auto generate desktop file using qmake

Red_Panda_CPP.pro

@@ -13,6 +13,8 @@ linux: {
         PREFIX = /usr/local
     }
 
+    QMAKE_SUBSTITUTES += redpandaide.desktop.in
+
     resources.path = $${PREFIX}/share/$${APP_NAME}
     resources.files += linux/templates
     INSTALLS += resources
@@ -27,4 +29,8 @@ linux: {
     pixmaps.files += linux/redpandaide.png
     INSTALLS += pixmaps
 
+    desktop.path = $${PREFIX}/share/applications
+    desktop.files += redpandaide.desktop
+    INSTALLS += desktop
+
 }

redpandaide.desktop.in

@@ -1,7 +1,7 @@
 [Desktop Entry]
 Comment=A lightweighted QT-based C/C++ IDE
 Comment[zh_CN]=基于QT的轻量级C/C++集成开发环境
-Exec=/opt/RedPandaIDE/bin/RedPandaIDE %F
+Exec=RedPandaIDE %F
 GenericName=Red Panda C++
 GenericName[zh_CN]=小熊猫C++
 MimeType=application/pdf
@@ -11,5 +11,5 @@ StartupNotify=false
 Terminal=false
 Type=Application
 Categories=Development;Qt;
-Icon=/opt/RedPandaIDE/redpandaide.png
-Path=/opt/RedPandaIDE/bin
+Icon=$${PREFIX}/share/pixmaps/redpandaide.png
+Path=$${PREFIX}/bin