growth until hit maximum feature bloat, now decoupling into TweakDrag new plugin

.gitignore

@@ -0,0 +1,2 @@
+PLAN-*
+

Asset/css/shrink-vertically.css

@@ -48,3 +48,55 @@
 .sv-top-scroll-inner {
     height: 1px;
 }
+
+/*
+ * Make the top scrollbar thick enough to grab easily (touch / big fingers).
+ * WebKit/Blink (most desktop browsers and mobile Chrome/Safari) let us size the
+ * scrollbar; styling the thumb/track is needed for it to stay visible once customised.
+ * Thickness comes from the --sv-bar-size variable (Settings -> Shrink Vertically),
+ * injected in the page head; falls back to 25px. Chromium/WebKit only (Chrome/Edge/
+ * Safari, mobile Chrome/Safari); Firefox ignores ::-webkit-scrollbar and keeps its
+ * default thin bar -- accepted for now.
+ */
+.sv-top-scroll::-webkit-scrollbar {
+    height: var(--sv-bar-size, 25px);
+}
+
+.sv-top-scroll::-webkit-scrollbar-track {
+    background: rgba(0, 0, 0, 0.05);
+}
+
+.sv-top-scroll::-webkit-scrollbar-thumb {
+    background: rgba(0, 0, 0, 0.35);
+    border-radius: 6px;
+}
+
+/*
+ * Click-and-drag horizontal scrolling (added by Asset/js/drag-scroll.js when the
+ * "Drag the board background to scroll" setting is enabled). The .sv-drag-scroll class
+ * is set on #board-container by the script, so these rules are inert when disabled.
+ * A grab cursor advertises the empty background; cards keep the normal cursor since
+ * pressing them does a card drag, not a pan.
+ */
+#board-container.sv-drag-scroll {
+    cursor: grab;
+}
+
+#board-container.sv-drag-scroll .task-board {
+    cursor: default;
+}
+
+.sv-grabbing,
+.sv-grabbing * {
+    cursor: grabbing !important;
+    user-select: none !important;
+}
+
+/*
+ * Wider gutter between board columns is applied conditionally from
+ * Template/layout/variable.php (only when the "Widen the gap between columns" setting is
+ * on), using border-spacing with the --sv-bar-size value. border-spacing is the natural
+ * control for the gap between table columns: it spreads them without shrinking the cards
+ * and keeps each column header aligned with its task list. It is not in this static
+ * stylesheet so it can be toggled per the setting.
+ */

Asset/js/drag-scroll.js

@@ -0,0 +1,75 @@
+/*
+ * ShrinkVertically -- optional click-and-drag horizontal scrolling of the board.
+ *
+ * Like the Trello board canvas: press the empty board background and drag left/right
+ * to scroll #board-container horizontally. The pan only starts on empty background --
+ * pressing a task card, a drag handle, or any interactive control is ignored, so this
+ * never interferes with Kanboard's own card and column drag-and-drop.
+ *
+ * Loaded only when the "Drag the board background to scroll" setting is enabled.
+ */
+(function () {
+    "use strict";
+
+    // Pressing any of these (or their descendants) must NOT start a background pan.
+    var IGNORE = "a, button, input, textarea, select, label, " +
+        ".task-board, [data-task-id], .task-board-sort-handle, " +
+        ".draggable-row-handle, .dropdown, .ui-sortable-handle";
+
+    function isIgnored(el) {
+        return !!(el && el.closest && el.closest(IGNORE));
+    }
+
+    function init() {
+        var container = document.getElementById("board-container");
+
+        if (!container || container.getAttribute("data-sv-drag") === "1") {
+            return;
+        }
+
+        container.setAttribute("data-sv-drag", "1");
+        container.classList.add("sv-drag-scroll");
+
+        var dragging = false;
+        var startX = 0;
+        var startScrollLeft = 0;
+
+        container.addEventListener("mousedown", function (e) {
+            // Left button only, and only on empty board background.
+            if (e.button !== 0 || isIgnored(e.target)) {
+                return;
+            }
+
+            dragging = true;
+            startX = e.clientX;
+            startScrollLeft = container.scrollLeft;
+            container.classList.add("sv-grabbing");
+            e.preventDefault();
+        });
+
+        document.addEventListener("mousemove", function (e) {
+            if (!dragging) {
+                return;
+            }
+            container.scrollLeft = startScrollLeft - (e.clientX - startX);
+            e.preventDefault();
+        });
+
+        function stop() {
+            if (!dragging) {
+                return;
+            }
+            dragging = false;
+            container.classList.remove("sv-grabbing");
+        }
+
+        document.addEventListener("mouseup", stop);
+        document.addEventListener("mouseleave", stop);
+    }
+
+    if (document.readyState === "loading") {
+        document.addEventListener("DOMContentLoaded", init);
+    } else {
+        init();
+    }
+})();

