implement ShowInFileManager Platform method, implement popup menu support for grids, enable showInFileManager popup menu in FileDialog - for issue #151 - implemented in win32

src/dlangui/dialogs/filedlg.d

@@ -65,6 +65,13 @@ enum FileDialogFlag : uint {
 
 }
 
+/// File dialog action codes
+enum FileDialogActions : int {
+    ShowInFileManager = 4000,
+    CreateDirectory = 4001,
+    DeleteFile = 4002,
+}
+
 /// filetype filter entry for FileDialog
 struct FileFilterEntry {
     UIString label;
@@ -351,6 +358,10 @@ class FileDialog : Dialog, CustomGridCellAdapter {
             super.handleAction(action);
             return true;
         }
+        if (action.id == FileDialogActions.ShowInFileManager) {
+            Platform.instance.showInFileManager(action.stringParam);
+            return true;
+        }
         if (action.id == StandardAction.CreateDirectory) {
             // show editor popup
             window.showInputBox(UIString("CREATE_NEW_FOLDER"c), UIString("INPUT_NAME_FOR_FOLDER"c), ""d, delegate(dstring s) {
@@ -382,6 +393,31 @@ class FileDialog : Dialog, CustomGridCellAdapter {
         return openDirectory(path, null);
     }
 
+    protected MenuItem getCellPopupMenu(GridWidgetBase source, int col, int row) {
+        if (row >= 0 && row < _entries.length) {
+            MenuItem item = new MenuItem();
+            DirEntry e = _entries[row];
+            // show in explorer action
+            auto showAction = new Action(FileDialogActions.ShowInFileManager, "ACTION_FILE_SHOW_IN_FILE_MANAGER"c);
+            showAction.stringParam = e.name;
+            item.add(showAction);
+            // create directory action
+            if (_flags & FileDialogFlag.EnableCreateDirectory)
+                item.add(ACTION_CREATE_DIRECTORY);
+
+            if (e.isDir) {
+                //_edFilename.text = ""d;
+                //_filename = "";
+            } else if (e.isFile) {
+                //string fname = e.name;
+                //_edFilename.text = toUTF32(baseName(fname));
+                //_filename = fname;
+            }
+            return item;
+        }
+        return null;
+    }
+
     /// override to implement creation of dialog controls
     override void initialize() {
         _roots = getRootPaths;
@@ -446,6 +482,8 @@ class FileDialog : Dialog, CustomGridCellAdapter {
         _fileList.setColTitle(3, "Modified"d);
         _fileList.showRowHeaders = false;
         _fileList.rowSelect = true;
+        _fileList.cellPopupMenu = &getCellPopupMenu;
+        _fileList.menuItemAction = &handleAction;
 
         rightPanel.addChild(_edPath);
         rightPanel.addChild(_fileList);

src/dlangui/platforms/common/platform.d

@@ -1339,15 +1339,12 @@ class Platform {
         import std.process;
         browse(url);
         return true;
-        //Log.d("Platform.openURL(", url, ") is called");
-        //bool res = false;
-        //version(Windows) {
-        //    import win32.shellapi;
-        //    ShellExecuteA(null, "open", url.toStringz, null, null, 1);
-        //    res = true;
-        //}
-        //// TODO: support other platforms
-        //return res;
+    }
+
+    /// show directory or file in OS file manager (explorer, finder, etc...)
+    bool showInFileManager(string pathName) {
+        Log.w("showInFileManager is not implemented for current platform");
+        return false;
     }
 
     /// handle theme change: e.g. reload some themed resources

src/dlangui/platforms/windows/winapp.d

@@ -863,6 +863,39 @@ class Win32Platform : Platform {
         CloseClipboard();
     }
 
