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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.
*/
//
// TXButton.h
//
// A TXButton is a clickable button with some text in it. The button must be
// big enough to contain the text - if not then it will be resized
// appropriately.
//
#ifndef __TXBUTTON_H__
#define __TXBUTTON_H__
#include "TXWindow.h"
#include <rfb/util.h>
// TXButtonCallback's buttonActivate() method is called when a button is
// activated.
class TXButton;
class TXButtonCallback {
public:
virtual void buttonActivate(TXButton* button)=0;
};
class TXButton : public TXWindow, public TXEventHandler {
public:
TXButton(Display* dpy_, const char* text_, TXButtonCallback* cb_=0,
TXWindow* parent_=0, int w=1, int h=1)
: TXWindow(dpy_, w, h, parent_), cb(cb_), down(false),
disabled_(false)
{
setEventHandler(this);
setText(text_);
gc = XCreateGC(dpy, win(), 0, 0);
XSetFont(dpy, gc, defaultFont);
addEventMask(ExposureMask | ButtonPressMask | ButtonReleaseMask);
}
virtual ~TXButton() {
XFreeGC(dpy, gc);
}
// setText() changes the text in the button.
void setText(const char* text_) {
text.buf = rfb::strDup(text_);
int textWidth = XTextWidth(defaultFS, text.buf, strlen(text.buf));
int textHeight = (defaultFS->ascent + defaultFS->descent);
int newWidth = __rfbmax(width(), textWidth + xPad*2 + bevel*2);
int newHeight = __rfbmax(height(), textHeight + yPad*2 + bevel*2);
if (width() < newWidth || height() < newHeight) {
resize(newWidth, newHeight);
}
}
// disabled() sets or queries the disabled state of the checkbox. A disabled
// checkbox cannot be changed via the user interface.
void disabled(bool b) { disabled_ = b; paint(); }
bool disabled() { return disabled_; }
private:
void paint() {
int tw = XTextWidth(defaultFS, text.buf, strlen(text.buf));
int startx = (width() - tw) / 2;
int starty = (height() + defaultFS->ascent - defaultFS->descent) / 2;
if (down || disabled_) {
drawBevel(gc, 0, 0, width(), height(), bevel, defaultBg, darkBg,lightBg);
startx++; starty++;
} else {
drawBevel(gc, 0, 0, width(), height(), bevel, defaultBg, lightBg,darkBg);
}
XSetForeground(dpy, gc, disabled_ ? disabledFg : defaultFg);
XDrawString(dpy, win(), gc, startx, starty, text.buf, strlen(text.buf));
}
virtual void handleEvent(TXWindow* w, XEvent* ev) {
switch (ev->type) {
case Expose:
paint();
break;
case ButtonPress:
if (!disabled_) {
down = true;
paint();
}
break;
case ButtonRelease:
if (!down) break;
down = false;
paint();
if (ev->xbutton.x >= 0 && ev->xbutton.x < width() &&
ev->xbutton.y >= 0 && ev->xbutton.y < height()) {
if (cb) cb->buttonActivate(this);
}
break;
}
}
GC gc;
rfb::CharArray text;
TXButtonCallback* cb;
bool down;
bool disabled_;
};
#endif
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