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https://github.com/TigerVNC/tigervnc.git
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![Constantin Kaplinsky](/assets/img/avatar_default.png)
git-svn-id: svn://svn.code.sf.net/p/tigervnc/code/trunk@2 3789f03b-4d11-0410-bbf8-ca57d06f2519
143 lines
4.7 KiB
C++
143 lines
4.7 KiB
C++
/* Copyright (C) 2002-2003 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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// TXCheckbox.h
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//
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// A TXCheckbox has a box which may be "checked" with some text next to it.
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// The checkbox window must be big enough to contain the text - if not then it
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// will be resized appropriately.
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//
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// There are two styles of checkbox: the normal style which uses a tick in a
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// square box, and the radio style which uses a dot inside a circle. The
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// default behaviour when clicking on the checkbox is to toggle it on or off,
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// but this behaviour can be changed by the callback object. In particular to
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// get radiobutton behaviour, the callback must ensure that only one of a set
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// of radiobuttons is selected.
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//
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#ifndef __TXCHECKBOX_H__
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#define __TXCHECKBOX_H__
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#include "TXWindow.h"
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#include <rfb/util.h>
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// TXCheckboxCallback's checkboxSelect() method is called when the state of a
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// checkbox changes.
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class TXCheckbox;
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class TXCheckboxCallback {
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public:
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virtual void checkboxSelect(TXCheckbox* checkbox)=0;
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};
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class TXCheckbox : public TXWindow, public TXEventHandler {
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public:
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TXCheckbox(Display* dpy_, const char* text_, TXCheckboxCallback* cb_,
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bool radio_=false, TXWindow* parent_=0, int w=1, int h=1)
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: TXWindow(dpy_, w, h, parent_), cb(cb_), text(0),
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boxSize(radio_ ? 12 : 13), boxPad(4),
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checked_(false), disabled_(false), radio(radio_)
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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 ~TXCheckbox() {
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XFreeGC(dpy, gc);
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if (text) free(text);
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}
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// setText() changes the text in the checkbox.
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void setText(const char* text_) {
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if (text) free(text);
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text = strdup(text_);
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int textWidth = XTextWidth(defaultFS, text, strlen(text));
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int textHeight = (defaultFS->ascent + defaultFS->descent);
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int newWidth = max(width(), textWidth + xPad*2 + boxPad*2 + boxSize);
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int newHeight = max(height(), textHeight + yPad*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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// checked() sets or queries the state of the checkbox
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void checked(bool b) { checked_ = b; paint(); }
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bool checked() { return checked_; }
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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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if (disabled_)
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drawBevel(gc, xPad + boxPad, (height() - boxSize) / 2, boxSize, boxSize,
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bevel, disabledBg, darkBg, lightBg, radio);
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else
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drawBevel(gc, xPad + boxPad, (height() - boxSize) / 2, boxSize, boxSize,
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bevel, enabledBg, darkBg, lightBg, radio);
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XSetBackground(dpy, gc, disabled_ ? disabledBg : enabledBg);
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XSetForeground(dpy, gc, disabled_ ? disabledFg : defaultFg);
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if (checked_) {
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Pixmap icon = radio ? dot : tick;
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int iconSize = radio ? dotSize : tickSize;
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XCopyPlane(dpy, icon, win(), gc, 0, 0, iconSize, iconSize,
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xPad + boxPad + (boxSize - iconSize) / 2,
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(height() - iconSize) / 2, 1);
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}
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XDrawString(dpy, win(), gc, xPad + boxSize + boxPad*2,
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(height() + defaultFS->ascent - defaultFS->descent) / 2,
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text, strlen(text));
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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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break;
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case ButtonRelease:
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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 (!disabled_) {
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checked_ = !checked_;
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if (cb) cb->checkboxSelect(this);
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paint();
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}
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}
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break;
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}
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}
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TXCheckboxCallback* cb;
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GC gc;
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char* text;
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int boxSize;
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int boxPad;
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bool checked_;
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bool disabled_;
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bool radio;
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};
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#endif
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