136 lines
4.6 KiB
C++
136 lines
4.6 KiB
C++
/* ScummVM - Graphic Adventure Engine
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*
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* ScummVM is the legal property of its developers, whose names
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* are too numerous to list here. Please refer to the COPYRIGHT
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* file distributed with this source distribution.
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*
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* This program 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 3 of the License, or
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* (at your option) any later version.
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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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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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*/
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#include "engines/nancy/nancy.h"
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#include "engines/nancy/graphics.h"
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#include "engines/nancy/input.h"
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#include "engines/nancy/cursor.h"
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#include "engines/nancy/ui/scrollbar.h"
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namespace Nancy {
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namespace UI {
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Scrollbar::Scrollbar(uint16 zOrder, const Common::Rect &srcBounds, const Common::Point &topPosition, uint16 scrollDistance, bool isVertical) :
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Scrollbar(zOrder, srcBounds, g_nancy->_graphics->_object0, topPosition, scrollDistance, isVertical) {}
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Scrollbar::Scrollbar(uint16 zOrder, const Common::Rect &srcBounds, Graphics::ManagedSurface &srcSurf, const Common::Point &topPosition, uint16 scrollDistance, bool isVertical) :
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RenderObject(zOrder),
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_isVertical(isVertical),
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_isClicked(false),
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_currentPosition(0),
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_maxDist(scrollDistance) {
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_drawSurface.create(srcSurf, srcBounds);
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_startPosition = topPosition;
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_startPosition.x -= srcBounds.width() / 2;
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if (!isVertical) {
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_startPosition.y -= srcBounds.height() / 2;
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}
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_screenPosition = srcBounds;
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_screenPosition.moveTo(_startPosition);
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}
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void Scrollbar::init() {
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setTransparent(true);
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RenderObject::init();
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}
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void Scrollbar::handleInput(NancyInput &input) {
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// Note: the original engine's scrollbars only work if the cursor is inside
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// the hotspot (happens if we remove the _isClicked check below). This doesn't make
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// for great UX, however, so it has been fixed.
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if (_screenPosition.contains(input.mousePos) || _isClicked) {
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g_nancy->_cursor->setCursorType(CursorManager::kHotspotArrow);
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if (input.input & NancyInput::kLeftMouseButtonDown && !_isClicked) {
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// Begin click and hold
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_isClicked = true;
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_mousePosOnClick = input.mousePos - Common::Point(_screenPosition.left, _screenPosition.top);
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}
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if (input.input & NancyInput::kRightMouseButtonUp) {
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// Right click, reset position
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resetPosition();
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}
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if (_isClicked) {
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// Is currently clicked, handle movement
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Common::Point newMousePos = input.mousePos - Common::Point(_screenPosition.left, _screenPosition.top);
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if (newMousePos != _mousePosOnClick) {
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if (_isVertical) {
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uint16 minY = _startPosition.y;
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uint16 maxY = minY + _maxDist;
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uint16 newTop = CLIP<uint16>((_screenPosition.top + newMousePos.y - _mousePosOnClick.y), minY, maxY);
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moveTo(Common::Point(_screenPosition.left, newTop));
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} else {
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uint16 minX = _startPosition.x;
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uint16 maxX = minX + _maxDist;
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uint16 newLeft = CLIP<uint16>((_screenPosition.left + newMousePos.x - _mousePosOnClick.x), minX, maxX);
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moveTo(Common::Point(newLeft, _screenPosition.top));
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}
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calculatePosition();
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}
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}
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}
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bool wasClicked = _isClicked;
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if (input.input & NancyInput::kLeftMouseButtonUp) {
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_isClicked = false;
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}
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// If the mouse is clicked and moves outside the scrollbar's hotspot, we don't want it
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// to trigger other events. This only works if scrollbars are at the very top of the input priority.
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// As a result, this effect won't be applied to the scrollbars in SoundEqualizerPuzzle
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// In the future, this can be fixed by creating an input queue inside InputManager.
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if (wasClicked) {
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input.eatMouseInput();
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}
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}
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void Scrollbar::setPosition(float pos) {
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_currentPosition = pos;
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if (_isVertical) {
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moveTo(Common::Point(_screenPosition.left, _startPosition.y + (_maxDist * pos)));
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} else {
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moveTo(Common::Point(_startPosition.x + (_maxDist * pos), _screenPosition.top));
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}
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}
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void Scrollbar::calculatePosition() {
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uint16 scroll = _isVertical ? _screenPosition.top - _startPosition.y : _screenPosition.left - _startPosition.x;
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_currentPosition = scroll != 0 ? (float)scroll / (float)_maxDist : 0;
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}
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void Scrollbar::resetPosition() {
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moveTo(Common::Point(_screenPosition.left, _startPosition.y));
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calculatePosition();
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}
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} // End of namespace UI
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} // End of namespace Nancy
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