support opening of project source files when clicking on project tree item

src/app.d

@@ -35,6 +35,11 @@ extern (C) int UIAppMain(string[] args) {
 	// load theme from file "theme_default.xml"
 	Platform.instance.uiTheme = "theme_default";
 
+    // you can override default hinting mode here
+    FontManager.instance.hintingMode = HintingMode.Normal;
+    // you can override antialiasing setting here
+    FontManager.instance.minAnitialiasedFontSize = 0;
+
     // create window
     Window window = Platform.instance.createWindow("Dlang IDE", null);
 	

src/dlangide/ui/frame.d

@@ -4,6 +4,7 @@ import dlangui.widgets.menu;
 import dlangui.widgets.tabs;
 import dlangui.widgets.layouts;
 import dlangui.widgets.editors;
+import dlangui.widgets.srcedit;
 import dlangui.widgets.controls;
 import dlangui.widgets.appframe;
 import dlangui.widgets.docks;
@@ -14,32 +15,45 @@ import dlangui.dialogs.filedlg;
 import dlangide.ui.commands;
 import dlangide.ui.wspanel;
 import dlangide.workspace.workspace;
+import dlangide.workspace.project;
 
 import std.conv;
+import std.utf;
 
-class SourceEdit : EditBox {
+/// DIDE source file editor
+class DSourceEdit : SourceEdit {
 	this(string ID) {
 		super(ID);
 		styleId = null;
-		fontFamily = FontFamily.MonoSpace;
-		fontFace = "Consolas Bold,Consolas,Courier New";
-		fontSize = 20;
-		fontWeight = 800;
 		backgroundColor = 0xFFFFFF;
-		layoutWidth(FILL_PARENT).layoutHeight(FILL_PARENT);
-        minFontSize(12).maxFontSize(75); // allow font zoom with Ctrl + MouseWheel
-        //focusable = true;
 	}
 	this() {
 		this("SRCEDIT");
 	}
+    protected ProjectSourceFile _projectSourceFile;
+    @property ProjectSourceFile projectSourceFile() { return _projectSourceFile; }
+    /// load by filename
+    override bool load(string fn) {
+        return super.load(fn);
+    }
+    /// load by project item
+    bool load(ProjectSourceFile f) {
+        if (!load(f.filename)) {
+            _projectSourceFile = null;
+            return false;
+        }
+        _projectSourceFile = f;
+        return true;
+    }
 }
 
+/// DIDE app frame
 class IDEFrame : AppFrame {
 
     MenuItem mainMenuItems;
     WorkspacePanel _wsPanel;
     DockHost _dockHost;
+    TabWidget _tabs;
 
     this(Window window) {
         super();
@@ -50,6 +64,46 @@ class IDEFrame : AppFrame {
         super.init();
     }
 
+    /// source file selected in workspace tree
+    bool onSourceFileSelected(ProjectSourceFile file, bool activate) {
+        Log.d("onSourceFileSelected ", file.filename);
+        int index = _tabs.tabIndex(file.filename);
+        if (index >= 0) {
+            // file is already opened in tab
+            _tabs.selectTab(index, true);
+        } else {
+            // open new file
+            DSourceEdit editor = new DSourceEdit(file.filename);
+            if (editor.load(file)) {
+                _tabs.addTab(editor, toUTF32(file.name));
+                index = _tabs.tabIndex(file.filename);
+                TabItem tab = _tabs.tab(file.filename);
+                tab.objectParam = file;
+                _tabs.selectTab(index, true);
+            } else {
+                destroy(editor);
+                if (window)
+                    window.showMessageBox(UIString("File open error"d), UIString("Failed to open file "d ~ toUTF32(file.filename)));
+                return false;
+            }
+        }
+        if (activate)
+            _tabs.setFocus();
+        requestLayout();
+        return true;
+    }
+
+    void onTabChanged(string newActiveTabId, string previousTabId) {
+        int index = _tabs.tabIndex(newActiveTabId);
+        if (index >= 0) {
+            TabItem tab = _tabs.tab(index);
+            ProjectSourceFile file = cast(ProjectSourceFile)tab.objectParam;
+            if (file) {
+                // tab is source file editor
+                _wsPanel.selectItem(file);
+            }
+        }
+    }
 
     /// create app body widget
     override protected Widget createBody() {
@@ -59,35 +113,16 @@ class IDEFrame : AppFrame {
         // Create body - Tabs
 
