> > Before I discuss caret behavior.
> > I have a further related issue (it's all bound up in the same widget).
>
> The Fl_Double_Window does not get keyboard focus by default. You can =
> achieve that by returning 1 for FL_FOCUS and FL_UNFOCUS events.
>
> Fl_Input_ and derived widgets and Fl_Text_Display do that for you.=
>
Apologies and thanks to Matthias for FOCUS:UNFOCUS:return 1 advice.
I had been cutting and splicing and didnt realise its importance.
Nevertheless there is STILL a PROBLEM. Sorry but I have to show
#include <FL/Fl.H>
#include <FL/Fl_Window.H>
#include <FL/Fl_Text_Display.H>
#define USING_CARET
class EventWindow : public Fl_Window
{
private:
Fl_Text_Buffer* mBuff;
Fl_Text_Display* mDisp;
bool mKeyPressed;
unsigned long mKey;
int handle_keydn(int event, int key, int state);
public:
EventWindow();
bool getKey(unsigned long& pKey);
int handle(int pEvent);
#ifdef USING_CARET
void showCaret(int pPos);
#endif
};
EventWindow::EventWindow() : Fl_Window(640,480,"Display")
{
mBuff = new Fl_Text_Buffer();
mDisp = new Fl_Text_Display(20,20,640-40,480-40);
mDisp->buffer(mBuff); add(*mDisp);
mBuff->text("line 0\nline 1\nline 2\nline 3\nline 4\nline 5\n");
mKeyPressed = false;
mKey = 0;
}
int EventWindow::handle(int pEvent)
{
switch (pEvent) {
case FL_FOCUS: case FL_UNFOCUS: case FL_KEYUP:
return 1;
case FL_KEYBOARD:
return handle_keydn(pEvent,Fl::event_key(),Fl::event_state());
default:
return Fl_Window::handle(pEvent);
};
}
int EventWindow::handle_keydn(int pEvent, int pKey,int pState)
{
printf("KeyDN Key = %d State = %d\n",pKey,pState);fflush(stdout);
mKey = (unsigned long)pState + (unsigned long)pKey;
mKeyPressed = true;
return 1;
}
bool EventWindow::getKey(unsigned long& pKey)
{
bool lRet = false;
if (mKeyPressed)
{
switch (mKey)
{
default:
pKey = mKey;
lRet = true;
case 0xFFE3: // left ctrl
case 0xFFE4: // righ ctrl
case 0xFFE9: // left alt
case 0xFFEA: // left alt
case 0xFFE1: // left shift
case 0xFFE2: // righ shift
break;
}
mKeyPressed = false;
mKey = 0;
}
return lRet;
}
#ifdef USING_CARET
void EventWindow::showCaret(int pPos)
{
mDisp->show_cursor(); // ENABLE CURSOR
mDisp->cursor_color(0xFF000000); // CURSOR RED
mDisp->cursor_style(Fl_Text_Display::HEAVY_CURSOR);
mDisp->insert_position(pPos); // POSITION
mDisp->take_focus(); // SHOW CARET ON STARTUP (EVEN IF NOT IN FOCUS)
}
#endif
int main()
{
EventWindow* win = new EventWindow();
win->show();
int lPos = 5;
#ifdef USING_CARET
win->showCaret(lPos);
#endif
int lRet = 0;
while (1)
{
lRet = Fl::wait();
unsigned long lKey = 0;
if (win->getKey(lKey))
{
++lPos;
printf(" lPos = %d\n",lPos);fflush(stdout);
#ifdef USING_CARET
win->showCaret(lPos);
#endif
}
if (!lRet)
{
break;
}
}
return Fl::run();
}
try commenting out #define USING_CARET
1) trap keys in (Fl_Window/Double_Window) using above etc, WORKS OK (all keys
produce keydown).
2) add Fl_Text_Display to (1) WORKS OK (all keys produce keydown).
3) add caret functionality using Greg's showCaret instructions
DOESN'T WORK (not all keys produce keydown). Is this related to take_focus()?
What is going on ??
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