+    /// show directory or file in OS file manager (explorer, finder, etc...)
+    override bool showInFileManager(string pathName) {
+        Log.i("showInFileManager(", pathName, ")");
+        import dlangui.core.files;
+        //import std.process;
+        import std.path;
+        import std.string;
+
+        string explorerPath = findExecutablePath("explorer.exe");
+        if (!explorerPath.length) {
+            Log.e("showInFileManager failed - cannot find explorer.exe");
+            return false;
+        }
+        string normalized = buildNormalizedPath(pathName);
+        string arg = "/select,\"" ~ normalized ~ "\"";
+        STARTUPINFO si;
+        si.cb = si.sizeof;
+        PROCESS_INFORMATION pi;
+        Log.i("showInFileManager: ", explorerPath, " ", arg);
+        arg = "\"" ~ explorerPath ~ "\" " ~ arg;
+        auto res = CreateProcessW(null, //explorerPath.toUTF16z,
+                                  cast(wchar*)arg.toUTF16z,
+                                  null, null, false, DETACHED_PROCESS,
+                                  null, null, &si, &pi);
+        if (!res) {
+            Log.e("showInFileManager failed to run explorer.exe");
+            return false;
+        }
+
+        //auto pid = spawnProcess(explorerPath, [arg], );
+        return true;
+    }
+
 }
 
 extern(Windows)

src/dlangui/widgets/grid.d

@@ -55,9 +55,15 @@ module dlangui.widgets.grid;
 import dlangui.widgets.widget;
 import dlangui.widgets.controls;
 import dlangui.widgets.scroll;
+import dlangui.widgets.menu;
 import std.conv;
 import std.algorithm : equal;
 
+/// cellPopupMenu signal handler interface
+interface CellPopupMenuHandler {
+    MenuItem getCellPopupMenu(GridWidgetBase source, int col, int row);
+}
+
 /**
  * Data provider for GridWidget.
  */
@@ -238,7 +244,7 @@ interface ViewScrolledHandler {
 }
 
 /// Abstract grid widget
-class GridWidgetBase : ScrollWidgetBase, GridModelAdapter {
+class GridWidgetBase : ScrollWidgetBase, GridModelAdapter, MenuItemActionHandler {
     /// Callback to handle selection change
     Listener!CellSelectedHandler cellSelected;
 
@@ -696,6 +702,55 @@ class GridWidgetBase : ScrollWidgetBase, GridModelAdapter {
         return true;
     }
 
+    /// cell popup menu
+    Signal!CellPopupMenuHandler cellPopupMenu;
+    /// popup menu item action
+    Signal!MenuItemActionHandler menuItemAction;
+
+    protected MenuItem getCellPopupMenu(int col, int row) {
+        if (cellPopupMenu.assigned)
+            return cellPopupMenu(this, col, row);
+        return null;
+    }
+
+    /// handle popup menu action
+    protected bool onMenuItemAction(const Action action) {
+        if (menuItemAction.assigned)
+            return menuItemAction(action);
+        return false;
+    }
+
+    /// returns true if widget can show popup menu (e.g. by mouse right click at point x,y)
+    override bool canShowPopupMenu(int x, int y) {
+        int col, row;
+        Rect rc;
+        x -= _clientRect.left;
+        y -= _clientRect.top;
+        pointToCell(x, y, col, row, rc);
+        MenuItem item = getCellPopupMenu(col, row);
+        if (!item)
+            return false;
+        return true;
+    }
+
+    /// shows popup menu at (x,y)
+    override void showPopupMenu(int xx, int yy) {
+        int col, row;
+        Rect rc;
+        int x = xx - _clientRect.left;
+        int y = yy - _clientRect.top;
+        pointToCell(x, y, col, row, rc);
+        MenuItem menu = getCellPopupMenu(col - _headerCols, row - _headerRows);
+        if (menu) {
+            import dlangui.widgets.popup;
+            menu.updateActionState(this);
+            PopupMenu popupMenu = new PopupMenu(menu);
+            popupMenu.menuItemAction = this;
+            PopupWidget popup = window.showPopup(popupMenu, this, PopupAlign.Point | PopupAlign.Right, xx, yy);
+            popup.flags = PopupFlags.CloseOnClickOutside;
+        }
+    }
+
     /// handle mouse wheel events
     override bool onMouseEvent(MouseEvent event) {
         if (visibility != Visibility.Visible)

views/res/i18n/std_en.ini

@@ -24,3 +24,5 @@ CREATE_FOLDER_ERROR_MESSAGE=Folder creation is failed
 ACTION_EDITOR_TOGGLE_BOOKMARK=Toggle bookmark
 ACTION_EDITOR_GOTO_NEXT_BOOKMARK=Go to next bookmark
 ACTION_EDITOR_GOTO_PREVIOUS_BOOKMARK=Go to previous bookmark
+
+ACTION_FILE_SHOW_IN_FILE_MANAGER=Show in file manager