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252 lines
7.0 KiB
C++
252 lines
7.0 KiB
C++
/* ScummVM - Scumm Interpreter
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* Copyright (C) 2002-2003 The ScummVM project
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program 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 program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*
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* $Header$
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*/
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#include "stdafx.h"
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#include "ScrollBarWidget.h"
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#include "gui/dialog.h"
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#include "gui/newgui.h"
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namespace GUI {
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/*
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* TODO:
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* - Auto-repeat: if user clicks & holds on one of the arrows, then after a
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* brief delay, it should start to contiously scroll
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* - Allow for a horizontal scrollbar, too?
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* - If there are less items than fit on one pages, no scrolling can be done
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* and we thus should not highlight the arrows/slider.
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* - Allow the mouse wheel to scroll more than one line at a time
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*/
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#define UP_DOWN_BOX_HEIGHT 10
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// Up arrow
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static uint32 up_arrow[8] = {
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0x00000000,
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0x00000000,
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0x00001000,
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0x00001000,
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0x00011100,
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0x00011100,
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0x00110110,
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0x00100010,
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};
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// Down arrow
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static uint32 down_arrow[8] = {
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0x00000000,
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0x00000000,
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0x00100010,
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0x00110110,
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0x00011100,
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0x00011100,
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0x00001000,
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0x00001000,
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};
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ScrollBarWidget::ScrollBarWidget(GuiObject *boss, int x, int y, int w, int h)
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: Widget (boss, x, y, w, h), CommandSender(boss) {
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_flags = WIDGET_ENABLED | WIDGET_TRACK_MOUSE | WIDGET_CLEARBG | WIDGET_WANT_TICKLE;
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_type = kScrollBarWidget;
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_part = kNoPart;
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_sliderHeight = 0;
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_sliderPos = 0;
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_draggingPart = kNoPart;
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_sliderDeltaMouseDownPos = 0;
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_numEntries = 0;
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_entriesPerPage = 0;
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_currentPos = 0;
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}
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void ScrollBarWidget::handleMouseDown(int x, int y, int button, int clickCount) {
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int old_pos = _currentPos;
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// Do nothing if there are less items than fit on one page
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if (_numEntries <= _entriesPerPage)
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return;
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if (y <= UP_DOWN_BOX_HEIGHT) {
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// Up arrow
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_currentPos--;
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_draggingPart = kUpArrowPart;
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} else if (y >= _h - UP_DOWN_BOX_HEIGHT) {
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// Down arrow
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_currentPos++;
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_draggingPart = kDownArrowPart;
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} else if (y < _sliderPos) {
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_currentPos -= _entriesPerPage;
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} else if (y >= _sliderPos + _sliderHeight) {
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_currentPos += _entriesPerPage;
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} else {
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_draggingPart = kSliderPart;
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_sliderDeltaMouseDownPos = y - _sliderPos;
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}
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// Make sure that _currentPos is still inside the bounds
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checkBounds(old_pos);
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}
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void ScrollBarWidget::handleMouseUp(int x, int y, int button, int clickCount) {
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_draggingPart = kNoPart;
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}
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void ScrollBarWidget::handleMouseWheel(int x, int y, int direction) {
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int old_pos = _currentPos;
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if (_numEntries < _entriesPerPage)
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return;
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if (direction < 0) {
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_currentPos--;
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} else {
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_currentPos++;
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}
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// Make sure that _currentPos is still inside the bounds
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checkBounds(old_pos);
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}
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void ScrollBarWidget::handleMouseMoved(int x, int y, int button) {
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// Do nothing if there are less items than fit on one page
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if (_numEntries <= _entriesPerPage)
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return;
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if (_draggingPart == kSliderPart) {
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int old_pos = _currentPos;
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_sliderPos = y - _sliderDeltaMouseDownPos;
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if (_sliderPos < UP_DOWN_BOX_HEIGHT)
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_sliderPos = UP_DOWN_BOX_HEIGHT;
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if (_sliderPos > _h - UP_DOWN_BOX_HEIGHT - _sliderHeight)
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_sliderPos = _h - UP_DOWN_BOX_HEIGHT - _sliderHeight;
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_currentPos =
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(_sliderPos - UP_DOWN_BOX_HEIGHT) * (_numEntries - _entriesPerPage) / (_h - 2 * UP_DOWN_BOX_HEIGHT - _sliderHeight);
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checkBounds(old_pos);
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} else {
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int old_part = _part;
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if (y <= UP_DOWN_BOX_HEIGHT) // Up arrow
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_part = kUpArrowPart;
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else if (y >= _h - UP_DOWN_BOX_HEIGHT) // Down arrow
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_part = kDownArrowPart;
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else if (y < _sliderPos)
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_part = kPageUpPart;
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else if (y >= _sliderPos + _sliderHeight)
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_part = kPageDownPart;
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else
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_part = kSliderPart;
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if (old_part != _part)
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draw();
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}
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}
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void ScrollBarWidget::handleTickle() {
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/*
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// FIXME/TODO - this code is supposed to allow for "click-repeat" (like key repeat),
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// i.e. if you click on one of the arrows and keep clicked, it will scroll
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// continuously. However, just like key repeat, this requires two delays:
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// First an "initial" delay that has to pass before repeating starts (otherwise
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// it is near to impossible to achieve single clicks). Secondly, a repeat delay
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// that determines how often per second a click is simulated.
