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//===========================================
// Lumina-desktop source code
// Copyright (c) 2017, Ken Moore
// Available under the 3-clause BSD license
// See the LICENSE file for full details
//===========================================
#include "glw-base.h"
#include "glw-widget.h"
#include <QPaintEngine>
#include <QDebug>
#include <QOpenGLContext>
#include <QOpenGLFunctions>
#include <QOpenGLPaintDevice>
GLW_Base::GLW_Base(QWidget *parent, Qt::WindowFlags f) : QOpenGLWidget(parent,f){
bg_color = QColor(Qt::black);
mouse_over_child = 0;
qDebug() << "Canvas supports threaded OpenGL:" << this->context()->supportsThreadedOpenGL();
qDebug() << " - globally:" << QOpenGLContext::globalShareContext()->supportsThreadedOpenGL();
}
GLW_Base::~GLW_Base(){
}
QWidget * GLW_Base::mouseOverWidget(){
return mouse_over_child;
}
// --- PUBLIC SLOTS ---
void GLW_Base::setBackgroundColor(QColor color){
bg_color = color;
this->update(); //repaint the entire widget (just in case you can see through the image)
}
void GLW_Base::setBackground(QRect geom, QImage img){
QPainter P(&bg_img);
P.drawImage(geom, img);
this->update(geom);
}
void GLW_Base::repaintArea(QRect rect){
this->update(rect);
}
void GLW_Base::setMouseOverWidget(QWidget *child){
mouse_over_child = child;
}
// --- PROTECTED ---
void GLW_Base::mouseMoveEvent(QMouseEvent *ev){
mouse_over_child = 0; //reset this flag - mouse is over the base right now
QWidget::mouseMoveEvent(ev);
}
void GLW_Base::resizeEvent(QResizeEvent *ev){
QOpenGLWidget::resizeEvent(ev);
if(!bg_img.isNull()){
bg_img = bg_img.scaled(ev->size(), Qt::IgnoreAspectRatio, Qt::SmoothTransformation);
}
emit BaseResized();
}
/*void GLW_Base::paintEvent(QPaintEvent *ev){
QOpenGLWidget::paintEvent(ev);
}*/
void GLW_Base::paintGL(){
//Setup the OpenGL stuff
QOpenGLFunctions *f = this->context()->functions();
f->glViewport(0, 0, width(), height());
f->glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
GLfloat vertices[] = {
0.0f, 0.707f,
-0.5f, -0.5f,
0.5f, -0.5f
};
f->glVertexAttribPointer(0, 2, GL_FLOAT, GL_FALSE, 0, vertices);
f->glEnableVertexAttribArray(0);
f->glDrawArrays(GL_TRIANGLES, 0, 3);
f->glDisableVertexAttribArray(0);
glDrawPixels(bg_img.width(), bg_img.height(), GL_RGBA, GL_UNSIGNED_BYTE, bg_img.bits());
QRect rect = QRect(QPoint(0,0), this->size());
//Prepare the image to be painted
QImage img(this->size(), QImage::Format_RGBA8888);
QPainter painter;
painter.begin(&img);
painter.fillRect(rect, bg_color);
painter.end();
//Now do any QPainter drawing
/*QOpenGLPaintDevice device(rect.size());
QStylePainter painter;
painter.begin(&device, this);
//qDebug() << "Paint Engine type:" << painter.paintEngine()->type();
painter.setClipRegion(rect);
//Fill in the background color first
painter.fillRect(rect, bg_color);
//Now paint any background image over that
painter.drawImage(rect, bg_img, rect, Qt::AutoColor | Qt::PreferDither | Qt::NoOpaqueDetection);
//Now find any children widgets and paint them if they are in that area
QObjectList child = this->children(); //Note: This is returned in stacking order (lowest -> highest)
for(int i=0; i<child.length(); i++){
if( !child[i]->isWidgetType() ){ continue; } //not a widget
GLW_Widget *glww = qobject_cast<GLW_Widget*>(child[i]);
if(glww!=0){
if(!rect.intersected(glww->widgetRect()).isNull()){
glww->paintYourself(&painter, &rect);
glww->paintChildren(&painter,&rect);
}
}
}
painter.end();
update();*/
}
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