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/* 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?
*/
#define UP_DOWN_BOX_HEIGHT 10
// 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;
_isDraggingSlider = false;
}
void ScrollBarWidget::handleClick(int x, int y, int button)
{
int old_pos = _currentPos;
if (y <= UP_DOWN_BOX_HEIGHT) {
// Up arrow
_currentPos--;
} else if (y >= _h - UP_DOWN_BOX_HEIGHT) {
// Down arrow
_currentPos++;
} else if (y < _sliderPos) {
_currentPos -= _entriesPerPage;
} else if (y >= _sliderPos + _sliderHeight) {
_currentPos += _entriesPerPage;
} else {
_isDraggingSlider = true;
_sliderDeltaMouseDownPos = y - _sliderPos;
}
// Make sure that _currentPos is still inside the bounds
checkbounds();
if (old_pos != _currentPos) {
recalc();
draw();
sendCommand(kSetPositionCmd, _currentPos);
}
}
void ScrollBarWidget::handleMouseMoved(int x, int y, int button)
{
if (button == 0)
_isDraggingSlider = false;
if (_isDraggingSlider) {
int old_pos = _currentPos;
_sliderPos = y - _sliderDeltaMouseDownPos;
if (_sliderPos < UP_DOWN_BOX_HEIGHT)
_sliderPos = UP_DOWN_BOX_HEIGHT;
if (_sliderPos > _h - UP_DOWN_BOX_HEIGHT - _sliderHeight + 1)
_sliderPos = _h - UP_DOWN_BOX_HEIGHT - _sliderHeight + 1;
_currentPos =
(_sliderPos - UP_DOWN_BOX_HEIGHT) * (_numEntries - _entriesPerPage) / (_h - _sliderHeight -
2 * UP_DOWN_BOX_HEIGHT);
checkbounds();
if (_currentPos != old_pos) {
draw();
sendCommand(kSetPositionCmd, _currentPos);
}
} else {
int old_part = _part;
if (y <= UP_DOWN_BOX_HEIGHT) // Up arrow
_part = kUpArrowPart;
else if (y >= _h - UP_DOWN_BOX_HEIGHT) // 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::checkbounds()
{
if (_currentPos > _numEntries - _entriesPerPage)
_currentPos = _numEntries - _entriesPerPage;
else if (_currentPos < 0)
_currentPos = 0;
}
void ScrollBarWidget::recalc()
{
_sliderHeight = (_h - 2 * UP_DOWN_BOX_HEIGHT) * _entriesPerPage / _numEntries;
if (_sliderHeight < 4)
_sliderHeight = 4;
_sliderPos =
UP_DOWN_BOX_HEIGHT + (_h - 2 * UP_DOWN_BOX_HEIGHT - _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, UP_DOWN_BOX_HEIGHT, gui->_color);
gui->drawBitmap(up_arrow, _x, _y,
(hilite && _part == kUpArrowPart) ? gui->_textcolorhi : gui->_textcolor);
// Down arrow
gui->frameRect(_x, bottomY - UP_DOWN_BOX_HEIGHT + 1, _w, UP_DOWN_BOX_HEIGHT, gui->_color);
gui->drawBitmap(down_arrow, _x, bottomY - UP_DOWN_BOX_HEIGHT + 1,
(hilite && _part == kDownArrowPart) ? gui->_textcolorhi : gui->_textcolor);
// Slider
gui->checkerRect(_x, _y + _sliderPos, _w, _sliderHeight,
(hilite && _part == kSliderPart) ? gui->_textcolorhi : gui->_textcolor);
gui->frameRect(_x, _y + _sliderPos, _w, _sliderHeight, gui->_color);
}
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