add a system status panel

gui/griffon-app/conf/Config.groovy

@@ -41,6 +41,11 @@ mvcGroups {
         view = 'com.muwire.gui.I2PStatusView'
         controller = 'com.muwire.gui.I2PStatusController'
     }
+    'system-status' {
+        model = 'com.muwire.gui.SystemStatusModel'
+        view = 'com.muwire.gui.SystemStatusView'
+        controller = 'com.muwire.gui.SystemStatusController'
+    }
     'trust-list' {
         model = 'com.muwire.gui.TrustListModel'
         view = 'com.muwire.gui.TrustListView'

gui/griffon-app/controllers/com/muwire/gui/SystemStatusController.groovy

@@ -0,0 +1,34 @@
+package com.muwire.gui
+
+import griffon.core.artifact.GriffonController
+import griffon.core.controller.ControllerAction
+import griffon.inject.MVCMember
+import griffon.metadata.ArtifactProviderFor
+import javax.annotation.Nonnull
+
+@ArtifactProviderFor(GriffonController)
+class SystemStatusController {
+    @MVCMember @Nonnull
+    SystemStatusModel model
+    @MVCMember @Nonnull
+    SystemStatusView view
+
+    @ControllerAction
+    void refresh() {
+        
+        long totalRam = Runtime.getRuntime().totalMemory()
+        long usedRam = totalRam - Runtime.getRuntime().freeMemory()
+        
+        model.usedRam = usedRam
+        model.totalRam = totalRam
+        model.maxRam = Runtime.getRuntime().maxMemory()
+        model.javaVendor = System.getProperty("java.vendor")
+        model.javaVersion = System.getProperty("java.version")
+    }
+    
+    @ControllerAction
+    void close() {
+        view.dialog.setVisible(false)
+        mvcGroup.destroy()
+    }
+}

gui/griffon-app/models/com/muwire/gui/SystemStatusModel.groovy

@@ -0,0 +1,24 @@
+package com.muwire.gui
+
+import javax.annotation.Nonnull
+
+import griffon.core.artifact.GriffonModel
+import griffon.inject.MVCMember
+import griffon.transform.Observable
+import griffon.metadata.ArtifactProviderFor
+
+@ArtifactProviderFor(GriffonModel)
+class SystemStatusModel {
+    @MVCMember @Nonnull
+    SystemStatusController controller
+    
+    @Observable String javaVendor
+    @Observable String javaVersion
+    @Observable long usedRam
+    @Observable long totalRam
+    @Observable long maxRam
+    
+    void mvcGroupInit(Map<String,String> args) {
+        controller.refresh()
+    }
+}

gui/griffon-app/views/com/muwire/gui/MainFrameView.groovy

@@ -100,6 +100,7 @@ class MainFrameView {
                         menuItem("MuWire", actionPerformed : {mvcGroup.createMVCGroup("mu-wire-status")})
                         MuWireSettings muSettings = application.context.get("muwire-settings")
                         menuItem("I2P", enabled : bind {model.routerPresent}, actionPerformed: {mvcGroup.createMVCGroup("i-2-p-status")})
+                        menuItem("System", actionPerformed : {mvcGroup.createMVCGroup("system-status")})
                     }
                 }
                 borderLayout()

