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/*
This file is part of Warzone 2100.
Copyright (C) 2020 Warzone 2100 Project
Warzone 2100 is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
Warzone 2100 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with Warzone 2100; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
* @file
* Functions for clip rect.
*
* This widget will render only the childrens that are visible, and whose rectangle is contained in the clip rect's rectangle.
*/
#include "cliprect.h"
#include "lib/ivis_opengl/pieblitfunc.h"
void ClipRectWidget::runRecursive(W_CONTEXT *psContext)
{
W_CONTEXT newContext(psContext);
newContext.xOffset = psContext->xOffset + x();
newContext.yOffset = psContext->yOffset + y();
newContext.mx = psContext->mx - x();
newContext.my = psContext->my - y() + offset.y;
WIDGET::runRecursive(&newContext);
}
std::shared_ptr<WIDGET> ClipRectWidget::findMouseTargetRecursive(W_CONTEXT *psContext, WIDGET_KEY key, bool wasPressed)
{
W_CONTEXT newContext(psContext);
newContext.xOffset = psContext->xOffset - offset.x;
newContext.yOffset = psContext->yOffset - offset.y;
newContext.mx = psContext->mx + offset.x;
newContext.my = psContext->my + offset.y;
auto result = WIDGET::findMouseTargetRecursive(&newContext, key, wasPressed);
if (result != nullptr)
{
*psContext = newContext; // bubble-up the matching hit's context
}
return result;
}
void ClipRectWidget::displayRecursive(const WidgetGraphicsContext &context)
{
if (context.clipContains(geometry()))
{
display(context.getXOffset(), context.getYOffset());
}
auto childrenContext = context
.translatedBy(x() - offset.x, + y() - offset.y)
.clippedBy(WzRect(offset.x, offset.y, width(), height()));
for (auto child : children())
{
if (child->visible())
{
child->displayRecursive(childrenContext);
}
}
}
bool ClipRectWidget::isChildVisible(const std::shared_ptr<WIDGET>& child)
{
ASSERT_OR_RETURN(false, child->parent() == shared_from_this(), "Not a child of this widget?");
WidgetGraphicsContext childrenContext = WidgetGraphicsContext()
.translatedBy(screenPosX(), screenPosY())
.clippedBy(WzRect(offset.x, offset.y, width(), height()));
return childrenContext.clipContains(child->geometry());
}
bool ClipRectWidget::setTopOffset(uint16_t value)
{
if (value == offset.y)
{
return false;
}
offset.y = value;
return true;
}
uint16_t ClipRectWidget::getTopOffset()
{
return offset.y;
}
bool ClipRectWidget::setLeftOffset(uint16_t value)
{
if (value == offset.x)
{
return false;
}
offset.x = value;
return true;
}
int ClipRectWidget::parentRelativeXOffset(int coord) const
{
return x() - offset.x + coord;
}
int ClipRectWidget::parentRelativeYOffset(int coord) const
{
return y() - offset.y + coord;
}
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