Unity 8
IndicatorsMenu.qml
1 /*
2  * Copyright (C) 2014 Canonical, Ltd.
3  *
4  * This program is free software; you can redistribute it and/or modify
5  * it under the terms of the GNU General Public License as published by
6  * the Free Software Foundation; version 3.
7  *
8  * This program is distributed in the hope that it will be useful,
9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11  * GNU General Public License for more details.
12  *
13  * You should have received a copy of the GNU General Public License
14  * along with this program. If not, see <http://www.gnu.org/licenses/>.
15  */
16 
17 import QtQuick 2.2
18 import Ubuntu.Components 1.1
19 import Ubuntu.Gestures 0.1
20 import "../Components"
21 import "Indicators"
22 
23 Showable {
24  id: root
25  property alias indicatorsModel: bar.indicatorsModel
26  property alias showDragHandle: __showDragHandle
27  property alias hideDragHandle: __hideDragHandle
28  property alias overFlowWidth: bar.overFlowWidth
29  property alias verticalVelocityThreshold: yVelocityCalculator.velocityThreshold
30  property int minimizedPanelHeight: units.gu(3)
31  property int expandedPanelHeight: units.gu(7)
32  property real openedHeight: units.gu(71)
33  readonly property real unitProgress: Math.max(0, (height - minimizedPanelHeight) / (openedHeight - minimizedPanelHeight))
34  readonly property bool fullyOpened: unitProgress >= 1
35  readonly property bool partiallyOpened: unitProgress > 0 && unitProgress < 1.0
36  readonly property bool fullyClosed: unitProgress == 0
37  property bool enableHint: true
38  property bool contentEnabled: true
39  property color panelColor: "black"
40 
41  signal showTapped(point position)
42 
43  // TODO: Perhaps we need a animation standard for showing/hiding? Each showable seems to
44  // use its own values. Need to ask design about this.
45  showAnimation: StandardAnimation {
46  property: "height"
47  to: openedHeight
48  duration: UbuntuAnimation.BriskDuration
49  easing.type: Easing.OutCubic
50  }
51 
52  hideAnimation: StandardAnimation {
53  property: "height"
54  to: minimizedPanelHeight
55  duration: UbuntuAnimation.BriskDuration
56  easing.type: Easing.OutCubic
57  }
58 
59  height: minimizedPanelHeight
60 
61  onUnitProgressChanged: d.updateState()
62  clip: root.partiallyOpened
63 
64  IndicatorsLight {
65  id: indicatorLights
66  }
67 
68  // eater
69  MouseArea {
70  anchors.fill: parent
71  }
72 
73  MenuContent {
74  id: content
75  objectName: "menuContent"
76 
77  anchors {
78  left: parent.left
79  right: parent.right
80  top: bar.bottom
81  }
82  height: openedHeight - bar.height - handle.height
83  indicatorsModel: root.indicatorsModel
84  visible: root.unitProgress > 0
85  enabled: contentEnabled
86  currentMenuIndex: bar.currentItemIndex
87  }
88 
89  Handle {
90  id: handle
91  anchors {
92  left: parent.left
93  right: parent.right
94  bottom: parent.bottom
95  }
96  height: units.gu(2)
97  active: d.activeDragHandle ? true : false
98 
99  //small shadow gradient at bottom of menu
100  Rectangle {
101  anchors {
102  left: parent.left
103  right: parent.right
104  bottom: parent.top
105  }
106  height: units.gu(0.5)
107  gradient: Gradient {
108  GradientStop { position: 0.0; color: "transparent" }
109  GradientStop { position: 1.0; color: "black" }
110  }
111  opacity: 0.3
112  }
113  }
114 
115  Rectangle {
116  anchors.fill: bar
117  color: panelColor
118  }
119 
120  IndicatorsBar {
121  id: bar
122  objectName: "indicatorsBar"
123 
124  anchors {
125  left: parent.left
126  right: parent.right
127  }
128  expanded: false
129  enableLateralChanges: false
130  lateralPosition: -1
131  unitProgress: root.unitProgress
132 
133  height: expanded ? expandedPanelHeight : minimizedPanelHeight
134  Behavior on height { NumberAnimation { duration: UbuntuAnimation.SnapDuration; easing: UbuntuAnimation.StandardEasing } }
135  }
136 
137  ScrollCalculator {
138  id: leftScroller
139  width: units.gu(5)
140  anchors.left: bar.left
141  height: bar.height
142 
143  forceScrollingPercentage: 0.33
144  stopScrollThreshold: units.gu(0.75)
145  direction: Qt.RightToLeft
146  lateralPosition: -1
147 
148  onScroll: bar.addScrollOffset(-scrollAmount);
149  }
150 
151  ScrollCalculator {
152  id: rightScroller
153  width: units.gu(5)
154  anchors.right: bar.right
155  height: bar.height
156 
157  forceScrollingPercentage: 0.33
158  stopScrollThreshold: units.gu(0.75)
159  direction: Qt.LeftToRight
160  lateralPosition: -1
161 
162  onScroll: bar.addScrollOffset(scrollAmount);
163  }
164 
165  DragHandle {
166  id: __showDragHandle
167  anchors.bottom: parent.bottom
168  anchors.left: parent.left
169  anchors.right: parent.right
170  height: minimizedPanelHeight
171  direction: Direction.Downwards
172  enabled: !root.shown && root.available
173  autoCompleteDragThreshold: maxTotalDragDistance / 2
174  stretch: true
175  distanceThreshold: enableHint ? 0 : minimizedPanelHeight
176 
177  onTapped: showTapped(Qt.point(touchSceneX, touchSceneY));
178 
179  // using hint regulates minimum to hint displacement, but in fullscreen mode, we need to do it manually.
