From 12399b0c519bcd47788f917a87ffef2ace09a5b7 Mon Sep 17 00:00:00 2001
From: peri4 <peri4ko@yandex.ru>
Date: Thu, 15 Jul 2021 16:00:01 +0300
Subject: [PATCH] no real OpenGL in Graphic in Qt Designer

---
 libs/graphic/graphic.cpp              | 10 +++++-----
 libs/graphic/graphic.h                |  5 ++++-
 libs/graphic/plugin/graphicplugin.cpp |  8 ++++++--
 libs/graphic/plugin/graphicplugin.h   |  2 +-
 4 files changed, 16 insertions(+), 9 deletions(-)

diff --git a/libs/graphic/graphic.cpp b/libs/graphic/graphic.cpp
index ad3c1c8..ff86110 100644
--- a/libs/graphic/graphic.cpp
+++ b/libs/graphic/graphic.cpp
@@ -61,7 +61,7 @@ Graphic::Graphic(QWidget * parent): QFrame(parent), canvas(0), line_x_min(this),
 	canvas_gl = 0;
 	gesture_angle = 45.;
 	leg_update = true;
-	visible_update = fullscr = need_mouse_pan = false;
+	visible_update = fullscr = need_mouse_pan = m_fakeGL = false;
 	gestures =
 #ifdef Q_OS_ANDROID
 				true;
@@ -334,7 +334,7 @@ void Graphic::canvasPaintEvent() {
 	}
 	QPainter p;
 #ifdef HAS_GL
-	if (isOGL) {
+	if (isOGL && !m_fakeGL) {
 		p.fillRect(canvas->rect(), Qt::black);
 		glClearColor(0.f, 0.f, 0.f, 0.f);
 		p.begin(canvas);
@@ -358,7 +358,7 @@ void Graphic::canvasPaintEvent() {
 		drawGrid();
 	p.setRenderHint(QPainter::Antialiasing, aalias);
 #ifdef HAS_GL
-	if (isOGL) {
+	if (isOGL && !m_fakeGL) {
 		if (aalias) glEnable(GL_MULTISAMPLE);
 		else glDisable(GL_MULTISAMPLE);
 	}
@@ -370,7 +370,7 @@ void Graphic::canvasPaintEvent() {
 	if (pause_) drawPause();
 	emit graphicPaintEvent(painter);
 	p.end();
-	if (isOGL) return;
+	if (isOGL && !m_fakeGL) return;
 	p.begin(canvas);
 	p.drawImage(0, 0, *buffer);
 	p.end();
@@ -863,7 +863,7 @@ void Graphic::exportGraphics(QString filename) {
 void Graphic::setOpenGL(bool on) {
 #ifdef HAS_GL
 	isOGL = on;
-	if (on) {
+	if (on && !m_fakeGL) {
 		if (!canvas_gl) {
 			canvas_gl = new UGLWidget();
 			ui->layoutCanvas->addWidget(canvas_gl);
diff --git a/libs/graphic/graphic.h b/libs/graphic/graphic.h
index de6f86f..e6d28ea 100644
--- a/libs/graphic/graphic.h
+++ b/libs/graphic/graphic.h
@@ -44,6 +44,7 @@ namespace Ui {
 
 
 class UGLWidget;
+class GraphicPlugin;
 
 
 Q_DECLARE_METATYPE(QVector<QPointF>)
@@ -119,6 +120,8 @@ class QAD_GRAPHIC_EXPORT Graphic: public QFrame
 	Q_PROPERTY(Graphic::GraphicsData graphicsData READ graphicsData WRITE setGraphicsData)
 	Q_PROPERTY(QByteArray graphicsDataRaw READ graphicsDataRaw WRITE setGraphicsDataRaw)
 
+	friend class GraphicPlugin;
+
 public:
 	Graphic(QWidget * parent = 0);
 	virtual ~Graphic();
@@ -406,7 +409,7 @@ protected:
 	double gridx, gridy, history, visible_time, inc_x, grid_numbers_x, grid_numbers_y, LN10;
 	double eminx, eminy, emaxx, emaxy, pause_phase, gesture_angle;
 	int lastw, lasth, min_repaint_int, timer_pause, thick;
-	bool aalias, aupdate, grid, guides, isFit, isOGL, isHover, bufferActive, cancel, pause_, gestures, m_LODOptimization;
+	bool aalias, aupdate, grid, guides, isFit, isOGL, isHover, bufferActive, cancel, pause_, gestures, m_LODOptimization, m_fakeGL;
 	bool hasLblX, hasLblY, navigation, only_expand_y, only_expand_x, is_lines_update, leg_update, visible_update, fullscr, need_mouse_pan;
 
 protected slots:
diff --git a/libs/graphic/plugin/graphicplugin.cpp b/libs/graphic/plugin/graphicplugin.cpp
index c4ff495..4a0afc2 100644
--- a/libs/graphic/plugin/graphicplugin.cpp
+++ b/libs/graphic/plugin/graphicplugin.cpp
@@ -4,11 +4,12 @@
 
 
 GraphicPlugin::GraphicPlugin(QObject * parent): QObject(parent) {
-	m_initialized = false;
+	m_initialized = m_designer = false;
 }
 
 
 void GraphicPlugin::initialize(QDesignerFormEditorInterface * /* core */) {
+	m_designer = true;
 	if (m_initialized)
 		return;
 
@@ -24,7 +25,10 @@ bool GraphicPlugin::isInitialized() const {
 
 
 QWidget * GraphicPlugin::createWidget(QWidget * parent) {
-	return new Graphic(parent);
+	auto ret = new Graphic(parent);
+	if (m_designer)
+		ret->m_fakeGL = true;
+	return ret;
 }
 
 
diff --git a/libs/graphic/plugin/graphicplugin.h b/libs/graphic/plugin/graphicplugin.h
index 4112d65..58af1a4 100644
--- a/libs/graphic/plugin/graphicplugin.h
+++ b/libs/graphic/plugin/graphicplugin.h
@@ -29,7 +29,7 @@ public:
 	void initialize(QDesignerFormEditorInterface * core);
 
 private:
-	bool m_initialized;
+	bool m_initialized, m_designer;
 
 };