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Diffstat (limited to 'gui/ScrollBarWidget.cpp')
| -rw-r--r-- | gui/ScrollBarWidget.cpp | 157 |
1 files changed, 157 insertions, 0 deletions
diff --git a/gui/ScrollBarWidget.cpp b/gui/ScrollBarWidget.cpp new file mode 100644 index 0000000000..633a01f270 --- /dev/null +++ b/gui/ScrollBarWidget.cpp @@ -0,0 +1,157 @@ +/* ScummVM - Scumm Interpreter + * Copyright (C) 2002 The ScummVM project + * + * This program 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 program 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 program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. + * + * $Header$ + */ + +#include "stdafx.h" +#include "ScrollBarWidget.h" +#include "dialog.h" +#include "newgui.h" + + +/* + * TODO: + * - Dragging the slider with the mouse + * - Auto-repeast: if one clicks & holds on one of the arrows, then after a + * brief delay, it should start to contiously scroll + * - Allow for a horizontal scrollbar, too? + */ + + +// Up arrow +static uint32 up_arrow[8] = { + 0x00000000, + 0x00000000, + 0x00001000, + 0x00001000, + 0x00011100, + 0x00011100, + 0x00110110, + 0x00100010, +}; + +// Up arrow +static uint32 down_arrow[8] = { + 0x00000000, + 0x00000000, + 0x00100010, + 0x00110110, + 0x00011100, + 0x00011100, + 0x00001000, + 0x00001000, +}; + +ScrollBarWidget::ScrollBarWidget(Dialog *boss, int x, int y, int w, int h) + : Widget(boss, x, y, w, h), CommandSender(boss) +{ + _flags = WIDGET_ENABLED | WIDGET_TRACK_MOUSE | WIDGET_CLEARBG; + _type = kScrollBarWidget; + + _part = kNoPart; + +} + +void ScrollBarWidget::handleClick(int x, int y, int button) +{ + int old_pos = _currentPos; + if (y <= 10) { + // Up arrow + _currentPos--; + } else if (y >= _h-10) { + // Down arrow + _currentPos++; + } else if (y < _sliderPos) { + _currentPos -= _entriesPerPage; + } else if (y >= _sliderPos + _sliderHeight) { + _currentPos += _entriesPerPage; + } else { + printf("Slider\n"); + } + + // Bound checking + if (_currentPos > _numEntries - _entriesPerPage) + _currentPos = _numEntries - _entriesPerPage; + else if (_currentPos < 0) + _currentPos = 0; + + // Redraw & notify, but only if the position really changed + if (old_pos != _currentPos) { + recalc(); + draw(); + sendCommand(kSetPositionCmd, _currentPos); + } +} + +void ScrollBarWidget::handleMouseMoved(int x, int y, int button) +{ + int old_part = _part; + if (y <= 10) // Up arrow + _part = kUpArrowPart; + else if (y >= _h-10) // Down arrow + _part = kDownArrowPart; + else if (y < _sliderPos) + _part = kPageUpPart; + else if (y >= _sliderPos + _sliderHeight) + _part = kPageDownPart; + else + _part = kSliderPart; + + if (old_part != _part) + draw(); +} + +void ScrollBarWidget::recalc() +{ + _sliderHeight = (_h-20) * _entriesPerPage / _numEntries; + if (_sliderHeight < 4) + _sliderHeight = 4; + + _sliderPos = 10 + (_h-20-_sliderHeight+1) *_currentPos / (_numEntries - _entriesPerPage); + if (_sliderPos < 0) + _sliderPos = 0; + +} + + +void ScrollBarWidget::drawWidget(bool hilite) +{ + NewGui *gui = _boss->getGui(); + int bottomY = _y + _h; + + gui->frameRect(_x, _y, _w, _h, gui->_shadowcolor); + + // Up arrow + gui->frameRect(_x, _y, _w, 10, gui->_color); + gui->drawBitmap(up_arrow, _x, _y, + (hilite && _part == kUpArrowPart) ? gui->_textcolorhi : gui->_textcolor); + + // Down arrow + gui->frameRect(_x, bottomY - 9, _w, 10, gui->_color); + gui->drawBitmap(down_arrow, _x, bottomY - 9, + (hilite && _part == kDownArrowPart) ? gui->_textcolorhi : gui->_textcolor); + + // Slider + // FIXME - determine slider position and size. This depends on: + // * the number of entries per page + // * total number of entries + // * current scroll position (i.e. index of "first" visible entry) + gui->checkerRect(_x, _y + _sliderPos, _w, _sliderHeight, + (hilite && _part == kSliderPart) ? gui->_textcolorhi : gui->_textcolor); + gui->frameRect(_x, _y + _sliderPos, _w, _sliderHeight, gui->_color); +} |