gui/griffon-app/views/com/muwire/gui/SystemStatusView.groovy

@@ -0,0 +1,83 @@
+package com.muwire.gui
+
+import griffon.core.artifact.GriffonView
+import griffon.inject.MVCMember
+import griffon.metadata.ArtifactProviderFor
+import net.i2p.data.DataHelper
+
+import javax.swing.JDialog
+import javax.swing.JPanel
+import javax.swing.SwingConstants
+import javax.swing.border.TitledBorder
+
+import java.awt.BorderLayout
+import java.awt.GridBagConstraints
+import java.awt.event.WindowAdapter
+import java.awt.event.WindowEvent
+
+import javax.annotation.Nonnull
+
+@ArtifactProviderFor(GriffonView)
+class SystemStatusView {
+    @MVCMember @Nonnull
+    FactoryBuilderSupport builder
+    @MVCMember @Nonnull
+    SystemStatusModel model
+
+    def mainFrame
+    def dialog
+    def panel
+    def buttonsPanel
+    
+    void initUI() {
+        mainFrame = application.windowManager.findWindow("main-frame")
+        
+        dialog = new JDialog(mainFrame, "System Status", true)
+        
+        panel = builder.panel {
+            gridBagLayout()
+            panel(border : titledBorder(title : "Java", border : etchedBorder(), titlePosition : TitledBorder.TOP),
+            constraints : gbc(gridx : 0, gridy: 0, fill : GridBagConstraints.HORIZONTAL, weightx: 100)) {
+                gridBagLayout()
+                label(text : "Vendor   ", constraints : gbc(gridx:0, gridy:0, anchor : GridBagConstraints.LINE_START, weightx : 100))
+                label(text : bind {model.javaVendor}, constraints : gbc(gridx:1, gridy:0, anchor : GridBagConstraints.LINE_END))
+                label(text : "Version", constraints : gbc(gridx:0, gridy:1, anchor : GridBagConstraints.LINE_START, weightx : 100))
+                label(text : bind {model.javaVersion}, constraints : gbc(gridx:1, gridy:1, anchor : GridBagConstraints.LINE_END))
+            }
+            panel(border : titledBorder(title : "Memory", border : etchedBorder(), titlePosition : TitledBorder.TOP),
+            constraints : gbc(gridx : 0, gridy: 1, fill : GridBagConstraints.HORIZONTAL, weightx: 100)) {
+                gridBagLayout()
+                label(text : "Used", constraints : gbc(gridx:0, gridy:0, anchor : GridBagConstraints.LINE_START, weightx : 100))
+                label(text : bind {DataHelper.formatSize2Decimal(model.usedRam,false)+"B"}, constraints : gbc(gridx:1, gridy:0, anchor : GridBagConstraints.LINE_END))
+                label(text : "Total", constraints : gbc(gridx:0, gridy:1, anchor : GridBagConstraints.LINE_START, weightx : 100))
+                label(text : bind {DataHelper.formatSize2Decimal(model.totalRam,false)+"B"}, constraints : gbc(gridx:1, gridy:1, anchor : GridBagConstraints.LINE_END))
+                label(text : "Max", constraints : gbc(gridx:0, gridy:2, anchor : GridBagConstraints.LINE_START, weightx : 100))
+                label(text : bind {DataHelper.formatSize2Decimal(model.maxRam,false)+"B"}, constraints : gbc(gridx:1, gridy:2, anchor : GridBagConstraints.LINE_END))
+            }
+            buttonsPanel = builder.panel {
+                gridBagLayout()
+                button(text : "Refresh", constraints: gbc(gridx: 0, gridy: 0), refreshAction)
+                button(text : "Close", constraints : gbc(gridx : 1, gridy :0), closeAction)
+            }
+        }
+    }
+    
+    void mvcGroupInit(Map<String,String> args) {
+        JPanel statusPanel = new JPanel()
+        statusPanel.setLayout(new BorderLayout())
+        statusPanel.add(panel, BorderLayout.CENTER)
+        statusPanel.add(buttonsPanel, BorderLayout.SOUTH)
+
+        dialog.getContentPane().add(statusPanel)
+        dialog.pack()
+        dialog.setResizable(false)
+        dialog.setLocationRelativeTo(mainFrame)
+        dialog.setDefaultCloseOperation(JDialog.DISPOSE_ON_CLOSE)
+        dialog.addWindowListener(new WindowAdapter() {
+            public void windowClosed(WindowEvent e) {
+                mvcGroup.destroy()
+            }
+        })
+        dialog.show()
+    }
+}