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comparison: layout/xul/tree/nsITreeBoxObject.idl

layout/xul/tree/nsITreeBoxObject.idl

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1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
2 /* This Source Code Form is subject to the terms of the Mozilla Public
3 * License, v. 2.0. If a copy of the MPL was not distributed with this
4 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
5
6 #include "nsISupports.idl"
7
8 interface nsIDOMElement;
9 interface nsITreeView;
10 interface nsITreeSelection;
11 interface nsITreeColumn;
12 interface nsITreeColumns;
13 interface nsIScriptableRegion;
14
15 [scriptable, uuid(64BA5199-C4F4-4498-BBDC-F8E4C369086C)]
16 interface nsITreeBoxObject : nsISupports
17 {
18 /**
19 * Obtain the columns.
20 */
21 readonly attribute nsITreeColumns columns;
22
23 /**
24 * The view that backs the tree and that supplies it with its data.
25 * It is dynamically settable, either using a view attribute on the
26 * tree tag or by setting this attribute to a new value.
27 */
28 attribute nsITreeView view;
29
30 /**
31 * Whether or not we are currently focused.
32 */
33 attribute boolean focused;
34
35 /**
36 * Obtain the treebody content node
37 */
38 readonly attribute nsIDOMElement treeBody;
39
40 /**
41 * Obtain the height of a row.
42 */
43 readonly attribute long rowHeight;
44
45 /**
46 * Obtain the width of a row.
47 */
48 readonly attribute long rowWidth;
49
50 /**
51 * Get the pixel position of the horizontal scrollbar.
52 */
53 readonly attribute long horizontalPosition;
54
55 /**
56 * Return the region for the visible parts of the selection, in device pixels.
57 */
58 readonly attribute nsIScriptableRegion selectionRegion;
59
60 /**
61 * Get the index of the first visible row.
62 */
63 long getFirstVisibleRow();
64
65 /**
66 * Get the index of the last visible row.
67 */
68 long getLastVisibleRow();
69
70 /**
71 * Gets the number of possible visible rows.
72 */
73 long getPageLength();
74
75 /**
76 * Ensures that a row at a given index is visible.
77 */
78 void ensureRowIsVisible(in long index);
79
80 /**
81 * Ensures that a given cell in the tree is visible.
82 */
83 void ensureCellIsVisible(in long row, in nsITreeColumn col);
84
85 /**
86 * Scrolls such that the row at index is at the top of the visible view.
87 */
88 void scrollToRow(in long index);
89
90 /**
91 * Scroll the tree up or down by numLines lines. Positive
92 * values move down in the tree. Prevents scrolling off the
93 * end of the tree.
94 */
95 void scrollByLines(in long numLines);
96
97 /**
98 * Scroll the tree up or down by numPages pages. A page
99 * is considered to be the amount displayed by the tree.
100 * Positive values move down in the tree. Prevents scrolling
101 * off the end of the tree.
102 */
103 void scrollByPages(in long numPages);
104
105 /**
106 * Scrolls such that a given cell is visible (if possible)
107 * at the top left corner of the visible view.
108 */
109 void scrollToCell(in long row, in nsITreeColumn col);
110
111 /**
112 * Scrolls horizontally so that the specified column is
113 * at the left of the view (if possible).
114 */
115 void scrollToColumn(in nsITreeColumn col);
116
117 /**
118 * Scroll to a specific horizontal pixel position.
119 */
120 void scrollToHorizontalPosition(in long horizontalPosition);
121
122 /**
123 * Invalidation methods for fine-grained painting control.
124 */
125 void invalidate();
126 void invalidateColumn(in nsITreeColumn col);
127 void invalidateRow(in long index);
128 void invalidateCell(in long row, in nsITreeColumn col);
129 void invalidateRange(in long startIndex, in long endIndex);
130 void invalidateColumnRange(in long startIndex, in long endIndex,
131 in nsITreeColumn col);
132
133 /**
134 * A hit test that can tell you what row the mouse is over.
135 * returns -1 for invalid mouse coordinates.
136 *
137 * The coordinate system is the client coordinate system for the
138 * document this boxObject lives in, and the units are CSS pixels.
139 */
140 long getRowAt(in long x, in long y);
141
142 /**
143 * A hit test that can tell you what cell the mouse is over. Row is the row index
144 * hit, returns -1 for invalid mouse coordinates. ColID is the column hit.
145 * ChildElt is the pseudoelement hit: this can have values of
146 * "cell", "twisty", "image", and "text".
147 *
148 * The coordinate system is the client coordinate system for the
149 * document this boxObject lives in, and the units are CSS pixels.
150 */
151 void getCellAt(in long x, in long y, out long row, out nsITreeColumn col, out ACString childElt);
152
153 /**
154 * Find the coordinates of an element within a specific cell.
155 */
156 void getCoordsForCellItem(in long row, in nsITreeColumn col, in ACString element,
157 out long x, out long y, out long width, out long height);
158
159 /**
160 * Determine if the text of a cell is being cropped or not.
161 */
162 boolean isCellCropped(in long row, in nsITreeColumn col);
163
164 /**
165 * The view is responsible for calling these notification methods when
166 * rows are added or removed. Index is the position at which the new
167 * rows were added or at which rows were removed. For
168 * non-contiguous additions/removals, this method should be called multiple times.
169 */
170 void rowCountChanged(in long index, in long count);
171
172 /**
173 * Notify the tree that the view is about to perform a batch
174 * update, that is, add, remove or invalidate several rows at once.
175 * This must be followed by calling endUpdateBatch(), otherwise the tree
176 * will get out of sync.
177 */
178 void beginUpdateBatch();
179
180 /**
181 * Notify the tree that the view has completed a batch update.
182 */
183 void endUpdateBatch();
184
185 /**
186 * Called on a theme switch to flush out the tree's style and image caches.
187 */
188 void clearStyleAndImageCaches();
189 };

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