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1
11 package org.eclipse.swt.dnd;
12
13 import org.eclipse.swt.*;
14 import org.eclipse.swt.graphics.*;
15 import org.eclipse.swt.internal.win32.*;
16 import org.eclipse.swt.widgets.*;
17
18 class TableDragAndDropEffect extends DragAndDropEffect {
19 Table table;
20 int scrollIndex;
21 long scrollBeginTime;
22 TableItem dropHighlight;
23
24 static final int SCROLL_HYSTERESIS = 200;
26 TableDragAndDropEffect(Table table) {
27 this.table = table;
28 }
29
30 int checkEffect(int effect) {
31 if ((effect & DND.FEEDBACK_SELECT) != 0) effect = effect & ~DND.FEEDBACK_INSERT_AFTER & ~DND.FEEDBACK_INSERT_BEFORE;
33 if ((effect & DND.FEEDBACK_INSERT_BEFORE) != 0) effect = effect & ~DND.FEEDBACK_INSERT_AFTER;
34 return effect;
35 }
36
37 Widget getItem(int x, int y) {
38 Point coordinates = new Point(x, y);
39 coordinates = table.toControl(coordinates);
40 TableItem item = table.getItem(coordinates);
41 if (item == null) {
42 Rectangle area = table.getClientArea();
43 if (area.contains(coordinates)) {
44 for (int x1 = area.x; x1 < area.x + area.width; x1++) {
46 Point pt = new Point(x1, coordinates.y);
47 item = table.getItem(pt);
48 if (item != null) {
49 break;
50 }
51 }
52 }
53 }
54 return item;
55 }
56
57 ImageData getDragSourceImage(int x, int y) {
58 TableItem[] selection = table.getSelection();
59 if (selection.length == 0) return null;
60 int tableImageList = OS.SendMessage (table.handle, OS.LVM_GETIMAGELIST, OS.LVSIL_SMALL, 0);
61 if (tableImageList != 0) {
62 int count = Math.min(selection.length, 10);
63 Rectangle bounds = selection[0].getBounds(0);
64 for (int i = 1; i < count; i++) {
65 bounds = bounds.union(selection[i].getBounds(0));
66 }
67 int hDC = OS.GetDC(0);
68 int hDC1 = OS.CreateCompatibleDC(hDC);
69 int bitmap = OS.CreateCompatibleBitmap(hDC, bounds.width, bounds.height);
70 int hOldBitmap = OS.SelectObject(hDC1, bitmap);
71 RECT rect = new RECT();
72 rect.right = bounds.width;
73 rect.bottom = bounds.height;
74 int hBrush = OS.GetStockObject(OS.WHITE_BRUSH);
75 OS.FillRect(hDC1, rect, hBrush);
76 for (int i = 0; i < count; i++) {
77 TableItem selected = selection[i];
78 Rectangle cell = selected.getBounds(0);
79 POINT pt = new POINT();
80 int imageList = OS.SendMessage (table.handle, OS.LVM_CREATEDRAGIMAGE, table.indexOf(selected), pt);
81 OS.ImageList_Draw(imageList, 0, hDC1, cell.x - bounds.x, cell.y - bounds.y, OS.ILD_SELECTED);
82 OS.ImageList_Destroy(imageList);
83 }
84 OS.SelectObject(hDC1, hOldBitmap);
85 OS.DeleteDC (hDC1);
86 OS.ReleaseDC (0, hDC);
87 Display display = table.getDisplay();
88 Image image = Image.win32_new(display, SWT.BITMAP, bitmap);
89 ImageData imageData = image.getImageData();
90 image.dispose();
91 return imageData;
92 }
93 return null;
94 }
95
96 void showDropTargetEffect(int effect, int x, int y) {
97 effect = checkEffect(effect);
98 int handle = table.handle;
99 Point coordinates = new Point(x, y);
100 coordinates = table.toControl(coordinates);
101 LVHITTESTINFO pinfo = new LVHITTESTINFO();
102 pinfo.x = coordinates.x;
103 pinfo.y = coordinates.y;
104 OS.SendMessage(handle, OS.LVM_HITTEST, 0, pinfo);
105 if ((effect & DND.FEEDBACK_SCROLL) == 0) {
106 scrollBeginTime = 0;
107 scrollIndex = -1;
108 } else {
109 if (pinfo.iItem != -1 && scrollIndex == pinfo.iItem && scrollBeginTime != 0) {
110 if (System.currentTimeMillis() >= scrollBeginTime) {
111 int top = Math.max (0, OS.SendMessage (handle, OS.LVM_GETTOPINDEX, 0, 0));
112 int count = OS.SendMessage (handle, OS.LVM_GETITEMCOUNT, 0, 0);
113 int index = (scrollIndex - 1 < top) ? Math.max(0, scrollIndex - 1) : Math.min(count - 1, scrollIndex + 1);
114 boolean scroll = true;
115 if (pinfo.iItem == top) {
116 scroll = pinfo.iItem != index;
117 } else {
118 RECT itemRect = new RECT ();
119 itemRect.left = OS.LVIR_BOUNDS;
120 if (OS.SendMessage (handle, OS.LVM_GETITEMRECT, pinfo.iItem, itemRect) != 0) {
121 RECT rect = new RECT ();
122 OS.GetClientRect (handle, rect);
123 POINT pt = new POINT ();
124 pt.x = itemRect.left;
125 pt.y = itemRect.top;
126 if (OS.PtInRect (rect, pt)) {
127 pt.y = itemRect.bottom;
128 if (OS.PtInRect (rect, pt)) scroll = false;
129 }
130 }
131 }
132 if (scroll) {
133 OS.SendMessage (handle, OS.LVM_ENSUREVISIBLE, index, 0);
134 table.redraw();
135 }
136 scrollBeginTime = 0;
137 scrollIndex = -1;
138 }
139 } else {
140 scrollBeginTime = System.currentTimeMillis() + SCROLL_HYSTERESIS;
141 scrollIndex = pinfo.iItem;
142 }
143 }
144
145 if (pinfo.iItem != -1 && (effect & DND.FEEDBACK_SELECT) != 0) {
146 TableItem item = table.getItem(pinfo.iItem);
147 if (dropHighlight != item) {
148 LVITEM lvItem = new LVITEM();
149 lvItem.stateMask = OS.LVIS_DROPHILITED;
150 OS.SendMessage(handle, OS.LVM_SETITEMSTATE, -1, lvItem);
151 lvItem.state = OS.LVIS_DROPHILITED;
152 OS.SendMessage(handle, OS.LVM_SETITEMSTATE, pinfo.iItem, lvItem);
153 dropHighlight = item;
154 }
155 } else {
156 if (dropHighlight != null) {
157 LVITEM lvItem = new LVITEM ();
158 lvItem.stateMask = OS.LVIS_DROPHILITED;
159 OS.SendMessage(handle, OS.LVM_SETITEMSTATE, -1, lvItem);
160 dropHighlight = null;
161 }
162 }
163
164 return;
178 }
179 }
180 |
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