of code be ?
   At present I need clipboard only in one subproject.

2. The original MDI example has few preprocessor codes likes this one ,

#ifndef QT_NO_CLIPBOARD
......
#endif

but no
QClipboard *clipboard = QGuiApplication::clipboard();

3. AT present , when I move mouse into a text
   I get this error just moving into the text , no mouse click

QXcbClipboard: SelectionRequest too old
QXcbClipboard: SelectionRequest too old

4. My test code - compiles at that is all I get now

QClipboard *clipboard = QGuiApplication::clipboard();
QString originalText = clipboard->text();
QString newText ="Clipboard text test ";
clipboard->setText(newText);

[sierdzio]

@AnneRanch said in QClipboard issues:

My app is "subdirs" project , where should this line of code be ?

Everywhere where you need to access the clipboard. QGuiApplication is a singleton, which means that when you call QGuiApplication::clipboard() you are always accessing one, single instance of QClipboard. So you don't need to worry here, you can call it as much as you like.

2. The original MDI example has few preprocessor codes likes this one ,

#ifndef QT_NO_CLIPBOARD

You can ignore it. Prebuilt Qt is always compiled with clipboard support enabled - so you don't need these ifdefs.

3. AT present , when I move mouse into a text
   I get this error just moving into the text , no mouse click

No idea, sorry.

4. My test code - compiles at that is all I get now

Code looks good. I don't know why you read contents of the clipboard before setting them to something else, but I don't know your use case here.