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Add scroll_container formspec element (redo) (#9101)

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New formspec elements:

 - `scroll_container[<X>,<Y>;<W>,<H>;<scrollbar name>;<orientation>;<scroll factor>]`
 - `scroll_container_end[]`

Other elements can be embedded in this element. Scrollbar must be placed manually.
This commit is contained in:
DS 2020-04-13 10:50:07 +02:00 • committed by GitHub
parent 6cf15cf872
commit 0ac999ded7
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11 changed files with 411 additions and 50 deletions
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70
src/gui/guiScrollContainer.cpp Normal file
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/*
Minetest
Copyright (C) 2020 DS
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 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 Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "guiScrollContainer.h"
GUIScrollContainer::GUIScrollContainer(gui::IGUIEnvironment *env,
gui::IGUIElement *parent, s32 id, const core::rect<s32> &rectangle,
const std::string &orientation, f32 scrollfactor) :
gui::IGUIElement(gui::EGUIET_ELEMENT, env, parent, id, rectangle),
m_scrollbar(nullptr), m_scrollfactor(scrollfactor)
{
if (orientation == "vertical")
m_orientation = VERTICAL;
else if (orientation == "horizontal")
m_orientation = HORIZONTAL;
else
m_orientation = UNDEFINED;
}
bool GUIScrollContainer::OnEvent(const SEvent &event)
{
if (event.EventType == EET_MOUSE_INPUT_EVENT &&
event.MouseInput.Event == EMIE_MOUSE_WHEEL &&
!event.MouseInput.isLeftPressed() && m_scrollbar) {
Environment->setFocus(m_scrollbar);
bool retval = m_scrollbar->OnEvent(event);
// a hacky fix for updating the hovering and co.
IGUIElement *hovered_elem = getElementFromPoint(core::position2d<s32>(
event.MouseInput.X, event.MouseInput.Y));
SEvent mov_event = event;
mov_event.MouseInput.Event = EMIE_MOUSE_MOVED;
Environment->postEventFromUser(mov_event);
if (hovered_elem)
hovered_elem->OnEvent(mov_event);
return retval;
}
return IGUIElement::OnEvent(event);
}
void GUIScrollContainer::updateScrolling()
{
s32 pos = m_scrollbar->getPos();
core::rect<s32> rect = getRelativePosition();
if (m_orientation == VERTICAL)
rect.UpperLeftCorner.Y = pos * m_scrollfactor;
else if (m_orientation == HORIZONTAL)
rect.UpperLeftCorner.X = pos * m_scrollfactor;
setRelativePosition(rect);
}