source: josm/trunk/src/org/openstreetmap/josm/gui/dialogs/DialogsPanel.java@ 7005

Last change on this file since 7005 was 7005, checked in by Don-vip, 12 years ago

see #8465 - use diamond operator where applicable
  • Property svn:eol-style set to native
File size: 11.3 KB
Line 
1// License: GPL. See LICENSE file for details.
2package org.openstreetmap.josm.gui.dialogs;
3
4import java.awt.Dimension;
5import java.util.ArrayList;
6import java.util.List;
7
8import javax.swing.BoxLayout;
9import javax.swing.JPanel;
10import javax.swing.JSplitPane;
11
12import org.openstreetmap.josm.gui.widgets.MultiSplitPane;
13import org.openstreetmap.josm.gui.widgets.MultiSplitLayout.Divider;
14import org.openstreetmap.josm.gui.widgets.MultiSplitLayout.Leaf;
15import org.openstreetmap.josm.gui.widgets.MultiSplitLayout.Node;
16import org.openstreetmap.josm.gui.widgets.MultiSplitLayout.Split;
17import org.openstreetmap.josm.tools.Destroyable;
18
19public class DialogsPanel extends JPanel implements Destroyable {
20 protected List<ToggleDialog> allDialogs = new ArrayList<>();
21 protected MultiSplitPane mSpltPane = new MultiSplitPane();
22 protected static final int DIVIDER_SIZE = 5;
23
24 /**
25 * Panels that are added to the multisplitpane.
26 */
27 private List<JPanel> panels = new ArrayList<>();
28
29 private final JSplitPane parent;
30 public DialogsPanel(JSplitPane parent) {
31 this.parent = parent;
32 }
33
34 public boolean initialized = false; // read only from outside
35
36 public void initialize(List<ToggleDialog> pAllDialogs) {
37 if (initialized)
38 throw new IllegalStateException();
39 initialized = true;
40 allDialogs = new ArrayList<>();
41
42 for (ToggleDialog dialog: pAllDialogs) {
43 add(dialog, false);
44 }
45
46 this.add(mSpltPane);
47 reconstruct(Action.ELEMENT_SHRINKS, null);
48 }
49
50 public void add(ToggleDialog dlg) {
51 add(dlg, true);
52 }
53
54 public void add(ToggleDialog dlg, boolean doReconstruct) {
55 allDialogs.add(dlg);
56 int i = allDialogs.size() - 1;
57 dlg.setDialogsPanel(this);
58 dlg.setVisible(false);
59 final JPanel p = new JPanel() {
60 /**
61 * Honoured by the MultiSplitPaneLayout when the
62 * entire Window is resized.
63 */
64 @Override
65 public Dimension getMinimumSize() {
66 return new Dimension(0, 40);
67 }
68 };
69 p.setLayout(new BoxLayout(p, BoxLayout.Y_AXIS));
70 p.setVisible(false);
71
72 mSpltPane.add(p, "L"+i);
73 panels.add(p);
74
75 if (dlg.isDialogShowing()) {
76 dlg.showDialog();
77 if (dlg.isDialogInCollapsedView()) {
78 dlg.isCollapsed = false; // pretend to be in Default view, this will be set back by collapse()
79 dlg.collapse();
80 }
81 if (doReconstruct) {
82 reconstruct(Action.INVISIBLE_TO_DEFAULT, dlg);
83 }
84 dlg.showNotify();
85 } else {
86 dlg.hideDialog();
87 }
88 }
89
90 /**
91 * What action was performed to trigger the reconstruction
92 */
93 public enum Action {
94 INVISIBLE_TO_DEFAULT,
95 COLLAPSED_TO_DEFAULT,
96 /* INVISIBLE_TO_COLLAPSED, does not happen */
97 ELEMENT_SHRINKS /* else. (Remaining elements have more space.) */
98 }
99 /**
100 * Reconstruct the view, if the configurations of dialogs has changed.
