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/* ScummVM - Scumm Interpreter
* Copyright (C) 2002-2003 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 "gui/dialog.h"
#include "gui/newgui.h"
namespace GUI {
/*
* TODO:
* - Auto-repeat: if user clicks & holds on one of the arrows, then after a
* brief delay, it should start to contiously scroll
* - Allow for a horizontal scrollbar, too?
* - If there are less items than fit on one pages, no scrolling can be done
* and we thus should not highlight the arrows/slider.
* - Allow the mouse wheel to scroll more than one line at a time
*/
#define UP_DOWN_BOX_HEIGHT 10
// Up arrow
static uint32 up_arrow[8] = {
0x00000000,
0x00000000,
0x00001000,
0x00001000,
0x00011100,
0x00011100,
0x00110110,
0x00100010,
};
// Down arrow
static uint32 down_arrow[8] = {
0x00000000,
0x00000000,
0x00100010,
0x00110110,
0x00011100,
0x00011100,
0x00001000,
0x00001000,
};
ScrollBarWidget::ScrollBarWidget(GuiObject *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 | WIDGET_WANT_TICKLE;
_type = kScrollBarWidget;
_part = kNoPart;
_sliderHeight = 0;
_sliderPos = 0;
_draggingPart = kNoPart;
_sliderDeltaMouseDownPos = 0;
_numEntries = 0;
_entriesPerPage = 0;
_currentPos = 0;
}
void ScrollBarWidget::handleMouseDown(int x, int y, int button, int clickCount) {
int old_pos = _currentPos;
// Do nothing if there are less items than fit on one page
if (_numEntries <= _entriesPerPage)
return;
if (y <= UP_DOWN_BOX_HEIGHT) {
// Up arrow
_currentPos--;
_draggingPart = kUpArrowPart;
} else if (y >= _h - UP_DOWN_BOX_HEIGHT) {
// Down arrow
_currentPos++;
_draggingPart = kDownArrowPart;
} else if (y < _sliderPos) {
_currentPos -= _entriesPerPage;
} else if (y >= _sliderPos + _sliderHeight) {
_currentPos += _entriesPerPage;
} else {
_draggingPart = kSliderPart;
_sliderDeltaMouseDownPos = y - _sliderPos;
}
// Make sure that _currentPos is still inside the bounds
checkBounds(old_pos);
}
void ScrollBarWidget::handleMouseUp(int x, int y, int button, int clickCount) {
_draggingPart = kNoPart;
}
void ScrollBarWidget::handleMouseWheel(int x, int y, int direction) {
int old_pos = _currentPos;
if (_numEntries < _entriesPerPage)
return;
if (direction < 0) {
_currentPos--;
} else {
_currentPos++;
}
// Make sure that _currentPos is still inside the bounds
checkBounds(old_pos);
}
void ScrollBarWidget::handleMouseMoved(int x, int y, int button) {
// Do nothing if there are less items than fit on one page
if (_numEntries <= _entriesPerPage)
return;
if (_draggingPart == kSliderPart) {
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)
_sliderPos = _h - UP_DOWN_BOX_HEIGHT - _sliderHeight;
_currentPos =
(_sliderPos - UP_DOWN_BOX_HEIGHT) * (_numEntries - _entriesPerPage) / (_h - 2 * UP_DOWN_BOX_HEIGHT - _sliderHeight);
checkBounds(old_pos);
} 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::handleTickle() {
/*
// FIXME/TODO - this code is supposed to allow for "click-repeat" (like key repeat),
// i.e. if you click on one of the arrows and keep clicked, it will scroll
// continuously. However, just like key repeat, this requires two delays:
// First an "initial" delay that has to pass before repeating starts (otherwise
// it is near to impossible to achieve single clicks). Secondly, a repeat delay
// that determines how often per second a click is simulated.
int old_pos = _currentPos;
if (_draggingPart == kUpArrowPart)
_currentPos--;
else if (_draggingPart == kDownArrowPart)
_currentPos++;
// Make sure that _currentPos is still inside the bounds
checkBounds(old_pos);
*/
}
void ScrollBarWidget::checkBounds(int old_pos) {
if (_numEntries <= _entriesPerPage || _currentPos < 0)
_currentPos = 0;
else if (_currentPos > _numEntries - _entriesPerPage)
_currentPos = _numEntries - _entriesPerPage;
if (old_pos != _currentPos) {
recalc();
draw();
sendCommand(kSetPositionCmd, _currentPos);
}
}
void ScrollBarWidget::recalc() {
if (_numEntries > _entriesPerPage) {
_sliderHeight = (_h - 2 * UP_DOWN_BOX_HEIGHT) * _entriesPerPage / _numEntries;
if (_sliderHeight < UP_DOWN_BOX_HEIGHT)
_sliderHeight = UP_DOWN_BOX_HEIGHT;
_sliderPos =
UP_DOWN_BOX_HEIGHT + (_h - 2 * UP_DOWN_BOX_HEIGHT - _sliderHeight) * _currentPos / (_numEntries - _entriesPerPage);
if (_sliderPos < 0)
_sliderPos = 0;
} else {
_sliderHeight = _h - 2 * UP_DOWN_BOX_HEIGHT;
_sliderPos = UP_DOWN_BOX_HEIGHT;
}
}
void ScrollBarWidget::drawWidget(bool hilite) {
NewGui *gui = &g_gui;
int bottomY = _y + _h;
bool isSinglePage = (_numEntries <= _entriesPerPage);
gui->frameRect(_x, _y, _w, _h, gui->_shadowcolor);
if (_draggingPart != kNoPart)
_part = _draggingPart;
// Up arrow
gui->frameRect(_x, _y, _w, UP_DOWN_BOX_HEIGHT, gui->_color);
gui->drawBitmap(up_arrow, _x, _y,
isSinglePage ? gui->_color :
(hilite && _part == kUpArrowPart) ? gui->_textcolorhi : gui->_textcolor);
// Down arrow
gui->frameRect(_x, bottomY - UP_DOWN_BOX_HEIGHT, _w, UP_DOWN_BOX_HEIGHT, gui->_color);
gui->drawBitmap(down_arrow, _x, bottomY - UP_DOWN_BOX_HEIGHT,
isSinglePage ? gui->_color :
(hilite && _part == kDownArrowPart) ? gui->_textcolorhi : gui->_textcolor);
// Slider
if (!isSinglePage) {
gui->fillRect(_x, _y + _sliderPos, _w, _sliderHeight,
(hilite && _part == kSliderPart) ? gui->_textcolorhi : gui->_textcolor);
gui->frameRect(_x, _y + _sliderPos, _w, _sliderHeight, gui->_color);
int y = _y + _sliderPos + _sliderHeight / 2;
NewGuiColor color = (hilite && _part == kSliderPart) ? gui->_color : gui->_shadowcolor;
gui->hLine(_x + 2, y - 2, _x + _w - 3, color);
gui->hLine(_x + 2, y, _x + _w - 3, color);
gui->hLine(_x + 2, y + 2, _x + _w-3, color);
}
}
} // End of namespace GUI
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