keyboard

问题 I have been trying to implement interactive keyboard like in 'iMessages' app Something like this; I need to continuously get exact frame of keyboard when sliding it up or down. I have already tried; keyboardWillChangeFrame, keyboardDidChangeFrame, keyboardWillShowForResizing, keyboardWillHideForResizing, keyboardWillShow, keyboardWillBeHidden None of them continuously return the frame. What is the best way to catch that frame? 回答1: That's a tricky & Simple. ViewController inherits UIResponder

问题 I know that with grabKeyboard() my widget is able to grab every keyboard event also if it's not focused, but what if I wanted to capture just three or four keys? I tried with an event filter http://doc.trolltech.com/3.3/qobject.html#installEventFilter but that didn't work (perhaps because I installed it like this?) class MyWidget: public QGLWidget { ... protected: bool eventFilter( QObject *o, QEvent *e ); }; bool MyWidget::eventFilter( QObject *o, QEvent *e ) { if ( e->type() == QEvent:

问题 I am building some kind of kiosk system and I bought this USB DIY keyboard for it: https://www.amazon.com/gp/product/B07QPXQQ7L This allows me to have a lot of buttons and they behave like keyboard keys. I'm writing a program (Perl) that will take the input from that keyboard and do things based on that. The problem is that I need to have the rest of the system (both X and the TTYs) ignore that keyboard so that it won't type random things in the terminal or in the window manager. In other

问题 I am building some kind of kiosk system and I bought this USB DIY keyboard for it: https://www.amazon.com/gp/product/B07QPXQQ7L This allows me to have a lot of buttons and they behave like keyboard keys. I'm writing a program (Perl) that will take the input from that keyboard and do things based on that. The problem is that I need to have the rest of the system (both X and the TTYs) ignore that keyboard so that it won't type random things in the terminal or in the window manager. In other

问题 There are a lot of questions about this. But they all talk about leaving the focus on a field. Here is my problem: I have a input type field. When the user clicks on it, it will open my custom mobiscroll feature. and in some cases like by Android 2.* or windows surface tablets it shows the virtual keyboard as well ! How can i code a case that the virtual keyboard will never appear ! Who can help me :) 回答1: To remove the keyboard you need to lose the focus on the active element. No other

问题 There are a lot of questions about this. But they all talk about leaving the focus on a field. Here is my problem: I have a input type field. When the user clicks on it, it will open my custom mobiscroll feature. and in some cases like by Android 2.* or windows surface tablets it shows the virtual keyboard as well ! How can i code a case that the virtual keyboard will never appear ! Who can help me :) 回答1: To remove the keyboard you need to lose the focus on the active element. No other

问题 I'm in the process of writing an 'touch-able' WPF Application for Windows 10. Imagine a window containing the following grid: <Grid> <Grid.RowDefinitions> <RowDefinition Height="Auto"></RowDefinition> <RowDefinition Height="*"></RowDefinition> <RowDefinition Height="Auto"></RowDefinition> </Grid.RowDefinitions> <TextBox Text="dsdsd"></TextBox> <TextBox Text="unten" Grid.Row="2" InputScope="Number"></TextBox> </Grid> If my application is compiled using at least .NET 4.6.2 and its window is

问题 Keyboard hook not firing events and throws win32 exception on dispose My c# application creates keyboard hook for processing of keyboard events(many card readers, scanners and other POS equipment emulates keyboard). Sometimes my application creates keyboard hook without errors, but it's not firings events and on dispose throws exception: System.ComponentModel.Win32Exception (0x80004005): Failed to remove keyboard hooks for 'app'. Error 1404: Invalid hook handle Other log entry is same error,

问题 My goal: I want my application to be able to respond to specific keyboard shortcuts/hotkeys regardless of whether it is the foreground window without interfering with other applications' use of these shortcuts. For instance, if another process has the foreground window and the user presses the VK_MEDIA_PLAY_PAUSE key, I want my application and the current foreground window to respond. This function is a user setting, so I'm not concerned about undesired behavior. Things I've tried that haven

问题 My goal: I want my application to be able to respond to specific keyboard shortcuts/hotkeys regardless of whether it is the foreground window without interfering with other applications' use of these shortcuts. For instance, if another process has the foreground window and the user presses the VK_MEDIA_PLAY_PAUSE key, I want my application and the current foreground window to respond. This function is a user setting, so I'm not concerned about undesired behavior. Things I've tried that haven