chore : Add message box for advise use hpdi round factor is unsafe

Add a message box to advise user that use a hdpi round factor can cause
strange render according to :
1 - the selected value
2 - the dpi of the screen
3 - Edit the project on another computer and/or screen who don't have
the same parameters as point 1 and 2.

sources/ui/configpage/generalconfigurationpage.cpp

@@ -21,6 +21,7 @@
 #include "../../qeticons.h"
 #include "ui_generalconfigurationpage.h"
 #include "../../utils/qetsettings.h"
+#include "../../qetmessagebox.h"
 
 #include <QFileDialog>
 #include <QFontDialog>
@@ -560,3 +561,29 @@ void GeneralConfigurationPage::on_ElementEditor_Grid_PointSize_min_sb_valueChang
 {
 	ui->ElementEditor_Grid_PointSize_max_sb->setMinimum(std::max(1, value));
 }
+
+void GeneralConfigurationPage::on_m_hdpi_round_cb_clicked(bool checked)
+{
+	if (checked) {
+		if (QMessageBox::Cancel == QET::QetMessageBox::warning(
+				this,
+				tr("Fonctionnalité expérimental"),
+				tr("AVERTISSEMENT :\n"
+				   "Toutes valeurs autre que ‘Pas d’arrondi’ peut causer des erreurs de rendu "
+					"du projet en fonction de :\n\n"
+					"1 - la valeur sélectionnée \n"
+					"2 - du dpi de l'écran \n"
+					"3 - Modifier le projet sur un autre ordinateur et/ou écran n'ayant pas les mêmes paramètres des points 1 et 2."),
+				QMessageBox::StandardButton::Cancel|QMessageBox::StandardButton::Ok,
+				QMessageBox::StandardButton::Cancel
+														   )) {
+			ui->m_hdpi_round_cb->blockSignals(true);
+			ui->m_hdpi_round_cb->setChecked(false);
+			ui->m_hdpi_round_cb->blockSignals(false);
+			return;
+		}
+	}
+	ui->m_hdpi_round_label->setEnabled(checked);
+	ui->m_hdpi_round_policy_cb->setEnabled(checked);
+}
+

sources/ui/configpage/generalconfigurationpage.h

@@ -51,6 +51,8 @@ class GeneralConfigurationPage : public ConfigPage
 		void on_DiagramEditor_Grid_PointSize_min_sb_valueChanged(int value);
 		void on_ElementEditor_Grid_PointSize_min_sb_valueChanged(int value);
 
+		void on_m_hdpi_round_cb_clicked(bool checked);
+
 	private:
 		void fillLang();
 	

sources/ui/configpage/generalconfigurationpage.ui

@@ -6,7 +6,7 @@
    <rect>
     <x>0</x>
     <y>0</y>
-    <width>935</width>
+    <width>955</width>
     <height>556</height>
    </rect>
   </property>
@@ -17,7 +17,7 @@
    <item>
     <widget class="QTabWidget" name="tabWidget">
      <property name="currentIndex">
-      <number>1</number>
+      <number>0</number>
      </property>
      <widget class="QWidget" name="tab_3">
       <attribute name="title">
@@ -82,7 +82,7 @@
        </item>
        <item>
         <widget class="QWidget" name="m_hdpi_round_policy_widget" native="true">
-         <layout class="QHBoxLayout" name="horizontalLayout">
+         <layout class="QHBoxLayout" name="horizontalLayout" stretch="0,0,1">
           <property name="leftMargin">
            <number>0</number>
           </property>
@@ -96,14 +96,28 @@
            <number>0</number>
           </property>
           <item>
-           <widget class="QLabel" name="label_2">
+           <widget class="QCheckBox" name="m_hdpi_round_cb">
+            <property name="text">
+             <string/>
+            </property>
+           </widget>
+          </item>
+          <item>
+           <widget class="QLabel" name="m_hdpi_round_label">
+            <property name="enabled">
+             <bool>false</bool>
+            </property>
             <property name="text">
              <string>Méthode de mise à l'echelle des écrans à haute densité de pixels (hdpi) (appliqué au prochain lancement de QElectroTech) :</string>
             </property>
            </widget>
           </item>
           <item>
-           <widget class="QComboBox" name="m_hdpi_round_policy_cb"/>
+           <widget class="QComboBox" name="m_hdpi_round_policy_cb">
+            <property name="enabled">
+             <bool>false</bool>
+            </property>
+           </widget>
           </item>
          </layout>
         </widget>