From c5f45b7078d316953a9b1cd6e19b40a992b9c3ec Mon Sep 17 00:00:00 2001
From: peri4 <peri4ko@yandex.ru>
Date: Fri, 30 Apr 2021 14:13:16 +0300
Subject: [PATCH] graphic openglwidget create only when realy switch to opengl

---
 CMakeLists.txt           |  2 +-
 libs/graphic/graphic.cpp | 20 +++++++++++---------
 2 files changed, 12 insertions(+), 10 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 8f6125f..de68dad 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -4,7 +4,7 @@ cmake_policy(SET CMP0072 NEW) #  FindOpenGL prefers GLVND by default
 project(qad)
 set(qad_MAJOR    2)
 set(qad_MINOR    2)
-set(qad_REVISION 1)
+set(qad_REVISION 2)
 set(qad_SUFFIX   )
 set(qad_COMPANY  SHS)
 set(qad_DOMAIN   org.SHS)
diff --git a/libs/graphic/graphic.cpp b/libs/graphic/graphic.cpp
index 6b8581e..15fb527 100644
--- a/libs/graphic/graphic.cpp
+++ b/libs/graphic/graphic.cpp
@@ -105,12 +105,6 @@ Graphic::Graphic(QWidget * parent): QFrame(parent), canvas(0), line_x_min(this),
 	connect(&line_y_max, SIGNAL(valueChanged(double)), this, SLOT(lineYMaxChanged(double)));
 	connect(ui->canvas_raster, SIGNAL(paintEvent(QPaintEvent * )), this, SLOT(canvasPaintEvent()));
 	prepareCanvas(ui->canvas_raster);
-#ifdef HAS_GL
-	canvas_gl = new UGLWidget();
-	ui->layoutCanvas->addWidget(canvas_gl);
-	connect(canvas_gl, SIGNAL(paintSignal()), this, SLOT(canvasPaintEvent()));
-	prepareCanvas(canvas_gl);
-#endif
 	icon_exp_x  = QIcon(":/icons/expand_x.png");
 	icon_exp_y  = QIcon(":/icons/expand_y.png");
 	icon_exp_sx = QIcon(":/icons/expand_s_x.png");
@@ -870,11 +864,18 @@ void Graphic::setOpenGL(bool on) {
 #ifdef HAS_GL
 	isOGL = on;
 	if (on) {
+		if (!canvas_gl) {
+			canvas_gl = new UGLWidget();
+			ui->layoutCanvas->addWidget(canvas_gl);
+			connect(canvas_gl, SIGNAL(paintSignal()), this, SLOT(canvasPaintEvent()));
+			prepareCanvas(canvas_gl);
+		}
 		ui->canvas_raster->hide();
 		canvas_gl->show();
 		canvas = canvas_gl;
 	} else {
-		canvas_gl->hide();
+		if (canvas_gl)
+			canvas_gl->hide();
 		ui->canvas_raster->show();
 		canvas = ui->canvas_raster;
 	}
@@ -1460,7 +1461,8 @@ void Graphic::setCurrentAction(GraphicAction action) {
 void Graphic::setCanvasCursor(QCursor cursor) {
 	ui->canvas_raster->setCursor(cursor);
 #ifdef HAS_GL
-	canvas_gl->setCursor(cursor);
+	if (canvas_gl)
+		canvas_gl->setCursor(cursor);
 #endif
 }
 
@@ -1476,7 +1478,7 @@ void Graphic::setGuidesCursor() {
 void Graphic::swapToBuffer() {
 	QImage timg;
 #ifdef HAS_GL
-	if (isOGL) {
+	if (isOGL && canvas_gl) {
 		timg = canvas_gl->grabFrameBuffer();
 		QPainter p(buffer);
 		p.drawImage(0, 0, timg);