change: sample structure

fix: tooltip of some readonly column in editing mode
feature: adapt filter panel's height

lib/ui/grid/column.js

@@ -36,6 +36,14 @@ export class GridColumn {
      * @see 更多例子参考 {@linkcode GridInputColumn} {@linkcode GridDateColumn} 中的代码实现
      */
 
+    /**
+     * 标记该类型是否可编辑
+     * @member
+     * @name GridColumn.canEdit
+     * @readonly
+     * @type {boolean}
+     */
+
     /**
      * 创建显示单元格时调用的方法
      * @param {GridColumnDefinition} col - 列定义对象
@@ -197,6 +205,7 @@ export class GridColumn {
  */
 export class GridInputColumn extends GridColumn {
     static get editing() { return true };
+    static get canEdit() { return true };
 
     /**
      * @ignore
@@ -311,6 +320,8 @@ const SymbolDropdown = Symbol.for('ui-dropdown');
  * @hideconstructor
  */
 export class GridDropdownColumn extends GridColumn {
+    static get canEdit() { return true };
+
     /**
      * @ignore
      * @param {Function} trigger 
@@ -512,6 +523,8 @@ export class GridDropdownColumn extends GridColumn {
  * @ignore
  */
 export class GridCheckboxColumn extends GridColumn {
+    static get canEdit() { return true };
+
     /**
      * @ignore
      * @param {Function} trigger 
@@ -654,6 +667,7 @@ export class GridIconColumn extends GridColumn {
  */
 export class GridDateColumn extends GridColumn {
     static get editing() { return true };
+    static get canEdit() { return true };
 
     /**
      * @ignore