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/*
* DISTRHO Plugin Framework (DPF)
* Copyright (C) 2012-2016 Filipe Coelho <falktx@falktx.com>
*
* Permission to use, copy, modify, and/or distribute this software for any purpose with
* or without fee is hereby granted, provided that the above copyright notice and this
* permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH REGARD
* TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN
* NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
* DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER
* IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
* CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#ifndef DGL_WIDGET_PRIVATE_DATA_HPP_INCLUDED
#define DGL_WIDGET_PRIVATE_DATA_HPP_INCLUDED
#include "../Widget.hpp"
#include "../Window.hpp"
#include <vector>
START_NAMESPACE_DGL
// -----------------------------------------------------------------------
struct Widget::PrivateData {
Widget* const self;
Window& parent;
Point<int> absolutePos;
Size<uint> size;
std::vector<Widget*> subWidgets;
uint id;
bool needsFullViewport;
bool needsScaling;
bool skipDisplay;
bool visible;
PrivateData(Widget* const s, Window& p, Widget* groupWidget, bool addToSubWidgets)
: self(s),
parent(p),
absolutePos(0, 0),
size(0, 0),
subWidgets(),
id(0),
needsFullViewport(false),
needsScaling(false),
skipDisplay(false),
visible(true)
{
if (addToSubWidgets && groupWidget != nullptr)
{
skipDisplay = true;
groupWidget->pData->subWidgets.push_back(self);
}
}
~PrivateData()
{
subWidgets.clear();
}
void display(const uint width, const uint height)
{
if (skipDisplay || size.isInvalid() || ! visible)
return;
bool needsDisableScissor = false;
// reset color
glColor4f(1.0f, 1.0f, 1.0f, 1.0f);
if (needsFullViewport || (absolutePos.isZero() && size == Size<uint>(width, height)))
{
// full viewport size
glViewport(0, 0, static_cast<GLsizei>(width), static_cast<GLsizei>(height));
}
else if (needsScaling)
{
// limit viewport to widget bounds
glViewport(absolutePos.getX(),
static_cast<int>(height - self->getHeight()) - absolutePos.getY(),
static_cast<GLsizei>(self->getWidth()),
static_cast<GLsizei>(self->getHeight()));
}
else
{
// only set viewport pos
glViewport(absolutePos.getX(),
/*static_cast<int>(height - self->getHeight())*/ - absolutePos.getY(),
static_cast<GLsizei>(width),
static_cast<GLsizei>(height));
// then cut the outer bounds
glScissor(absolutePos.getX(),
static_cast<int>(height - self->getHeight()) - absolutePos.getY(),
static_cast<GLsizei>(self->getWidth()),
static_cast<GLsizei>(self->getHeight()));
glEnable(GL_SCISSOR_TEST);
needsDisableScissor = true;
}
// display widget
self->onDisplay();
if (needsDisableScissor)
{
glDisable(GL_SCISSOR_TEST);
needsDisableScissor = false;
}
displaySubWidgets(width, height);
}
void displaySubWidgets(const uint width, const uint height)
{
for (std::vector<Widget*>::iterator it = subWidgets.begin(); it != subWidgets.end(); ++it)
{
Widget* const widget(*it);
DISTRHO_SAFE_ASSERT_CONTINUE(widget->pData != this);
widget->pData->display(width, height);
}
}
DISTRHO_DECLARE_NON_COPY_STRUCT(PrivateData)
};
// -----------------------------------------------------------------------
END_NAMESPACE_DGL
#endif // DGL_WIDGET_PRIVATE_DATA_HPP_INCLUDED
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