I04_1-152: added code in icons docs

Author: IsabellaRey

docs/icons_tips.md

@@ -1,8 +1,115 @@
 Icons Tips
 ==========
 
-The icons used in the application are mostly standard system icons. They can be found under QtGui.QStyle, e.g. QtGui.QStyle.SP_MediaPlay.
+The icons used in the application are mostly standard system icons. They can be found under `QtGui.QStyle`, e.g. `QtGui.QStyle.SP_MediaPlay`.
 A list of icons is available [here](https://deptinfo-ensip.univ-poitiers.fr/ENS/pyside-docs/PySide/QtGui/QStyle.html?highlight=qstyle#PySide.QtGui.PySide.QtGui.QStyle.StandardPixmap).
 
 To view them quickly, you can run the following code (taken from [here](https://joekuan.wordpress.com/2015/09/23/list-of-qt-icons/)):
+```
+import sys
+from PyQt4.QtCore import *
+from PyQt4.QtGui import *
+# from PyQt4.QtWidgets import *
+
+
+class Widget(QWidget):
+    def __init__(self, parent=None):
+        super(Widget, self).__init__()
+
+        icons = [
+            'SP_ArrowBack',
+            'SP_ArrowDown',
+            'SP_ArrowForward',
+            'SP_ArrowLeft',
+            'SP_ArrowRight',
+            'SP_ArrowUp',
+            'SP_BrowserReload',
+            'SP_BrowserStop',
+            'SP_CommandLink',
+            'SP_ComputerIcon',
+            'SP_CustomBase',
+            'SP_DesktopIcon',
+            'SP_DialogApplyButton',
+            'SP_DialogCancelButton',
+            'SP_DialogCloseButton',
+            'SP_DialogDiscardButton',
+            'SP_DialogHelpButton',
+            'SP_DialogNoButton',
+            'SP_DialogOkButton',
+            'SP_DialogOpenButton',
+            'SP_DialogResetButton',
+            'SP_DialogSaveButton',
+            'SP_DialogYesButton',
+            'SP_DirClosedIcon',
+            'SP_DirHomeIcon',
+            'SP_DirIcon',
+            'SP_DirLinkIcon',
+            'SP_DirOpenIcon',
+            'SP_DockWidgetCloseButton',
+            'SP_DriveCDIcon',
+            'SP_DriveDVDIcon',
+            'SP_DriveFDIcon',
+            'SP_DriveHDIcon',
+            'SP_DriveNetIcon',
+            'SP_FileDialogBack',
+            'SP_FileDialogContentsView',
+            'SP_FileDialogDetailedView',
+            'SP_FileDialogEnd',
+            'SP_FileDialogInfoView',
+            'SP_FileDialogListView',
+            'SP_FileDialogNewFolder',
+            'SP_FileDialogStart',
+            'SP_FileDialogToParent',
+            'SP_FileIcon',
+            'SP_FileLinkIcon',
+            'SP_MediaPause',
+            'SP_MediaPlay',
+            'SP_MediaSeekBackward',
+            'SP_MediaSeekForward',
+            'SP_MediaSkipBackward',
+            'SP_MediaSkipForward',
+            'SP_MediaStop',
+            'SP_MediaVolume',
+            'SP_MediaVolumeMuted',
+            'SP_MessageBoxCritical',
+            'SP_MessageBoxInformation',
+            'SP_MessageBoxQuestion',
+            'SP_MessageBoxWarning',
+            'SP_TitleBarCloseButton',
+            'SP_TitleBarContextHelpButton',
+            'SP_TitleBarMaxButton',
+            'SP_TitleBarMenuButton',
+            'SP_TitleBarMinButton',
+            'SP_TitleBarNormalButton',
+            'SP_TitleBarShadeButton',
+            'SP_TitleBarUnshadeButton',
+            'SP_ToolBarHorizontalExtensionButton',
+            'SP_ToolBarVerticalExtensionButton',
+            'SP_TrashIcon',
+            'SP_VistaShield'
+        ]
+
+        colSize = 4
+
+        layout = QGridLayout()
+
+        count = 0
+        for i in icons:
+            btn = QPushButton(i)
+            btn.setIcon(self.style().standardIcon(getattr(QStyle, i)))
+
+            layout.addWidget(btn, count / colSize, count % colSize)
+            count += 1
+
+        self.setLayout(layout)
+
+
+if __name__ == '__main__':
+    app = QApplication(sys.argv)
+
+    dialog = Widget()
+    dialog.show()
+
+    app.exec_()
+```