モーダルダイアログの生成

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#include <string>
 
#include <FL/Fl.H>
#include <FL/Fl_Window.H>
#include <FL/Fl_Input.H>
#include <FL/Fl_Scroll.H>
#include <FL/Fl_Button.H>
 
using namespace std;
 
//-----------------------------------------------------------------------------
//-----------------------------------------------------------------------------
class rxFlTextDialog : public Fl_Window
{
protected:
    Fl_Window *m_pParent;        Fl_Input *m_pInputText;     
public:
    string m_strText;
 
public:
        rxFlTextDialog(int w_, int h_, const char* title, const char* label, const char* text_label, void *parent)
        : Fl_Window(w_, h_, title), m_pInputText(0)
    {
        m_pParent = (Fl_Window*)parent;
        m_strText = "";
 
        int margin = 12;
        int xs, ys;
        int ws, hs;
 
        {
            Fl_Scroll *g = new Fl_Scroll(0, 0, w(), h()-40, 0);
            g->box(FL_FLAT_BOX);
 
            xs = margin;
            ys = margin;
            ws = w()-2.5*margin;
            hs = h()-(margin+50);
 
            //
                        //
            Fl_Group* sg = new Fl_Group(xs, ys, ws, hs, label);
            {
                sg->box(FL_DOWN_BOX);
                sg->labelsize(12);
                sg->align(FL_ALIGN_TOP | FL_ALIGN_INSIDE);
 
                int dx = strlen(text_label)*10;
                ys += 25;
                m_pInputText = new Fl_Input(xs+dx, ys, ws-(dx+margin*2), 25, text_label);
            
                sg->resizable(NULL);
                sg->end();
            }
        
            g->end();
            Fl_Group::current()->resizable(g);
        }
        {
            ws = 80;
            hs = 25;
            xs = w()-2*(ws+margin);
            ys = h()-(margin+hs);
 
            Fl_Button *button;
                
                        button = new Fl_Button(xs, ys, ws, hs, "OK");
            button->callback(OnButtonOK_s, this);
            button->down_box(FL_UP_BOX);
                
                        button = new Fl_Button(xs+(ws+margin), ys, ws, hs, "Cancel");
            button->callback(OnButtonCancel_s, this);
            button->down_box(FL_UP_BOX);
        }
 
        resizable(this);
        end();
    }
 
        ~rxFlTextDialog()
    {
        if(m_pInputText) delete m_pInputText;
    }
 
public:
        static void OnButtonOK_s(Fl_Widget *widget, void* x)
    {
        ((rxFlTextDialog*)x)->OnButtonOK();
    }
    inline void OnButtonOK(void)
    {
        m_strText = m_pInputText->value();
        hide();
    }
 
    static void OnButtonCancel_s(Fl_Widget *widget, void* x)
    {
        ((rxFlTextDialog*)x)->OnButtonCancel();
    }
    inline void OnButtonCancel(void)
    {
        hide();
    }
};

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    rxFlTextDialog *dlg = new rxFlTextDialog(300, 150, "title", "group", "value", this);
    dlg->set_modal();
    dlg->show();
    while(dlg->visible()){
        Fl::wait();
    }
 
    if(!dlg->m_strText.empty()){
        cout << "Input : " << dlg->m_strText << endl;
    }
 
    delete dlg;