wxGridSizer / wxPanel : make left/right navigation key behave like shift-tab/tab

问题

I am using a wxWidget. I have panel with 4 buttons and using wxGridSizer to put them in grid. When i go to the rightmost cell of the row and press Right key, focus remains on the same widget. Can i set some property where Right/Left keys at corner works as tab and shift-tab.

What i want is that user should be able to circle through the 4 buttons by just pressing left and right keys. I want to use up/down keys for other purpose.

Here is the code if it helps :

#include <wx/wx.h>
#include <wx/grid.h>
#include <wx/sizer.h>
#include <wx/string.h>

#include <iostream>
#include <cassert>

class ReachItFrame : public wxFrame
{
public:
  ReachItFrame(const wxString& title) : wxFrame()
  {
    Create(NULL, wxID_ANY, title, wxDefaultPosition, wxSize(250, 150));
  }
};

class MyApp : public wxApp
{
public:
  bool OnInit()
  {
    ReachItFrame *reachIt = new ReachItFrame(wxT("ReachIt"));
    reachIt->Show(true);
    assert(reachIt->SetTransparent(150));
    assert(reachIt->ShowFullScreen(true, wxFULLSCREEN_ALL));

    wxPanel *panel = new wxPanel(reachIt);
    wxGridSizer *sizer = new wxGridSizer(2, 2, 0, 0);

    wxButton *button1 = new wxButton(panel, wxID_ANY, wxString::FromAscii("1"));
    sizer->Add(button1, wxSizerFlags().Expand());

    wxButton *button2 = new wxButton(panel, wxID_ANY, wxString::FromAscii("2"));
    sizer->Add(button2, wxSizerFlags().Expand());

    wxButton *button3 = new wxButton(panel, wxID_ANY, wxString::FromAscii("3"));
    sizer->Add(button3, wxSizerFlags().Expand());

    wxButton *button4 = new wxButton(panel, wxID_ANY, wxString::FromAscii("4"));
    button4->MoveBeforeInTabOrder(button3);
    sizer->Add(button4, wxSizerFlags().Expand());

    panel->SetSizerAndFit(sizer);

    return true;
  }
};

wxIMPLEMENT_APP(MyApp);

回答1:

There is no built-in support for this, but you can catch WXK_RIGHT and WXK_LEFT yourself in your wxEVT_CHAR handler and do whatever you want there. You can look at wxGrid::DoGridProcessTab() for an example of what you might want to do, e.g. notice the helper MoveCursor{Left,Right}() and GoToCell() methods used there.

来源：https://stackoverflow.com/questions/46502297/wxgridsizer-wxpanel-make-left-right-navigation-key-behave-like-shift-tab-tab

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wxwidgets