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125 lines
3.6 KiB
C++
125 lines
3.6 KiB
C++
/* Copyright (C) 2002-2005 RealVNC Ltd. All Rights Reserved.
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*
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* This is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This software is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this software; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
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* USA.
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*/
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//
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// TXButton.h
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//
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// A TXButton is a clickable button with some text in it. The button must be
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// big enough to contain the text - if not then it will be resized
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// appropriately.
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//
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#ifndef __TXBUTTON_H__
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#define __TXBUTTON_H__
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#include "TXWindow.h"
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#include <rfb/util.h>
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// TXButtonCallback's buttonActivate() method is called when a button is
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// activated.
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class TXButton;
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class TXButtonCallback {
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public:
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virtual void buttonActivate(TXButton* button)=0;
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};
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class TXButton : public TXWindow, public TXEventHandler {
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public:
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TXButton(Display* dpy_, const char* text_, TXButtonCallback* cb_=0,
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TXWindow* parent_=0, int w=1, int h=1)
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: TXWindow(dpy_, w, h, parent_), cb(cb_), down(false),
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disabled_(false)
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{
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setEventHandler(this);
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setText(text_);
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gc = XCreateGC(dpy, win(), 0, 0);
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XSetFont(dpy, gc, defaultFont);
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addEventMask(ExposureMask | ButtonPressMask | ButtonReleaseMask);
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}
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virtual ~TXButton() {
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XFreeGC(dpy, gc);
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}
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// setText() changes the text in the button.
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void setText(const char* text_) {
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text.buf = rfb::strDup(text_);
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int textWidth = XTextWidth(defaultFS, text.buf, strlen(text.buf));
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int textHeight = (defaultFS->ascent + defaultFS->descent);
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int newWidth = __rfbmax(width(), textWidth + xPad*2 + bevel*2);
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int newHeight = __rfbmax(height(), textHeight + yPad*2 + bevel*2);
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if (width() < newWidth || height() < newHeight) {
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resize(newWidth, newHeight);
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}
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}
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// disabled() sets or queries the disabled state of the checkbox. A disabled
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// checkbox cannot be changed via the user interface.
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void disabled(bool b) { disabled_ = b; paint(); }
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bool disabled() { return disabled_; }
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private:
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void paint() {
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int tw = XTextWidth(defaultFS, text.buf, strlen(text.buf));
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int startx = (width() - tw) / 2;
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int starty = (height() + defaultFS->ascent - defaultFS->descent) / 2;
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if (down || disabled_) {
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drawBevel(gc, 0, 0, width(), height(), bevel, defaultBg, darkBg,lightBg);
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startx++; starty++;
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} else {
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drawBevel(gc, 0, 0, width(), height(), bevel, defaultBg, lightBg,darkBg);
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}
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XSetForeground(dpy, gc, disabled_ ? disabledFg : defaultFg);
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XDrawString(dpy, win(), gc, startx, starty, text.buf, strlen(text.buf));
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}
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virtual void handleEvent(TXWindow* w, XEvent* ev) {
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switch (ev->type) {
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case Expose:
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paint();
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break;
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case ButtonPress:
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if (!disabled_) {
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down = true;
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paint();
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}
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break;
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case ButtonRelease:
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if (!down) break;
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down = false;
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paint();
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if (ev->xbutton.x >= 0 && ev->xbutton.x < width() &&
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ev->xbutton.y >= 0 && ev->xbutton.y < height()) {
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if (cb) cb->buttonActivate(this);
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}
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break;
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}
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}
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GC gc;
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rfb::CharArray text;
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TXButtonCallback* cb;
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bool down;
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bool disabled_;
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};
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#endif
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