101 * @param action what happened, so the reconstruction is necessary
102 * @param triggeredBy the dialog that caused the reconstruction
103 */
104 public void reconstruct(Action action, ToggleDialog triggeredBy) {
105
106 final int N = allDialogs.size();
107
108 /**
109 * reset the panels
110 */
111 for (JPanel p: panels) {
112 p.removeAll();
113 p.setVisible(false);
114 }
115
116 /**
117 * Add the elements to their respective panel.
118 *
119 * Each panel contains one dialog in default view and zero or more
120 * collapsed dialogs on top of it. The last panel is an exception
121 * as it can have collapsed dialogs at the bottom as well.
122 * If there are no dialogs in default view, show the collapsed ones
123 * in the last panel anyway.
124 */
125 JPanel p = panels.get(N-1); // current Panel (start with last one)
126 int k = -1; // indicates that the current Panel index is N-1, but no default-view-Dialog has been added to this Panel yet.
127 for (int i=N-1; i >= 0 ; --i) {
128 final ToggleDialog dlg = allDialogs.get(i);
129 if (dlg.isDialogInDefaultView()) {
130 if (k == -1) {
131 k = N-1;
132 } else {
133 --k;
134 p = panels.get(k);
135 }
136 p.add(dlg, 0);
137 p.setVisible(true);
138 }
139 else if (dlg.isDialogInCollapsedView()) {
140 p.add(dlg, 0);
141 p.setVisible(true);
142 }
143 }
144
145 if (k == -1) {
146 k = N-1;
147 }
148 final int numPanels = N - k;
149
150 /**
151 * Determine the panel geometry
152 */
153 if (action == Action.ELEMENT_SHRINKS) {
154 for (int i=0; i<N; ++i) {
155 final ToggleDialog dlg = allDialogs.get(i);
156 if (dlg.isDialogInDefaultView()) {
157 final int ph = dlg.getPreferredHeight();
158 final int ah = dlg.getSize().height;
159 dlg.setPreferredSize(new Dimension(Integer.MAX_VALUE, (ah < 20 ? ph : ah)));
160 }
161 }
162 } else {
163 if (triggeredBy == null)
164 throw new IllegalArgumentException();
165
166 int sumP = 0; // sum of preferred heights of dialogs in default view (without the triggering dialog)
167 int sumA = 0; // sum of actual heights of dialogs in default view (without the triggering dialog)
168 int sumC = 0; // sum of heights of all collapsed dialogs (triggering dialog is never collapsed)
169
170 for (ToggleDialog dlg: allDialogs) {
171 if (dlg.isDialogInDefaultView()) {
172 if (dlg != triggeredBy) {
173 sumP += dlg.getPreferredHeight();
174 sumA += dlg.getHeight();
175 }
176 } else if (dlg.isDialogInCollapsedView()) {
177 sumC += dlg.getHeight();
178 }
179 }
180
181 /**
182 * If we add additional dialogs on startup (e.g. geoimage), they may
183 * not have an actual height yet.
184 * In this case we simply reset everything to it's preferred size.
