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https://github.com/libretro/scummvm.git
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346d53b034
Previously it was only possible to specify whether items where aligned to the start or centered in the cross direction of the layouts. It is now additionally possible to align the items to the far end of the cross direction or to resize them to match the size of the layout. Terminology and behavior are loosely based on CSS's flexbox containers.
427 lines
12 KiB
C++
427 lines
12 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
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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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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*/
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#include "common/util.h"
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#include "common/system.h"
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#include "gui/gui-manager.h"
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#include "gui/widget.h"
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#include "gui/ThemeEval.h"
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#include "gui/ThemeLayout.h"
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#include "graphics/font.h"
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#ifdef LAYOUT_DEBUG_DIALOG
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#include "graphics/surface.h"
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#endif
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namespace GUI {
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void ThemeLayout::importLayout(ThemeLayout *layout) {
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assert(layout->getLayoutType() == kLayoutMain);
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if (layout->_children.size() == 0)
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return;
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layout = layout->_children[0];
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if (getLayoutType() == layout->getLayoutType()) {
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for (uint i = 0; i < layout->_children.size(); ++i)
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_children.push_back(layout->_children[i]->makeClone(this));
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} else {
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_children.push_back(layout->makeClone(this));
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}
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}
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void ThemeLayout::resetLayout() {
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_x = 0;
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_y = 0;
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_w = _defaultW;
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_h = _defaultH;
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for (uint i = 0; i < _children.size(); ++i)
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_children[i]->resetLayout();
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}
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bool ThemeLayout::getWidgetData(const Common::String &name, int16 &x, int16 &y, uint16 &w, uint16 &h) {
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if (name.empty()) {
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assert(getLayoutType() == kLayoutMain);
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x = _x; y = _y;
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w = _w; h = _h;
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return true;
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}
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for (uint i = 0; i < _children.size(); ++i) {
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if (_children[i]->getWidgetData(name, x, y, w, h))
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return true;
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}
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return false;
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}
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Graphics::TextAlign ThemeLayout::getWidgetTextHAlign(const Common::String &name) {
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if (name.empty()) {
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assert(getLayoutType() == kLayoutMain);
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return _textHAlign;
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}
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Graphics::TextAlign res;
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for (uint i = 0; i < _children.size(); ++i) {
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if ((res = _children[i]->getWidgetTextHAlign(name)) != Graphics::kTextAlignInvalid)
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return res;
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}
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return Graphics::kTextAlignInvalid;
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}
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int16 ThemeLayoutStacked::getParentWidth() {
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ThemeLayout *p = _parent;
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int width = 0;
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while (p && p->getLayoutType() != kLayoutMain) {
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width += p->_padding.right + p->_padding.left;
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if (p->getLayoutType() == kLayoutHorizontal) {
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const int spacing = ((ThemeLayoutStacked *)p)->_spacing;
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for (uint i = 0; i < p->_children.size(); ++i)
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width += p->_children[i]->getWidth() + spacing;
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}
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// FIXME: Do we really want to assume that any layout type different
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// from kLayoutHorizontal corresponds to width 0 ?
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p = p->_parent;
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}
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assert(p && p->getLayoutType() == kLayoutMain);
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return p->getWidth() - width;
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}
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int16 ThemeLayoutStacked::getParentHeight() {
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ThemeLayout *p = _parent;
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int height = 0;
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while (p && p->getLayoutType() != kLayoutMain) {
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height += p->_padding.bottom + p->_padding.top;
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if (p->getLayoutType() == kLayoutVertical) {
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const int spacing = ((ThemeLayoutStacked *)p)->_spacing;
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for (uint i = 0; i < p->_children.size(); ++i)
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height += p->_children[i]->getHeight() + spacing;
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}
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// FIXME: Do we really want to assume that any layout type different
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// from kLayoutVertical corresponds to height 0 ?