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int old_pos = _currentPos;
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if (_draggingPart == kUpArrowPart)
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_currentPos--;
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else if (_draggingPart == kDownArrowPart)
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_currentPos++;
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// Make sure that _currentPos is still inside the bounds
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checkBounds(old_pos);
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*/
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}
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void ScrollBarWidget::checkBounds(int old_pos) {
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if (_numEntries <= _entriesPerPage || _currentPos < 0)
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_currentPos = 0;
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else if (_currentPos > _numEntries - _entriesPerPage)
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_currentPos = _numEntries - _entriesPerPage;
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if (old_pos != _currentPos) {
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recalc();
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draw();
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sendCommand(kSetPositionCmd, _currentPos);
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}
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}
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void ScrollBarWidget::recalc() {
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if (_numEntries > _entriesPerPage) {
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_sliderHeight = (_h - 2 * UP_DOWN_BOX_HEIGHT) * _entriesPerPage / _numEntries;
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if (_sliderHeight < UP_DOWN_BOX_HEIGHT)
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_sliderHeight = UP_DOWN_BOX_HEIGHT;
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_sliderPos =
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UP_DOWN_BOX_HEIGHT + (_h - 2 * UP_DOWN_BOX_HEIGHT - _sliderHeight) * _currentPos / (_numEntries - _entriesPerPage);
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if (_sliderPos < 0)
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_sliderPos = 0;
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} else {
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_sliderHeight = _h - 2 * UP_DOWN_BOX_HEIGHT;
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_sliderPos = UP_DOWN_BOX_HEIGHT;
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}
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}
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void ScrollBarWidget::drawWidget(bool hilite) {
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NewGui *gui = &g_gui;
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int bottomY = _y + _h;
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bool isSinglePage = (_numEntries <= _entriesPerPage);
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gui->frameRect(_x, _y, _w, _h, gui->_shadowcolor);
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if (_draggingPart != kNoPart)
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_part = _draggingPart;
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// Up arrow
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gui->frameRect(_x, _y, _w, UP_DOWN_BOX_HEIGHT, gui->_color);
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gui->drawBitmap(up_arrow, _x, _y,
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isSinglePage ? gui->_color :
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(hilite && _part == kUpArrowPart) ? gui->_textcolorhi : gui->_textcolor);
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// Down arrow
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gui->frameRect(_x, bottomY - UP_DOWN_BOX_HEIGHT, _w, UP_DOWN_BOX_HEIGHT, gui->_color);
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gui->drawBitmap(down_arrow, _x, bottomY - UP_DOWN_BOX_HEIGHT,
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isSinglePage ? gui->_color :
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(hilite && _part == kDownArrowPart) ? gui->_textcolorhi : gui->_textcolor);
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// Slider
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if (!isSinglePage) {
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gui->fillRect(_x, _y + _sliderPos, _w, _sliderHeight,
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(hilite && _part == kSliderPart) ? gui->_textcolorhi : gui->_textcolor);
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gui->frameRect(_x, _y + _sliderPos, _w, _sliderHeight, gui->_color);
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int y = _y + _sliderPos + _sliderHeight / 2;
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NewGuiColor color = (hilite && _part == kSliderPart) ? gui->_color : gui->_shadowcolor;
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gui->hLine(_x + 2, y - 2, _x + _w - 3, color);
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gui->hLine(_x + 2, y, _x + _w - 3, color);
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gui->hLine(_x + 2, y + 2, _x + _w-3, color);
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}
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}
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} // End of namespace GUI
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