         // editor tabs
-        TabWidget tabs = new TabWidget("TABS");
+        _tabs = new TabWidget("TABS");
-        tabs.setStyles("TAB_UP_DARK", "TAB_UP_BUTTON_DARK", "TAB_UP_BUTTON_DARK_TEXT");
+        _tabs.setStyles(STYLE_DOCK_HOST_BODY, STYLE_TAB_UP_DARK, STYLE_TAB_UP_BUTTON_DARK, STYLE_TAB_UP_BUTTON_DARK_TEXT);
-        tabs.styleId = STYLE_DOCK_HOST_BODY;
+        _tabs.onTabChangedListener = &onTabChanged;
         
-		// create Editors test tab
+        _dockHost.bodyWidget = _tabs;
-		//VerticalLayout editors = new VerticalLayout("editors");
-        //editors.layoutWidth = FILL_PARENT;
-        //editors.layoutHeight = FILL_PARENT;
-        EditBox editBox = new SourceEdit("editbox1");
-		editBox.text = "Some text\nSecond line\nYet another line\n\n\tforeach(s;lines);\n\t\twriteln(s);\n"d;
-		//editors.addChild(editBox);
-		//editBox.popupMenu = editPopupItem;
-        tabs.addTab(editBox, "Sample"d);
-
-        EditBox editBox2 = new SourceEdit("editbox2");
-		editBox2.text = "Second tab editor\n\nBlah Blah."d;
-		//editors.addChild(editBox);
-		//editBox.popupMenu = editPopupItem;
-        tabs.addTab(editBox2, "Sample text 2"d);
-
-        //tabs.addTab(editors, "Sample"d);
-		tabs.selectTab("editbox1");
-
-
-        _dockHost.bodyWidget = tabs;
 
         //=============================================================
         // Create workspace docked panel
         _wsPanel = new WorkspacePanel("workspace");
+        _wsPanel.sourceFileSelectionListener = &onSourceFileSelected;
         _dockHost.addDockedWindow(_wsPanel);
 
         return _dockHost;

src/dlangide/ui/wspanel.d

@@ -4,10 +4,25 @@ import dlangui.all;
 import dlangide.workspace.workspace;
 import dlangide.workspace.project;
 
+enum ProjectItemType : int {
+    None,
+    SourceFile,
+    SourceFolder,
+    Project,
+    Workspace
+}
+
+interface SourceFileSelectionHandler {
+    bool onSourceFileSelected(ProjectSourceFile file, bool activate);
+}
+
 class WorkspacePanel : DockWindow {
     protected Workspace _workspace;
     protected TreeWidget _tree;
 
+    /// handle source file selection change
+    Signal!SourceFileSelectionHandler sourceFileSelectionListener;
+
     this(string id) {
         super(id);
         workspace = null;
@@ -15,9 +30,33 @@ class WorkspacePanel : DockWindow {
         _caption.text = "Workspace Explorer"d;
     }
 
+    bool selectItem(ProjectItem projectItem) {
+        TreeItem item = _tree.findItemById(projectItem.filename);
+        if (item) {
+            _tree.selectItem(item);
+            return true;
+        }
+        return false;
+    }
+
+    void onTreeItemSelected(TreeItems source, TreeItem selectedItem, bool activated) {
+        if (selectedItem.intParam == ProjectItemType.SourceFile) {
+            // file selected
+            if (sourceFileSelectionListener.assigned) {
+                ProjectSourceFile sourceFile = cast(ProjectSourceFile)selectedItem.objectParam;
+                if (sourceFile) {
+                    sourceFileSelectionListener(sourceFile, activated);
+                }
+            }
+        } else if (selectedItem.intParam == ProjectItemType.SourceFolder) {
+            // folder selected
+        }
+    }
+
     override protected Widget createBodyWidget() {
         _tree = new TreeWidget("wstree");
         _tree.layoutHeight(FILL_PARENT).layoutHeight(FILL_PARENT);
+        _tree.selectionListener = &onTreeItemSelected;
         return _tree;
     }
 
@@ -30,10 +69,12 @@ class WorkspacePanel : DockWindow {
             ProjectItem child = items.child(i);
             if (child.isFolder) {
                 TreeItem p = root.newChild(child.filename, child.name, "folder");
+                p.intParam = ProjectItemType.SourceFolder;
                 p.objectParam = child;
                 addProjectItems(p, child);
             } else {
                 TreeItem p = root.newChild(child.filename, child.name, "text-plain");
+                p.intParam = ProjectItemType.SourceFile;
                 p.objectParam = child;
             }
         }
@@ -45,8 +86,10 @@ class WorkspacePanel : DockWindow {
         _tree.items.clear();
         if (w) {
             TreeItem root = _tree.items.newChild(w.filename, w.name, "project-development");
+            root.intParam = ProjectItemType.Workspace;
             foreach(project; w.projects) {
                 TreeItem p = root.newChild(project.filename, project.name, "project-open");
+                p.intParam = ProjectItemType.Project;
                 addProjectItems(p, project.items);
             }
         } else {