v0.2.74: Improve explorer with resize and smooth split pane

Author: djwisdom

imgui.ini

@@ -1,6 +1,6 @@
 [Window][Editor]
 Pos=0,0
-Size=941,820
+Size=988,801
 Collapsed=0
 
 [Window][DockSpace]

pcode-settings.json

@@ -1,17 +1,17 @@
 {
-  "window_w": 941,
-  "window_h": 820,
+  "window_w": 988,
+  "window_h": 801,
   "dark_theme": true,
   "show_status_bar": true,
   "word_wrap": true,
   "show_line_numbers": true,
-  "show_minimap": true,
+  "show_minimap": false,
   "show_spaces": true,
   "highlight_line": 0,
   "show_tabs": true,
   "tab_size": 4,
   "font_size": 17,
   "font_name": "CascadiaMono",
-  "last_open_dir": "C:\\Users\\casse\\github\\pcode-editor\\src",
-  "recent_files": ["C:\\Users\\casse\\github\\pcode-editor\\src\\editor_app.cpp", "C:\\Users\\casse\\github\\pcode-editor\\src\\editor_app.h", ".\\BUILD_SYSTEM.md", "C:\\Users\\casse\\github\\pcode-editor\\src\\main.cpp"]
+  "last_open_dir": "C:\\Users\\casse\\github\\pcode-editor",
+  "recent_files": ["C:\\Users\\casse\\github\\pcode-editor\\BUILD_SYSTEM.md", "C:\\Users\\casse\\github\\pcode-editor\\src\\main.cpp", "C:\\Users\\casse\\github\\pcode-editor\\src\\editor_app.cpp", "C:\\Users\\casse\\github\\pcode-editor\\src\\editor_app.h", ".\\BUILD_SYSTEM.md"]
 }

src/editor_app.cpp

@@ -175,7 +175,7 @@ std::string EditorApp::get_version() {
     } else {
         version = "BUG-merang!!!"; // fallback if VERSION file missing
     }
-    return "pCode Editor version " + version;
+    return "pCode Editor version 0.2.72 (8c21f94)" + version;
 }
 
 // ============================================================================
@@ -2576,47 +2576,51 @@ bool show_margins = settings_.show_bookmark_margin || settings_.show_change_hist
     }
 
 // ============================================================================
-// Sidebar - file explorer, git changes, and symbol outline
+// Explorer - file tree with split pane behavior
 // ============================================================================
 void EditorApp::render_sidebar() {
     if (!show_file_tree_) return;
 
-    static float sidebar_width = 200;
+    static float explorer_width = 250;
     static bool dragging = false;
 
-    // Sidebar with resize handle
-    ImGui::BeginChild("##Explorer", ImVec2(sidebar_width, -1), false, ImGuiWindowFlags_NoTitleBar);
+    // Explorer as a child window - fills full height
+    ImGui::BeginChild("##Explorer", ImVec2(explorer_width, -1), true, ImGuiWindowFlags_NoTitleBar);
 
-    if (ImGui::BeginTabBar("##SidebarTabs", ImGuiTabBarFlags_None)) {
-        if (ImGui::BeginTabItem("Files", nullptr, ImGuiTabItemFlags_None)) {
-            render_file_tree();
-            ImGui::EndTabItem();
-        }
-        if (show_git_changes_ && ImGui::BeginTabItem("Git", nullptr, ImGuiTabItemFlags_None)) {
-            render_git_changes();
-            ImGui::EndTabItem();
-        }
-        if (show_symbol_outline_ && ImGui::BeginTabItem("Symbols", nullptr, ImGuiTabItemFlags_None)) {
-            render_symbol_outline();
-            ImGui::EndTabItem();
-        }
-        ImGui::EndTabBar();
+    // Header with title and close button
+    ImGui::Text("Explorer");
+    ImGui::SameLine(ImGui::GetWindowWidth() - 30);
+    if (ImGui::Button("X")) {
+        show_file_tree_ = false;
     }
+    ImGui::Separator();
+    
+    // File tree
+    render_file_tree();
 
     ImGui::EndChild();
 
-    // Resizable splitter - drag to resize sidebar
-    float available_height = ImGui::GetContentRegionAvail().y;
-    ImGui::InvisibleButton("##Splitter", ImVec2(6, available_height > 0 ? available_height : 200));
+    // Draggable splitter between explorer and editor
+    float avail_h = ImGui::GetContentRegionAvail().y;
+    ImGui::SameLine();
+    ImGui::PushStyleVar(ImGuiStyleVar_FramePadding, ImVec2(0, avail_h / 2));
+    ImGui::InvisibleButton("##ExplorerSplitter", ImVec2(4, -1));
+    ImGui::PopStyleVar();
+    
     if (ImGui::IsItemHovered()) {
-        ImGui::SetMouseCursor(ImGuiMouseCursor_ResizeEW);
+        ImGui::SetMouseCursor(settings_.explorer_left ? ImGuiMouseCursor_ResizeEW : ImGuiMouseCursor_ResizeEW);
     }
     if (ImGui::IsItemClicked(0)) {
         dragging = true;
     }
     if (dragging && ImGui::IsMouseDown(0)) {
-        sidebar_width += ImGui::GetIO().MouseDelta.x;
-        sidebar_width = (sidebar_width < 100) ? 100 : (sidebar_width > 400) ? 400 : sidebar_width;
+        float delta = ImGui::GetIO().MouseDelta.x;
+        if (settings_.explorer_left) {
+            explorer_width += delta;
+        } else {
+            explorer_width -= delta;
+        }
+        explorer_width = std::clamp(explorer_width, 150.0f, 500.0f);
     } else {
         dragging = false;
     }