[Interest] How to switch two Qt applications on Embedded Linux ?

Filip Piechocki fpiechocki at gmail.com
Mon May 26 11:41:07 CEST 2014

Do you have any window manager on your embedded device? What QPA plugin do
you use on your embedded device?

Filip Piechocki

On Mon, May 26, 2014 at 11:34 AM, Xubao Jiang <jiangxubao at gmail.com> wrote:

> Hi all,
> I meet an problem about switch two Qt applications on my Embedded Linux
> soc.
> I have written an application "Launcher", which will start other
> applications using QProcess. It calls hide() when the new app start, and
> calls show() when the new app is closed. This works normally.
> Now I want to the two applications can be alive at the same time. I tried
> to call hide() in the new app, and then send messages(D-Bus) to Launcher.
> When Launcher receives this message, it will call show(). But Launcher
> didn't show again, and the screen is black. After debugging, Launcher did
> receive the message and show() is called. I don't know why it doesn't
> display again.
> This method works normally on Ubuntu pc. I want to know if Qt embedded
> supports this feature or not? My Qt version is 5.0.2.
> One work round is to write one application to do all work, but it seems
> too complicated. Does anyone have met the same issue before? What is your
> solution for application management? Is one application the general
> solution for this?
> Best regards,
> Xubao
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