123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124 |
- /* 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
|