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p = p->_parent;
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}
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assert(p && p->getLayoutType() == kLayoutMain);
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return p->getHeight() - height;
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}
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#ifdef LAYOUT_DEBUG_DIALOG
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void ThemeLayout::debugDraw(Graphics::Surface *screen, const Graphics::Font *font) {
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uint32 color = 0xFFFFFFFF;
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font->drawString(screen, getName(), _x, _y, _w, color, Graphics::kTextAlignRight, 0, true);
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screen->hLine(_x, _y, _x + _w, color);
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screen->hLine(_x, _y + _h, _x + _w , color);
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screen->vLine(_x, _y, _y + _h, color);
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screen->vLine(_x + _w, _y, _y + _h, color);
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for (uint i = 0; i < _children.size(); ++i)
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_children[i]->debugDraw(screen, font);
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}
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#endif
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bool ThemeLayoutWidget::getWidgetData(const Common::String &name, int16 &x, int16 &y, uint16 &w, uint16 &h) {
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if (name == _name) {
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x = _x; y = _y;
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w = _w; h = _h;
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return true;
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}
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return false;
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}
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Graphics::TextAlign ThemeLayoutWidget::getWidgetTextHAlign(const Common::String &name) {
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if (name == _name) {
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return _textHAlign;
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}
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return Graphics::kTextAlignInvalid;
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}
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void ThemeLayoutWidget::reflowLayout(Widget *widgetChain) {
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Widget *guiWidget = getWidget(widgetChain);
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if (!guiWidget) {
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return;
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}
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int minWidth = -1;
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int minHeight = -1;
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guiWidget->getMinSize(minWidth, minHeight);
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if (_w != -1 && minWidth != -1 && minWidth > _w) {
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_w = minWidth;
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}
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if (_h != -1 && minHeight != -1 && minHeight > _h) {
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_h = minHeight;
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}
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}
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bool ThemeLayoutWidget::isBound(Widget *widgetChain) const {
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Widget *guiWidget = getWidget(widgetChain);
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return guiWidget != nullptr;
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}
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Widget *ThemeLayoutWidget::getWidget(Widget *widgetChain) const {
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const ThemeLayout *topLevelLayout = this;
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while (topLevelLayout->_parent) {
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topLevelLayout = topLevelLayout->_parent;
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}
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assert(topLevelLayout && topLevelLayout->getLayoutType() == kLayoutMain);
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const ThemeLayoutMain *dialogLayout = static_cast<const ThemeLayoutMain *>(topLevelLayout);
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Common::String widgetName = Common::String::format("%s.%s", dialogLayout->getName(), _name.c_str());
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return Widget::findWidgetInChain(widgetChain, widgetName.c_str());
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}
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void ThemeLayoutMain::reflowLayout(Widget *widgetChain) {
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assert(_children.size() <= 1);
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resetLayout();
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if (_overlays == "screen") {
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_x = 0;
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_y = 0;
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_w = g_system->getOverlayWidth();
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_h = g_system->getOverlayHeight();
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} else if (_overlays == "screen_center") {
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_x = -1;
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_y = -1;
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_w = -1;
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_h = -1;
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} else {
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if (!g_gui.xmlEval()->getWidgetData(_overlays, _x, _y, (uint16 &) _w, (uint16 &) _h)) {
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warning("Unable to retrieve overlayed dialog position %s", _overlays.c_str());
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}
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}
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if (_x >= 0) _x += _inset;
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if (_y >= 0) _y += _inset;
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if (_w >= 0) _w -= 2 * _inset;
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if (_h >= 0) _h -= 2 * _inset;
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if (_children.size()) {
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_children[0]->setWidth(_w);
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_children[0]->setHeight(_h);
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_children[0]->reflowLayout(widgetChain);
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if (_w == -1)
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_w = _children[0]->getWidth();
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if (_h == -1)
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_h = _children[0]->getHeight();
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if (_y == -1)
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_y = (g_system->getOverlayHeight() >> 1) - (_h >> 1);
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if (_x == -1)
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_x = (g_system->getOverlayWidth() >> 1) - (_w >> 1);
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}
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}
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void ThemeLayoutStacked::reflowLayoutVertical(Widget *widgetChain) {
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int curY;
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int resize[8];
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int rescount = 0;
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bool fixedWidth = _w != -1;
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curY = _padding.top;
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_h = _padding.top + _padding.bottom;
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for (uint i = 0; i < _children.size(); ++i) {
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if (!_children[i]->isBound(widgetChain)) continue;
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_children[i]->reflowLayout(widgetChain);
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if (_children[i]->getWidth() == -1)
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_children[i]->setWidth((_w == -1 ? getParentWidth() : _w) - _padding.left - _padding.right);
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if (_children[i]->getHeight() == -1) {
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assert(rescount < ARRAYSIZE(resize));
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resize[rescount++] = i;
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_children[i]->setHeight(0);
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}
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_children[i]->offsetY(curY);
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// Advance the vertical offset by the height of the newest item, plus
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// the item spacing value.
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curY += _children[i]->getHeight() + _spacing;
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// Update width and height of this stack layout
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if (!fixedWidth) {
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_w = MAX(_w, (int16)(_children[i]->getWidth() + _padding.left + _padding.right));
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}
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_h += _children[i]->getHeight() + _spacing;
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}
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// If there are any children at all, then we added the spacing value once
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// too often. Correct that.
