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QWidget Pixel Drawing
Posted In: Qt, Qt Tricks, Widgets
In very rare occasions, we want to draw individual pixels all over a widget. Custom painted widgets are much less common. But we can often get away with much easier painting than doing individual pixels. We draw these using lines, …
Read MoreQObject SignalBlocker
Sometimes you have to stop a class from emitting a signal for a while. One example that just came up on the Qt interest list was an application that modifies a file which it also monitors with a QFileSystemWatcher. You …
Read MoreCtrl +Enter Edit Handling
Posted In: Qt Tricks
I have a pet project where I’m doing some fun stuff with Qt scripting. To quickly test small script things, I implemented a simple window that have a QPlainTextEdit where I input a script, and an output window for what …
Read MorePrinting Parts of an XML Tree
Posted In: Qt Tricks
When debugging XML code, you often wonder about the contents of a subtree. If the tree is small, you can just print it. But when the XML tree gets big, this just isn’t very handy. Especially not if you are …
Read MoreCanonical Locale
Sometimes you need a fixed locale. One of my latest applications was reading and writing floats in XML, and the string parse and write routines for floats are locale dependent. So the XML file would either have “2,01” (US notation) …
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