13f533d490
New parameter 'content padding'. When specified, the scrollbar max value is calculated automatically. This aims to reduce manual calculation functions.
126 lines
3.9 KiB
C++
126 lines
3.9 KiB
C++
/*
|
|
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::draw()
|
|
{
|
|
if (isVisible()) {
|
|
for (auto child : Children)
|
|
if (child->isNotClipped() ||
|
|
AbsoluteClippingRect.isRectCollided(
|
|
child->getAbsolutePosition()))
|
|
child->draw();
|
|
}
|
|
}
|
|
|
|
void GUIScrollContainer::setScrollBar(GUIScrollBar *scrollbar)
|
|
{
|
|
m_scrollbar = scrollbar;
|
|
|
|
if (m_scrollbar && m_content_padding_px.has_value() && m_scrollfactor != 0.0f) {
|
|
// Set the scrollbar max value based on the content size.
|
|
|
|
// Get content size based on elements
|
|
core::rect<s32> size;
|
|
for (gui::IGUIElement *e : Children) {
|
|
core::rect<s32> abs_rect = e->getAbsolutePosition();
|
|
size.addInternalPoint(abs_rect.LowerRightCorner);
|
|
}
|
|
|
|
s32 visible_content_px = (
|
|
m_orientation == VERTICAL
|
|
? AbsoluteClippingRect.getHeight()
|
|
: AbsoluteClippingRect.getWidth()
|
|
);
|
|
|
|
s32 total_content_px = *m_content_padding_px + (
|
|
m_orientation == VERTICAL
|
|
? (size.LowerRightCorner.Y - AbsoluteClippingRect.UpperLeftCorner.Y)
|
|
: (size.LowerRightCorner.X - AbsoluteClippingRect.UpperLeftCorner.X)
|
|
);
|
|
|
|
s32 hidden_content_px = std::max<s32>(0, total_content_px - visible_content_px);
|
|
m_scrollbar->setMin(0);
|
|
m_scrollbar->setMax(std::ceil(hidden_content_px / std::fabs(m_scrollfactor)));
|
|
|
|
// Note: generally, the scrollbar has the same size as the scroll container.
|
|
// However, in case it isn't, proportional adjustments are needed.
|
|
s32 scrollbar_px = (
|
|
m_scrollbar->isHorizontal()
|
|
? m_scrollbar->getRelativePosition().getWidth()
|
|
: m_scrollbar->getRelativePosition().getHeight()
|
|
);
|
|
|
|
m_scrollbar->setPageSize((total_content_px * scrollbar_px) / visible_content_px);
|
|
}
|
|
|
|
updateScrolling();
|
|
}
|
|
|
|
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);
|
|
}
|