180  overrideStartValue: enableHint ? minimizedPanelHeight : expandedPanelHeight + handle.height
181  maxTotalDragDistance: openedHeight - (enableHint ? minimizedPanelHeight : expandedPanelHeight + handle.height)
182  hintDisplacement: enableHint ? expandedPanelHeight - minimizedPanelHeight + handle.height : 0
183  }
184 
185  DragHandle {
186  id: __hideDragHandle
187  anchors.fill: handle
188  direction: Direction.Upwards
189  enabled: root.shown && root.available
190  hintDisplacement: units.gu(3)
191  autoCompleteDragThreshold: maxTotalDragDistance / 6
192  stretch: true
193  maxTotalDragDistance: openedHeight - expandedPanelHeight - handle.height
194 
195  onTouchSceneXChanged: {
196  if (root.state === "locked") {
197  d.xDisplacementSinceLock += (touchSceneX - d.lastHideTouchSceneX)
198  d.lastHideTouchSceneX = touchSceneX;
199  }
200  }
201  }
202 
203  PanelVelocityCalculator {
204  id: yVelocityCalculator
205  velocityThreshold: d.hasCommitted ? 0.1 : 0.3
206  trackedValue: d.activeDragHandle ? d.activeDragHandle.touchSceneY : 0
207 
208  onVelocityAboveThresholdChanged: d.updateState()
209  }
210 
211  Connections {
212  target: showAnimation
213  onRunningChanged: {
214  if (showAnimation.running) {
215  root.state = "commit";
216  }
217  }
218  }
219 
220  Connections {
221  target: hideAnimation
222  onRunningChanged: {
223  if (hideAnimation.running) {
224  root.state = "initial";
225  }
226  }
227  }
228 
229  QtObject {
230  id: d
231  property var activeDragHandle: showDragHandle.dragging ? showDragHandle : hideDragHandle.dragging ? hideDragHandle : null
232  property bool hasCommitted: false
233  property real lastHideTouchSceneX: 0
234  property real xDisplacementSinceLock: 0
235  onXDisplacementSinceLockChanged: d.updateState()
236 
237  property real rowMappedLateralPosition: {
238  if (!d.activeDragHandle) return -1;
239  return d.activeDragHandle.mapToItem(bar, d.activeDragHandle.touchX, 0).x;
240  }
241 
242  function updateState() {
243  if (!showAnimation.running && !hideAnimation.running) {
244  if (unitProgress <= 0) {
245  root.state = "initial";
246  // lock indicator if we've been committed and aren't moving too much laterally or too fast up.
247  } else if (d.hasCommitted && (Math.abs(d.xDisplacementSinceLock) < units.gu(2) || yVelocityCalculator.velocityAboveThreshold)) {
248  root.state = "locked";
249  } else {
250  root.state = "reveal";
251  }
252  }
253  }
254  }
255 
256  states: [
257  State {
258  name: "initial"
259  PropertyChanges { target: d; hasCommitted: false; restoreEntryValues: false }
260  },
261  State {
262  name: "reveal"
263  StateChangeScript {
264  script: {
265  yVelocityCalculator.reset();
266  // initial item selection
267  if (!d.hasCommitted) bar.selectItemAt(d.activeDragHandle ? d.activeDragHandle.touchX : -1);
268  d.hasCommitted = false;
269  }
270  }
271  PropertyChanges {
272  target: bar
273  expanded: true
274  // changes to lateral touch position effect which indicator is selected
275  lateralPosition: d.rowMappedLateralPosition
276  // vertical velocity determines if changes in lateral position has an effect
277  enableLateralChanges: d.activeDragHandle &&
278  !yVelocityCalculator.velocityAboveThreshold
279  }
280  // left scroll bar handling
281  PropertyChanges {
282  target: leftScroller
283  lateralPosition: {
284  if (!d.activeDragHandle) return -1;
285  var mapped = d.activeDragHandle.mapToItem(leftScroller, d.activeDragHandle.touchX, 0);
286  return mapped.x;
287  }
288  }
289  // right scroll bar handling
290  PropertyChanges {
291  target: rightScroller
292  lateralPosition: {
293  if (!d.activeDragHandle) return -1;
294  var mapped = d.activeDragHandle.mapToItem(rightScroller, d.activeDragHandle.touchX, 0);
295  return mapped.x;
296  }
297  }
298  },
299  State {
300  name: "locked"
301  StateChangeScript {
302  script: {
303  d.xDisplacementSinceLock = 0;
304  d.lastHideTouchSceneX = hideDragHandle.touchSceneX;
305  }
306  }
307  PropertyChanges { target: bar; expanded: true }
308  },
309  State {
310  name: "commit"
311  extend: "locked"
312  PropertyChanges { target: bar; interactive: true }
313  PropertyChanges {
314  target: d;
315  hasCommitted: true
316  lastHideTouchSceneX: 0
317  xDisplacementSinceLock: 0
318  restoreEntryValues: false
319  }
320  }
321  ]
322  state: "initial"
323 }