Event filters are not working (i am testing on linux x64), when i try it on a QPlainTe

Event filters are not working about qt HOT 2 CLOSED

therecipe commented on May 10, 2024 1

Event filters are not working

from qt.

Comments (2)

therecipe commented on May 10, 2024 1

Hey

Here is some code that should work.
It intercepts the events that are send to the textEdit, so you can inspect them with the filterObject.
And here are some general infos about event filters.

Also you need to you run the [YOUR_PROJECT]/deploy/linux/[YOUR_PROJECT].sh file after you ran qtdeploy build/test desktop YOUR_PROJECT, otherwise you won't see anything in the terminal/shell.

Maybe you should also take a look at these examples and the qt docs.

Feel free to ask, if you run into any problems :)

package main

import (
    "os"

    "github.com/therecipe/qt/core"
    "github.com/therecipe/qt/gui"
    "github.com/therecipe/qt/widgets"
)

func main() {
    widgets.NewQApplication(len(os.Args), os.Args)

    var filterObject = core.NewQObject(nil)
    filterObject.ConnectEventFilter(func(watched *core.QObject, event *core.QEvent) bool {

        if event.Type() == core.QEvent__KeyPress {
            var keyEvent = gui.NewQKeyEventFromPointer(event.Pointer()) //like static_cast
            //var textEdit = widgets.NewQPlainTextEditFromPointer(watched.Pointer())

            if keyEvent.Key() == int(core.Qt__Key_Tab) {
                println("filterObject:", "special tab handling")
                return true
            }

            println("filterObject:", keyEvent.Text())
            return false
        }

        return false
    })

    var textEdit = widgets.NewQPlainTextEdit(nil)
    textEdit.InstallEventFilter(filterObject)
    textEdit.ConnectKeyPressEvent(func(event *gui.QKeyEvent) {
        println("textEdit:", event.Text())

        //do something here

        textEdit.KeyPressEventDefault(event) //call default implementation (always suffixed with *Default)
    })

    textEdit.Show()

    widgets.QApplication_Exec()
}