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/* Copyright (C) 2002-2005 RealVNC Ltd. All Rights Reserved.
*
* This is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this software; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
* USA.
*/
//
// TXEntry.h
//
// A TXEntry allows you to enter a single line of text in a window. The entry
// must be tall enough to contain a line of text - if not then it will be
// resized appropriately. If the passwd argument to the constructor is true,
// then the text in the entry will be replaced by asterisks on the screen.
//
#ifndef __TXENTRY_H__
#define __TXENTRY_H__
#include "TXWindow.h"
#include <X11/keysym.h>
#ifndef XK_ISO_Left_Tab
#define XK_ISO_Left_Tab 0xFE20
#endif
#ifndef XK_KP_Delete
#define XK_KP_Delete 0xFF9F
#endif
// TXEntryCallback's entryCallback() method is called when one of three special
// key presses have happened: Enter/Return, forward tab, or backward tab.
class TXEntry;
class TXEntryCallback {
public:
enum Detail { ENTER, NEXT_FOCUS, PREV_FOCUS };
virtual void entryCallback(TXEntry* entry, Detail detail, Time time)=0;
};
class TXEntry : public TXWindow, public TXEventHandler {
public:
TXEntry(Display* dpy_, TXEntryCallback* cb_=0,
TXWindow* parent_=0, bool passwd_=false, int w=1, int h=1)
: TXWindow(dpy_, w, h, parent_), cb(cb_),
passwd(passwd_), disabled_(false), gotFocus(false)
{
setEventHandler(this);
gc = XCreateGC(dpy, win(), 0, 0);
addEventMask(ExposureMask | KeyPressMask | FocusChangeMask
| ButtonPressMask);
text[0] = 0;
int textHeight = (defaultFS->ascent + defaultFS->descent);
int newHeight = __rfbmax(height(), textHeight + yPad*2 + bevel*2);
if (height() < newHeight) {
resize(width(), newHeight);
}
}
virtual ~TXEntry() {
XFreeGC(dpy, gc);
// overwrite memory used to store password - not critical, but can avoid
// accidental exposure of a password in uninitialised memory.
if (passwd)
memset(text, 0, maxLen);
}
// getText() gets the text in the entry.
const char* getText() { return text; }
// setText() sets the text in the entry.
void setText(const char* text_) {
strncpy(text, text_, maxLen-1);
text[maxLen-1] = 0;
paint();
}
// disabled() sets or queries the disabled state of the entry. A disabled
// entry cannot have text entered into it.
void disabled(bool b) { disabled_ = b; paint(); }
bool disabled() { return disabled_; }
private:
void paint() {
if (disabled_)
drawBevel(gc, 0, 0, width(), height(), bevel, disabledBg,darkBg,lightBg);
else
drawBevel(gc, 0, 0, width(), height(), bevel, enabledBg, darkBg,lightBg);
char* str = text;
char stars[maxLen];
if (passwd) {
int i;
for (i = 0; i < (int)strlen(text); i++) stars[i] = '*';
stars[i] = 0;
str = stars;
}
int tw = XTextWidth(defaultFS, str, strlen(str));
int startx = bevel + xPad;
if (startx + tw > width() - 2*bevel) {
startx = width() - 2*bevel - tw;
}
XDrawString(dpy, win(), defaultGC, startx,
(height() + defaultFS->ascent - defaultFS->descent) / 2,
str, strlen(str));
if (!disabled_ && gotFocus)
XDrawLine(dpy, win(), defaultGC, startx+tw,
(height() - defaultFS->ascent - defaultFS->descent) / 2,
startx+tw,
(height() + defaultFS->ascent + defaultFS->descent) / 2);
}
virtual void handleEvent(TXWindow* w, XEvent* ev) {
switch (ev->type) {
case Expose:
paint();
break;
case FocusIn:
gotFocus = true;
paint();
break;
case FocusOut:
gotFocus = false;
paint();
break;
case ButtonPress:
if (!disabled_)
XSetInputFocus(dpy, win(), RevertToParent, ev->xbutton.time);
break;
case KeyPress:
{
if (disabled_ || !gotFocus) break;
KeySym keysym;
XComposeStatus compose;
char buf[10];
int count = XLookupString(&ev->xkey, buf, 10, &keysym, &compose);
if (count >= 1 && buf[0] >= ' ' && buf[0] <= '~') {
if (strlen(text) + count >= maxLen) {
XBell(dpy, 0);
} else {
strncat(text, buf, count);
paint();
}
} else if (keysym == XK_BackSpace || keysym == XK_Delete ||
keysym == XK_KP_Delete) {
if (strlen(text) > 0) {
text[strlen(text)-1] = 0;
paint();
}
} else if (keysym == XK_Return || keysym == XK_KP_Enter ||
keysym == XK_Linefeed) {
if (cb) cb->entryCallback(this, TXEntryCallback::ENTER,
ev->xkey.time);
} else if ((keysym == XK_Tab || keysym == XK_KP_Tab)
&& !(ev->xkey.state & ShiftMask))
{
if (cb) cb->entryCallback(this, TXEntryCallback::NEXT_FOCUS,
ev->xkey.time);
} else if (((keysym == XK_Tab || keysym == XK_KP_Tab)
&& (ev->xkey.state & ShiftMask))
|| keysym == XK_ISO_Left_Tab)
{
if (cb) cb->entryCallback(this, TXEntryCallback::PREV_FOCUS,
ev->xkey.time);
}
}
}
}
GC gc;
enum { maxLen = 256 };
char text[maxLen];
TXEntryCallback* cb;
bool passwd;
bool disabled_;
bool gotFocus;
};
#endif
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