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if (!_children.empty())
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_h -= _spacing;
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// If the width is not set at this point, then we have no bound widgets.
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if (!fixedWidth && _w == -1) {
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_w = 0;
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}
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for (uint i = 0; i < _children.size(); ++i) {
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switch (_itemAlign) {
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case kItemAlignStart:
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_children[i]->offsetX(_padding.left);
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break;
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case kItemAlignCenter:
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// Center child if it this has been requested *and* the space permits it.
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if (_children[i]->getWidth() < (_w - _padding.left - _padding.right)) {
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_children[i]->offsetX((_w >> 1) - (_children[i]->getWidth() >> 1));
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} else {
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_children[i]->offsetX(_padding.left);
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}
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break;
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case kItemAlignEnd:
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_children[i]->offsetX(_w - _children[i]->getWidth() - _padding.right);
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break;
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case kItemAlignStretch:
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_children[i]->offsetX(_padding.left);
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_children[i]->setWidth(_w - _padding.left - _padding.right);
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break;
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}
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}
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// If there were any items with undetermined height, then compute and set
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// their height now. We do so by determining how much space is left, and
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// then distributing this equally over all items which need auto-resizing.
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if (rescount) {
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int newh = (getParentHeight() - _h - _padding.bottom) / rescount;
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for (int i = 0; i < rescount; ++i) {
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// Set the height of the item.
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_children[resize[i]]->setHeight(newh);
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// Increase the height of this ThemeLayoutStacked accordingly, and
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// then shift all subsequence children.
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_h += newh;
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for (uint j = resize[i] + 1; j < _children.size(); ++j)
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_children[j]->offsetY(newh);
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}
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}
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}
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void ThemeLayoutStacked::reflowLayoutHorizontal(Widget *widgetChain) {
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int curX;
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int resize[8];
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int rescount = 0;
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bool fixedHeight = _h != -1;
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curX = _padding.left;
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_w = _padding.left + _padding.right;
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for (uint i = 0; i < _children.size(); ++i) {
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if (!_children[i]->isBound(widgetChain)) continue;
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_children[i]->reflowLayout(widgetChain);
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if (_children[i]->getHeight() == -1)
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_children[i]->setHeight((_h == -1 ? getParentHeight() : _h) - _padding.top - _padding.bottom);
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if (_children[i]->getWidth() == -1) {
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assert(rescount < ARRAYSIZE(resize));
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resize[rescount++] = i;
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_children[i]->setWidth(0);
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}
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_children[i]->offsetX(curX);
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// Advance the horizontal offset by the width of the newest item, plus
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// the item spacing value.
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curX += (_children[i]->getWidth() + _spacing);
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// Update width and height of this stack layout
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_w += _children[i]->getWidth() + _spacing;
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if (!fixedHeight) {
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_h = MAX(_h, (int16)(_children[i]->getHeight() + _padding.top + _padding.bottom));
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}
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}
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// If there are any children at all, then we added the spacing value once
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// too often. Correct that.
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if (!_children.empty())
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_w -= _spacing;
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// If the height is not set at this point, then we have no bound widgets.
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if (!fixedHeight && _h == -1) {
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_h = 0;
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}
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for (uint i = 0; i < _children.size(); ++i) {
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switch (_itemAlign) {
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case kItemAlignStart:
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_children[i]->offsetY(_padding.top);
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break;
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case kItemAlignCenter:
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// Center child if it this has been requested *and* the space permits it.
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if (_children[i]->getHeight() < (_h - _padding.top - _padding.bottom)) {
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_children[i]->offsetY((_h >> 1) - (_children[i]->getHeight() >> 1));
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} else {
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_children[i]->offsetY(_padding.top);
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}
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break;
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case kItemAlignEnd:
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_children[i]->offsetY(_h - _children[i]->getHeight() - _padding.bottom);
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break;
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case kItemAlignStretch:
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_children[i]->offsetY(_padding.top);
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_children[i]->setHeight(_w - _padding.top - _padding.bottom);
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break;
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}
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}
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// If there were any items with undetermined width, then compute and set
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// their width now. We do so by determining how much space is left, and
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// then distributing this equally over all items which need auto-resizing.
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if (rescount) {
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int neww = (getParentWidth() - _w - _padding.right) / rescount;
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for (int i = 0; i < rescount; ++i) {
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// Set the width of the item.
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_children[resize[i]]->setWidth(neww);
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// Increase the width of this ThemeLayoutStacked accordingly, and
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// then shift all subsequence children.
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_w += neww;
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for (uint j = resize[i] + 1; j < _children.size(); ++j)
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_children[j]->offsetX(neww);
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}
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}
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}
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} // End of namespace GUI
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