185 */
186 if (sumA == 0) {
187 reconstruct(Action.ELEMENT_SHRINKS, null);
188 return;
189 }
190
191 /** total Height */
192 final int H = mSpltPane.getMultiSplitLayout().getModel().getBounds().getSize().height;
193
194 /** space, that is available for dialogs in default view (after the reconfiguration) */
195 final int s2 = H - (numPanels - 1) * DIVIDER_SIZE - sumC;
196
197 final int hp_trig = triggeredBy.getPreferredHeight();
198 if (hp_trig <= 0) throw new IllegalStateException(); // Must be positive
199
200 /** The new dialog gets a fair share */
201 final int hn_trig = hp_trig * s2 / (hp_trig + sumP);
202 triggeredBy.setPreferredSize(new Dimension(Integer.MAX_VALUE, hn_trig));
203
204 /** This is remainig for the other default view dialogs */
205 final int R = s2 - hn_trig;
206
207 /**
208 * Take space only from dialogs that are relatively large
209 */
210 int D_m = 0; // additional space needed by the small dialogs
211 int D_p = 0; // available space from the large dialogs
212 for (int i=0; i<N; ++i) {
213 final ToggleDialog dlg = allDialogs.get(i);
214 if (dlg.isDialogInDefaultView() && dlg != triggeredBy) {
215 final int ha = dlg.getSize().height; // current
216 final int h0 = ha * R / sumA; // proportional shrinking
217 final int he = dlg.getPreferredHeight() * s2 / (sumP + hp_trig); // fair share
218 if (h0 < he) { // dialog is relatively small
219 int hn = Math.min(ha, he); // shrink less, but do not grow
220 D_m += hn - h0;
221 } else { // dialog is relatively large
222 D_p += h0 - he;
223 }
224 }
225 }
226 /** adjust, without changing the sum */
227 for (int i=0; i<N; ++i) {
228 final ToggleDialog dlg = allDialogs.get(i);
229 if (dlg.isDialogInDefaultView() && dlg != triggeredBy) {
230 final int ha = dlg.getHeight();
231 final int h0 = ha * R / sumA;
232 final int he = dlg.getPreferredHeight() * s2 / (sumP + hp_trig);
233 if (h0 < he) {
234 int hn = Math.min(ha, he);
235 dlg.setPreferredSize(new Dimension(Integer.MAX_VALUE, hn));
236 } else {
237 int d;
238 try {
239 d = (h0-he) * D_m / D_p;
240 } catch (ArithmeticException e) { /* D_p may be zero - nothing wrong with that. */
241 d = 0;
242 }
243 dlg.setPreferredSize(new Dimension(Integer.MAX_VALUE, h0 - d));
244 }
245 }
246 }
247 }
248
249 /**
250 * create Layout
251 */
252 final List<Node> ch = new ArrayList<>();
253
254 for (int i = k; i <= N-1; ++i) {
255 if (i != k) {
256 ch.add(new Divider());
257 }
258 Leaf l = new Leaf("L"+i);
259 l.setWeight(1.0 / numPanels);
260 ch.add(l);
261 }
262
263 if (numPanels == 1) {
264 Node model = ch.get(0);
265 mSpltPane.getMultiSplitLayout().setModel(model);
266 } else {
267 Split model = new Split();
268 model.setRowLayout(false);
269 model.setChildren(ch);
270 mSpltPane.getMultiSplitLayout().setModel(model);
271 }
272
273 mSpltPane.getMultiSplitLayout().setDividerSize(DIVIDER_SIZE);
274 mSpltPane.getMultiSplitLayout().setFloatingDividers(true);
275 mSpltPane.revalidate();
276
277 /**
278 * Hide the Panel, if there is nothing to show
279 */
280 if (numPanels == 1 && panels.get(N-1).getComponents().length == 0)
281 {
282 parent.setDividerSize(0);
283 this.setVisible(false);
284 } else {
285 if (this.getWidth() != 0) { // only if josm started with hidden panel
286 this.setPreferredSize(new Dimension(this.getWidth(), 0));
287 }
288 this.setVisible(true);
289 parent.setDividerSize(5);
290 parent.resetToPreferredSizes();
291 }
292 }
293
294 @Override
295 public void destroy() {
296 for (ToggleDialog t : allDialogs) {
297 t.destroy();
298 }
299 }
300
301 /**
302 * Replies the instance of a toggle dialog of type <code>type</code> managed by this
303 * map frame
304 *
305 * @param <T>
306 * @param type the class of the toggle dialog, i.e. UserListDialog.class
307 * @return the instance of a toggle dialog of type <code>type</code> managed by this
308 * map frame; null, if no such dialog exists
309 *
310 */
311 public <T> T getToggleDialog(Class<T> type) {
312 for (ToggleDialog td : allDialogs) {
313 if (type.isInstance(td))
314 return type.cast(td);
315 }
316 return null;
317 }
318}
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