Esc/Enter trap, input filtering, clipboard filtering

src/FrequencyDialog.cpp

@@ -1,23 +1,62 @@
 #include "FrequencyDialog.h"
 
-wxBEGIN_EVENT_TABLE(FrequencyDialog, wxDialog) wxEND_EVENT_TABLE()
+#include "wx/clipbrd.h"
+
+wxBEGIN_EVENT_TABLE(FrequencyDialog, wxDialog)
+EVT_CHAR_HOOK(FrequencyDialog::OnChar)
+wxEND_EVENT_TABLE()
 
 FrequencyDialog::FrequencyDialog(wxWindow * parent, wxWindowID id, const wxString & title, const wxPoint & position, const wxSize & size, long style) :
-        wxDialog(parent, id, title, position, size, style) {
+wxDialog(parent, id, title, position, size, style) {
     wxString freqStr = "105.7Mhz";
 
-    dialogText = new wxTextCtrl(this, -1, freqStr, wxPoint(6, 1), wxSize(size.GetWidth() - 20, size.GetHeight() - 70), wxTE_PROCESS_ENTER);
+    dialogText = new wxTextCtrl(this, wxID_FREQ_INPUT, freqStr, wxPoint(6, 1), wxSize(size.GetWidth() - 20, size.GetHeight() - 70), wxTE_PROCESS_ENTER);
     dialogText->SetFont(wxFont(20, wxFONTFAMILY_TELETYPE, wxFONTSTYLE_NORMAL, wxFONTWEIGHT_BOLD));
-    Connect(wxEVT_TEXT_ENTER, wxCommandEventHandler(FrequencyDialog::OnEnter));
-
-    SetEscapeId(wxID_CANCEL);
 
     Centre();
 
     dialogText->SetSelection(-1, -1);
 }
 
-void FrequencyDialog::OnEnter(wxCommandEvent &event) {
-    std::cout << dialogText->GetValue().ToStdString() << std::endl;
-    Close();
+std::string& FrequencyDialog::filterChars(std::string& s, const std::string& allowed) {
+    s.erase(remove_if(s.begin(), s.end(), [&allowed](const char& c) {
+        return allowed.find(c) == std::string::npos;
+    }), s.end());
+    return s;
+}
+
+void FrequencyDialog::OnChar(wxKeyEvent& event) {
+    wxChar c = event.GetKeyCode();
+
+    switch (c) {
+    case WXK_RETURN:
+    case WXK_NUMPAD_ENTER:
+        // Do Stuff
+
+        Close();
+        break;
+    case WXK_ESCAPE:
+        Close();
+        break;
+    }
+
+    std::string allowed("0123456789.MKGHZmkghz");
+
+    if (allowed.find_first_of(c) != std::string::npos || c == WXK_BACK) {
+        event.DoAllowNextEvent();
+    } else if (event.ControlDown() && c == 'V') {
+        // Alter clipboard contents to remove unwanted chars
+        wxTheClipboard->Open();
+        wxTextDataObject data;
+        wxTheClipboard->GetData(data);
+        std::string clipText = data.GetText().ToStdString();
+        std::string pasteText = filterChars(clipText,std::string(allowed));
+        wxTheClipboard->SetData(new wxTextDataObject(pasteText));
+        wxTheClipboard->Close();
+        event.Skip();
+    } else if (c == WXK_RIGHT || c == WXK_LEFT || event.ControlDown()) {
+        event.Skip();
+    } else {
+        std::cout << (int) c << std::endl;
+    }
 }

src/FrequencyDialog.h

@@ -5,6 +5,7 @@
 #include "wx/string.h"
 #include "wx/button.h"
 
+#define wxID_FREQ_INPUT 3001
 
 class FrequencyDialog: public wxDialog
 {
@@ -20,6 +21,8 @@ public:
 private:
 
     void OnEnter ( wxCommandEvent &event );
+    void OnChar ( wxKeyEvent &event );
+    std::string& filterChars(std::string& s, const std::string& allowed);
 
     DECLARE_EVENT_TABLE()
 };