Controller/ConfigController.php

@@ -14,15 +14,21 @@ class ConfigController extends BaseController
     const MIN_OFFSET = 0;
     const MAX_OFFSET = 2000;
 
+    const DEFAULT_BAR_SIZE = 25;
+    const MIN_BAR_SIZE = 0;
+    const MAX_BAR_SIZE = 200;
+
     public function show()
     {
         $offset = (int) $this->configModel->get('shrink_vertically_offset', self::DEFAULT_OFFSET);
-        $topScrollbar = (int) $this->configModel->get('shrink_vertically_top_scrollbar', 0);
+        $barSize = (int) $this->configModel->get('shrink_vertically_bar_size', self::DEFAULT_BAR_SIZE);
+        $topScrollbar = (int) $this->configModel->get('shrink_vertically_top_scrollbar', 1);
 
         $this->response->html($this->helper->layout->config('shrinkVertically:config/show', array(
             'title' => t('Settings').' > '.t('Shrink Vertically'),
             'values' => array(
                 'shrink_vertically_offset' => $offset,
+                'shrink_vertically_bar_size' => $barSize,
                 'shrink_vertically_top_scrollbar' => $topScrollbar,
             ),
             'errors' => array(),
@@ -36,10 +42,14 @@ class ConfigController extends BaseController
         $offset = isset($values['shrink_vertically_offset']) ? (int) $values['shrink_vertically_offset'] : self::DEFAULT_OFFSET;
         $offset = max(self::MIN_OFFSET, min(self::MAX_OFFSET, $offset));
 
+        $barSize = isset($values['shrink_vertically_bar_size']) ? (int) $values['shrink_vertically_bar_size'] : self::DEFAULT_BAR_SIZE;
+        $barSize = max(self::MIN_BAR_SIZE, min(self::MAX_BAR_SIZE, $barSize));
+
         $topScrollbar = isset($values['shrink_vertically_top_scrollbar']) ? 1 : 0;
 
         if ($this->configModel->save(array(
             'shrink_vertically_offset' => $offset,
+            'shrink_vertically_bar_size' => $barSize,
             'shrink_vertically_top_scrollbar' => $topScrollbar,
         ))) {
             $this->flash->success(t('Settings saved successfully.'));

Plugin.php

@@ -27,7 +27,7 @@ class Plugin extends Base
         $this->template->hook->attach('template:config:sidebar', 'shrinkVertically:config/sidebar');
 
         // Optional: a second, mirrored horizontal scrollbar above the board columns.
-        if ((int) $this->configModel->get('shrink_vertically_top_scrollbar', 0) === 1) {
+        if ((int) $this->configModel->get('shrink_vertically_top_scrollbar', 1) === 1) {
             $this->hook->on('template:layout:js', array(
                 'template' => 'plugins/ShrinkVertically/Asset/js/top-scrollbar.js',
             ));
@@ -51,7 +51,7 @@ class Plugin extends Base
 
     public function getPluginVersion()
     {
-        return '1.0.0';
+        return '1.3.0';
     }
 
     public function getPluginHomepage()

README.md

@@ -1,9 +1,10 @@
 # ShrinkVertically -- keep the board horizontal scrollbar visible
 
-A small Kanboard plugin focused on the board's horizontal scrollbar. It fixes the
-vertically-collapsed board view so the bottom scrollbar stays on screen, and can
-optionally add a second, mirrored horizontal scrollbar above the columns. Both are
-configurable under "Settings -> Shrink Vertically".
+A small Kanboard plugin focused on getting around the board horizontally. It fixes the
+vertically-collapsed board view so the bottom scrollbar stays on screen, can optionally
+add a second mirrored scrollbar above the columns, and can optionally let you drag the
+board background to scroll (like Trello). Everything is configurable under
+"Settings -> Shrink Vertically".
 
