mirror of
https://github.com/TigerVNC/tigervnc.git
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47ed8d321c
git-svn-id: svn://svn.code.sf.net/p/tigervnc/code/trunk@2 3789f03b-4d11-0410-bbf8-ca57d06f2519
120 lines
3.6 KiB
C++
120 lines
3.6 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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// TXScrollbar.cxx
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//
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#include "TXScrollbar.h"
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#include <stdio.h>
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#include <assert.h>
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TXScrollbar::TXScrollbar(Display* dpy_, int width, int height, bool vert,
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TXScrollbarCallback* cb_, TXWindow* parent_)
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: TXWindow(dpy_, width, height, parent_), cb(cb_), vertical(vert),
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clickedInThumb(false)
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{
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setEventHandler(this);
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gc = XCreateGC(dpy, win(), 0, 0);
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addEventMask(ExposureMask | ButtonPressMask | ButtonReleaseMask |
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ButtonMotionMask);
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setBg(scrollbarBg);
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limit[0] = len[0] = limit[1] = len[1] = 1;
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start[0] = start[1] = 0;
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}
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TXScrollbar::~TXScrollbar()
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{
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XFreeGC(dpy, gc);
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}
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void TXScrollbar::set(int limit_, int start_, int len_, bool vert)
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{
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assert(limit_ > 0 && len_ >= 0 && len_ <= limit_);
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if (start_ < 0) start_ = 0;
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if (start_ > limit_ - len_) start_ = limit_ - len_;
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if (limit[vert] != limit_ || start[vert] != start_ || len[vert] != len_) {
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limit[vert] = limit_;
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start[vert] = start_;
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len[vert] = len_;
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paint();
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}
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}
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void TXScrollbar::paint()
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{
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int x = scaleToBarX(start[0]);
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int y = scaleToBarY(start[1]);
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int w = scaleToBarX(len[0]);
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int h = scaleToBarY(len[1]);
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if (y > 0) XClearArea(dpy, win(), 0, 0, 0, y, false);
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if (x > 0) XClearArea(dpy, win(), 0, y, x, y+h, false);
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XClearArea(dpy, win(), x+w, y, 0, y+h, false);
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XClearArea(dpy, win(), 0, y+h, 0, 0, false);
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drawBevel(gc, x, y, w, h, bevel, defaultBg, lightBg, darkBg);
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}
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void TXScrollbar::handleEvent(TXWindow* w, XEvent* ev)
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{
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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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{
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xDown = ev->xbutton.x;
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yDown = ev->xbutton.y;
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xStart = start[0];
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yStart = start[1];
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bool clickedInThumbX = false;
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if (xDown < scaleToBarX(start[0])) {
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set(limit[0], start[0] - len[0], len[0], false);
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} else if (xDown >= scaleToBarX(start[0]+len[0])) {
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set(limit[0], start[0] + len[0], len[0], false);
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} else {
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clickedInThumbX = true;
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}
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bool clickedInThumbY = false;
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if (yDown < scaleToBarY(start[1])) {
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set(limit[1], start[1] - len[1], len[1], true);
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} else if (yDown >= scaleToBarY(start[1]+len[1])) {
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set(limit[1], start[1] + len[1], len[1], true);
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} else {
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clickedInThumbY = true;
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}
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clickedInThumb = clickedInThumbX && clickedInThumbY;
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if (cb) cb->scrollbarPos(start[0], start[1], this);
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}
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break;
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case ButtonRelease:
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case MotionNotify:
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while (XCheckTypedWindowEvent(dpy, win(), MotionNotify, ev));
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if (clickedInThumb) {
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int dx = ev->xmotion.x - xDown;
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int dy = ev->xmotion.y - yDown;
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set(limit[0], xStart + barToScaleX(dx), len[0], false);
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set(limit[1], yStart + barToScaleY(dy), len[1], true);
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if (cb) cb->scrollbarPos(start[0], start[1], this);
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}
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break;
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}
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}
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