Get friendly name from VK_ keycode?

[Dan203]

I'm porting an app from MFC to Qt. Right now we're using a hybrid approach and the main window is still MFC. We currently have a system where the user can define custom keyboard shortcuts which are then stored in the registry as VK_XXX keycodes. I need to leave the way the keys are stored as-is because I'm not ready to port the main window yet, but I'm working on porting the Options dialog over to Qt. So somehow I need to convert the VK_XXX code to a friendly name using Qt so I can display it in the QTreeWidget I use for displaying them in the options dialog. In the MFC code I use this...

UINT scanCode = MapVirtualKey(keyCode, MAPVK_VK_TO_VSC);

CString sKeyName;
int result = 0;
switch (keyCode)
{
	case VK_LEFT: case VK_UP: case VK_RIGHT: case VK_DOWN:
	case VK_PRIOR: case VK_NEXT:
	case VK_END: case VK_HOME:
	case VK_INSERT: case VK_DELETE:
	case VK_DIVIDE:
	case VK_NUMLOCK:
		scanCode |= KF_EXTENDED;
	default:
		result = GetKeyNameText(scanCode << 16, sKeyName.GetBuffer(128), 128);
		sKeyName.ReleaseBuffer();
}

return sKeyName;

Is there anyway to do the same thing in Qt? I just need some way to convert the VK_XXX code to a friendly name as a QString. I can't use that existing code because MapVirtualKey and GetKeyNameText both require winuser.h which causes all sorts of compile errors in my Qt dialog class.

[Pl45m4]

@Dan203 said in Get friendly name from VK_ keycode?:

Is there anyway to do the same thing in Qt? I just need some way to convert the VK_XXX code to a friendly name as a QString.

Hi, what about a simple QMap<QString, VK_Key> where VK_Key could be an enum with your settings?

• https://doc.qt.io/qt-5/qmap.html#details

Edit:

You could also combine the map with a Q_ENUM declared enum... Then you can easily translate your enum "key" to a real string (or QString) without dealing with the default enum ints.
(Maybe you dont even need the QMap then... just the enum and do the translation afterwards)

enum VK_Key {
  VK_LEFT,
  VK_UP,
  VK_RIGHT
};
Q_ENUM(VK_Key)

QMetaEnum vkEnum = QMetaEnum::fromType<YourClass::VK_Key>();
// With this metaEnum you can translate keys to "their" strings
QString string_left = vkEnum.valueToKey(YourClass::VK_LEFT);
// this could be mapped (if you need to) using a QMap to, "Left arrow key" or whatever description.

[Dan203]

@Pl45m4 said in Get friendly name from VK_ keycode?:

@Dan203 said in Get friendly name from VK_ keycode?:

Is there anyway to do the same thing in Qt? I just need some way to convert the VK_XXX code to a friendly name as a QString.

Hi, what about a simple QMap<QString, VK_Key> where VK_Key could be an enum with your settings?

• https://doc.qt.io/qt-5/qmap.html#details

Edit:

You could also combine the map with a Q_ENUM declared enum... Then you can easily translate your enum "key" to a real string (or QString) without dealing with the default enum ints.
(Maybe you dont even need the QMap then... just the enum and do the translation afterwards)

enum VK_Key {
  VK_LEFT,
  VK_UP,
  VK_RIGHT
};
Q_ENUM(VK_Key)

QMetaEnum vkEnum = QMetaEnum::fromType<YourClass::VK_Key>();
// With this metaEnum you can translate keys to "their" strings
QString string_left = vkEnum.valueToKey(YourClass::VK_LEFT);
// this could be mapped (if you need to) using a QMap to, "Left arrow key" or whatever description.

I found a map similar to this in the Qt source. Or more specifically one that converts from VK to a QKey value. I just don’t see anyway to access it from the main API. I'll just copy it if I need to, but I was hoping there was some official way to do this that I was just missing.

[Pl45m4]

@Dan203

Have you seen this?

[Dan203]

@Pl45m4 said in Get friendly name from VK_ keycode?:

@Dan203

Have you seen this?

Sounds similar, but nativeVirtualKey is used to convert from a QKey to a VK_ code, so it's the opposite of what I need. I need to convert the VK_ code to a QKey so I can use the QKeySequence::toString function to get the name of the key.

Once I convert the main window this wont matter, but that’s a big project and wont happen until the next major release. Right now I'm just trying to do as many of the secondary dialogs as I can.

[Dan203]

I ended up pulling the array from the windows keymapper cpp and filling in some of the gaps manually. I also had to subclass the QKeySequenceEdit control so that it worked properly with shifted characters. But now it's all working and I can move to the next dialog