 ## The problem
 
@@ -71,16 +72,35 @@ a second, mirrored scrollbar just above the columns. A small script
 strip above `#board-container` and keeps its scroll position in sync with the board both
 ways.
 
+## Drag to scroll on Desktop (optional)
+
+Kanboard has no way to pan the board by grabbing it; you must use the scrollbar. Enable
+"Drag the board background to scroll" to click and drag on the empty board background to
+scroll the columns sideways, like the Trello board canvas. A small script
+(`Asset/js/drag-scroll.js`, loaded only when the option is on) starts a horizontal pan on
+`#board-container` only when the press lands on empty background -- pressing a task card,
+a drag handle or any control is ignored, so Kanboard's own card and column drag-and-drop
+keep working unchanged.
+
 ## Settings
 
-Go to "Settings -> Shrink Vertically":
+These settings are global (per Kanboard instance) and admin-only. Go to
+"Settings -> Shrink Vertically":
 
-- **Vertical offset in pixels** -- pixels reserved around the collapsed columns. Stored in
-  the Kanboard configuration and injected in the page head as the `--sv-shrink-offset` CSS
-  variable. Increase it if the scrollbar is still clipped (for example with a taller theme
-  header); decrease it to make the collapsed columns taller. Default: 240.
+- **Vertical offset in pixels** -- pixels reserved around the collapsed columns. Injected
+  in the page head as the `--sv-shrink-offset` CSS variable. Increase it if the scrollbar
+  is still clipped (for example with a taller theme header); decrease it to make the
+  collapsed columns taller. Default: 240.
+- **Scrollbar thickness and column gap in pixels** -- a single value that sets both the
+  thickness of the top scrollbar (Chromium/WebKit only) and the width of the column gap.
+  Injected as the `--sv-bar-size` CSS variable. Default: 25.
 - **Add a top horizontal scrollbar to the board** -- toggles the mirrored top scrollbar
-  described above.
+  described above. Default: on.
+- **Widen the gap between columns** -- toggles the wider gap between board columns (sized
+  by the value above). Also adds some spacing at the left and right edges of the board.
+  Default: on.
+- **Drag the board background to scroll horizontally** -- toggles the Trello-style
+  click-and-drag panning described above. Default: on.
 
 ## License
 

Template/config/show.php

@@ -13,6 +13,14 @@
         </p>
     </fieldset>
 
+    <fieldset>
+        <?= $this->form->label(t('Scrollbar thickness in pixels'), 'shrink_vertically_bar_size') ?>
+        <?= $this->form->number('shrink_vertically_bar_size', $values, $errors) ?>
+        <p class="form-help">
+            <?= t('Thickness of the top horizontal scrollbar (Chromium/WebKit browsers only). Default: 25.') ?>
+        </p>
+    </fieldset>
+
     <fieldset>
         <?= $this->form->checkbox('shrink_vertically_top_scrollbar', t('Add a top horizontal scrollbar to the board'), 1, isset($values['shrink_vertically_top_scrollbar']) && $values['shrink_vertically_top_scrollbar'] == 1) ?>
         <p class="form-help">

Template/layout/variable.php

@@ -1,3 +1,9 @@
 <style type="text/css">
-    :root { --sv-shrink-offset: <?= (int) $this->app->config('shrink_vertically_offset', 240) ?>px; }
+    :root {
+        --sv-shrink-offset: <?= (int) $this->app->config('shrink_vertically_offset', 240) ?>px;
+        --sv-bar-size: <?= (int) $this->app->config('shrink_vertically_bar_size', 25) ?>px;
+    }
+<?php if ((int) $this->app->config('shrink_vertically_column_gap', 1) === 1): ?>
+    #board { border-collapse: separate !important; border-spacing: var(--sv-bar-size, 25px) 0 !important; }
+<?php endif ?>
 </style>

VERSION

@@ -1 +1 @@
-ShrinkVertically v1.0
+ShrinkVertically v1.2