show tooltips on some download states

gui/griffon-app/i18n/messages.properties

@@ -808,6 +808,10 @@ TOOLTIP_DOWNLOAD_PAUSE=Pause the selected downloads
 TOOLTIP_DOWNLOAD_CANCEL=Cancel the selected downloads
 TOOLTIP_DOWNLOAD_PREVIEW=Preview the selected downloads
 TOOLTIP_DOWNLOAD_CLEAR_DONE=Remove finished and failed downloads from list
+TOOLTIP_DOWNLOAD_STATE_HASHLIST=Fetching hash list, download will start shortly
+TOOLTIP_DOWNLOAD_STATE_FAILED=Download failed, MuWire will retry
+TOOLTIP_DOWNLOAD_STATE_REJECTED=Slot limit on the uploader reached, MuWIre will retry
+TOOLTIP_DOWNLOAD_STATE_HOPELESS=Download cannot complete, MuWire will not retry
 
 ### Tooltips for the Library tab
 TOOLTIP_LIBRARY_TREE=View your shared files as a tree

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

@@ -285,7 +285,7 @@ class MainFrameView {
                                     downloadsTable = table(id : "downloads-table", autoCreateRowSorter : true, rowHeight : rowHeight) {
                                         tableModel(list: model.downloads) {
                                             closureColumn(header: trans("NAME"), preferredWidth: 300, type: String, read : {row -> HTMLSanitizer.sanitize(row.downloader.file.getName())})
-                                            closureColumn(header: trans("STATUS"), preferredWidth: 50, type: String, read : {row -> trans(row.downloader.getCurrentState().name())})
+                                            closureColumn(header: trans("STATUS"), preferredWidth: 50, type: Downloader.DownloadState, read : { row -> row.downloader.getCurrentState()})
                                             closureColumn(header: trans("PROGRESS"), preferredWidth: 70, type: Downloader, read: { row -> row.downloader })
                                             closureColumn(header: trans("SPEED"), preferredWidth: 50, type:String, read :{row ->
                                                 formatSize(row.downloader.speed(),"B_SEC")
@@ -1003,6 +1003,7 @@ class MainFrameView {
         centerRenderer.setHorizontalAlignment(JLabel.CENTER)
         downloadsTable.setDefaultRenderer(Integer.class, centerRenderer)
         downloadsTable.setDefaultRenderer(Downloader.class, new DownloadProgressRenderer())
+        downloadsTable.setDefaultRenderer(Downloader.DownloadState.class, new DownloadStateRenderer())
 
         downloadsTable.rowSorter.addRowSorterListener({ evt -> lastDownloadSortEvent = evt })
         downloadsTable.rowSorter.setSortsOnUpdates(true)

gui/src/main/groovy/com/muwire/gui/DownloadStateRenderer.groovy

@@ -0,0 +1,43 @@
+package com.muwire.gui
+
+import com.muwire.core.download.Downloader
+
+import javax.swing.JComponent
+import javax.swing.JTable
+import javax.swing.table.DefaultTableCellRenderer
+
+import static com.muwire.gui.Translator.trans
+
+class DownloadStateRenderer extends DefaultTableCellRenderer {
+    @Override
+    JComponent getTableCellRendererComponent(JTable table, Object value,
+                                             boolean isSelected, boolean hasFocus, int row, int column) {
+        super.getTableCellRendererComponent(table, value, isSelected, hasFocus, row, column)
+        if (value == null)
+            return this //TODO investigate
+
+        Downloader.DownloadState state = (Downloader.DownloadState) value
+        setText(trans(state.name()))
+        
+        String tooltipKey = null
+        switch(state) {
+            case Downloader.DownloadState.HASHLIST : tooltipKey = "TOOLTIP_DOWNLOAD_STATE_HASHLIST"; break
+            case Downloader.DownloadState.FAILED : tooltipKey = "TOOLTIP_DOWNLOAD_STATE_FAILED"; break
+            case Downloader.DownloadState.REJECTED : tooltipKey = "TOOLTIP_DOWNLOAD_STATE_REJECTED"; break
+            case Downloader.DownloadState.HOPELESS : tooltipKey = "TOOLTIP_DOWNLOAD_STATE_HOPELESS"; break
+        }
+        
+        if (tooltipKey != null)
+            setToolTipText(trans(tooltipKey))
+
+        if (isSelected) {
+            setForeground(table.getSelectionForeground())
+            setBackground(table.getSelectionBackground())
+        } else {
+            setForeground(table.getForeground())
+            setBackground(table.getBackground())
+        }
+        
+        this
+    }
+}