TextField Change Topic is solved

[rafae11]

i would want to set a variable to either true or false whenever i change a text field.
how do i do this?

[PB]

You Bind/Connect a wxEVT_COMMAND_TEXT_UPDATED event of wxTextCtrl(s) you're interested in.

By the way, are you aware that there is actually a decent official documentation for wxWidgets and a lot of code samples in wxWidgets's samples directory?

[rafae11]

I am aware thanks samples are a bit complicated for me. I am still learning the basics.

[xaviou]

Hi

You probably don't need a variable to do this : just check if your wxTextCtrl has been marked as modified :

Code: Select all

if (the_wxTextCtrl->IsModified())
{
    DoSomethingOrNot();
}

Regards
Xav'

[PB]

While xaviou's example works, if you need to be notified every time the value in the edit control(s) changes, you need to do something like this:

Code: Select all

#include <wx/wx.h>

class MyFrame : public wxFrame
{
public:
    MyFrame()
        : wxFrame(NULL, wxID_ANY, _("Test"))
    {        

        wxBoxSizer* bSizer = new wxBoxSizer(wxVERTICAL);

        wxTextCtrl* textCtrl = new wxTextCtrl(this, wxID_ANY, wxEmptyString, wxDefaultPosition, wxDefaultSize, wxTE_MULTILINE);
        bSizer->Add(textCtrl, 1, wxEXPAND);
        SetSizer(bSizer);        

       textCtrl->Bind(wxEVT_COMMAND_TEXT_UPDATED, &MyFrame::OnTextUpdated, this);  
                
        m_modified = false;
    }	
private:
    bool m_modified;
    void OnTextUpdated(wxCommandEvent& event)
    {
        // if you need to get wxTextCtrl* that initiated the event, you can do:
        // wxTextCtrl* textCtrl = dynamic_cast<wxTextCtrl*>(event.GetEventObject());                
        if ( !m_modified ) {
            m_modified = true;
            SetTitle(GetTitle().Append(wxS(" *"))); 
           // you need to set m_modified to false and remove the " *" from the title after saving a document etc.
        }
    }
};


class MyApp : public wxApp
{
public:	
	virtual bool OnInit()
	{
		if (!wxApp::OnInit())
			return false;       	

        MyFrame* frame = new MyFrame();
        frame ->Show();

        return true;
	}
};

IMPLEMENT_APP(MyApp)

If you're for some reason still using wxWidgets 2.8, replace line starting with "textCtrl->Bind" with

Code: Select all

textCtrl->Connect(wxEVT_COMMAND_TEXT_UPDATED, wxCommandEventHandler(MyFrame::OnTextUpdated), NULL, this);

[rafae11]

Thank for all the help I greatly appreciate it.