// -*- mode: js; js-indent-level: 4; indent-tabs-mode: nil -*-
const { Clutter, GObject, Meta, St } = imports.gi;
const Params = imports.misc.params;
const Tweener = imports.ui.tweener;
const Main = imports.ui.main;
var ICON_SIZE = 96;
var MIN_ICON_SIZE = 16;
var EXTRA_SPACE_ANIMATION_TIME = 0.25;
var ANIMATION_TIME_IN = 0.350;
var ANIMATION_TIME_OUT = 1/2 * ANIMATION_TIME_IN;
var ANIMATION_MAX_DELAY_FOR_ITEM = 2/3 * ANIMATION_TIME_IN;
var ANIMATION_BASE_DELAY_FOR_ITEM = 1/4 * ANIMATION_MAX_DELAY_FOR_ITEM;
var ANIMATION_MAX_DELAY_OUT_FOR_ITEM = 2/3 * ANIMATION_TIME_OUT;
var ANIMATION_FADE_IN_TIME_FOR_ITEM = 1/4 * ANIMATION_TIME_IN;
var ANIMATION_BOUNCE_ICON_SCALE = 1.1;
var AnimationDirection = {
IN: 0,
OUT: 1
};
var APPICON_ANIMATION_OUT_SCALE = 3;
var APPICON_ANIMATION_OUT_TIME = 0.25;
var BaseIcon = GObject.registerClass(
class BaseIcon extends St.Bin {
_init(label, params) {
params = Params.parse(params, { createIcon: null,
setSizeManually: false,
showLabel: true });
let styleClass = 'overview-icon';
if (params.showLabel)
styleClass += ' overview-icon-with-label';
super._init({ style_class: styleClass,
x_fill: true,
y_fill: true });
this.actor = this;
this.connect('destroy', this._onDestroy.bind(this));
this._box = new St.BoxLayout({ vertical: true });
this.set_child(this._box);
this.iconSize = ICON_SIZE;
this._iconBin = new St.Bin({ x_align: St.Align.MIDDLE,
y_align: St.Align.MIDDLE });
this._box.add_actor(this._iconBin);
if (params.showLabel) {
this.label = new St.Label({ text: label });
this._box.add_actor(this.label);
} else {
this.label = null;
}
if (params.createIcon)
this.createIcon = params.createIcon;
this._setSizeManually = params.setSizeManually;
this.icon = null;
let cache = St.TextureCache.get_default();
this._iconThemeChangedId = cache.connect('icon-theme-changed', this._onIconThemeChanged.bind(this));
}
vfunc_get_preferred_width(forHeight) {
// Return the actual height to keep the squared aspect
return this.get_preferred_height(-1);
}
// This can be overridden by a subclass, or by the createIcon
// parameter to _init()
createIcon(size) {
throw new Error('no implementation of createIcon in ' + this);
}
setIconSize(size) {
if (!this._setSizeManually)
throw new Error('setSizeManually has to be set to use setIconsize');
if (size == this.iconSize)
return;
this._createIconTexture(size);
}
_createIconTexture(size) {
if (this.icon)
this.icon.destroy();
this.iconSize = size;
this.icon = this.createIcon(this.iconSize);
this._iconBin.child = this.icon;
}
vfunc_style_changed() {
super.vfunc_style_changed();
let node = this.get_theme_node();
let size;
if (this._setSizeManually) {
size = this.iconSize;
} else {
let [found, len] = node.lookup_length('icon-size', false);
size = found ? len : ICON_SIZE;
}
if (this.iconSize == size && this._iconBin.child)
return;
this._createIconTexture(size);
}
_onDestroy() {
if (this._iconThemeChangedId > 0) {
let cache = St.TextureCache.get_default();
cache.disconnect(this._iconThemeChangedId);
this._iconThemeChangedId = 0;
}
}
_onIconThemeChanged() {
this._createIconTexture(this.iconSize);
}
animateZoomOut() {
// Animate only the child instead of the entire actor, so the
// styles like hover and running are not applied while
// animating.
zoomOutActor(this.child);
}
});
function clamp(value, min, max) {
return Math.max(Math.min(value, max), min);
};
function zoomOutActor(actor) {
let actorClone = new Clutter.Clone({ source: actor,
reactive: false });
let [width, height] = actor.get_transformed_size();
let [x, y] = actor.get_transformed_position();
actorClone.set_size(width, height);
actorClone.set_position(x, y);
actorClone.opacity = 255;
actorClone.set_pivot_point(0.5, 0.5);
Main.uiGroup.add_actor(actorClone);
// Avoid monitor edges to not zoom outside the current monitor
let monitor = Main.layoutManager.findMonitorForActor(actor);
let scaledWidth = width * APPICON_ANIMATION_OUT_SCALE;
let scaledHeight = height * APPICON_ANIMATION_OUT_SCALE;
let scaledX = x - (scaledWidth - width) / 2;
let scaledY = y - (scaledHeight - height) / 2;
let containedX = clamp(scaledX, monitor.x, monitor.x + monitor.width - scaledWidth);
let containedY = clamp(scaledY, monitor.y, monitor.y + monitor.height - scaledHeight);
Tweener.addTween(actorClone,
{ time: APPICON_ANIMATION_OUT_TIME,
scale_x: APPICON_ANIMATION_OUT_SCALE,
scale_y: APPICON_ANIMATION_OUT_SCALE,
translation_x: containedX - scaledX,
translation_y: containedY - scaledY,
opacity: 0,
transition: 'easeOutQuad',
onComplete() {
actorClone.destroy();
}
});
}
var IconGrid = GObject.registerClass({
Signals: {'animation-done': {},
'child-focused': { param_types: [Clutter.Actor.$gtype]} },
}, class IconGrid extends St.Widget {
_init(params) {
super._init({ style_class: 'icon-grid',
y_align: Clutter.ActorAlign.START });
this.actor = this;
params = Params.parse(params, { rowLimit: null,
columnLimit: null,
minRows: 1,
minColumns: 1,
fillParent: false,
xAlign: St.Align.MIDDLE,
padWithSpacing: false });
this._rowLimit = params.rowLimit;
this._colLimit = params.columnLimit;
this._minRows = params.minRows;
this._minColumns = params.minColumns;
this._xAlign = params.xAlign;
this._fillParent = params.fillParent;
this._padWithSpacing = params.padWithSpacing;
this.topPadding = 0;
this.bottomPadding = 0;
this.rightPadding = 0;
this.leftPadding = 0;
this._items = [];
this._clonesAnimating = [];
// Pulled from CSS, but hardcode some defaults here
this._spacing = 0;
this._hItemSize = this._vItemSize = ICON_SIZE;
this._fixedHItemSize = this._fixedVItemSize = undefined;
this.connect('style-changed', this._onStyleChanged.bind(this));
// Cancel animations when hiding the overview, to avoid icons
// swarming into the void ...
this.connect('notify::mapped', () => {
if (!this.mapped)
this._cancelAnimation();
});
this.connect('actor-added', this._childAdded.bind(this));
this.connect('actor-removed', this._childRemoved.bind(this));
}
_keyFocusIn(actor) {
this.emit('child-focused', actor);
}
_childAdded(grid, child) {
child._iconGridKeyFocusInId = child.connect('key-focus-in', this._keyFocusIn.bind(this));
}
_childRemoved(grid, child) {
child.disconnect(child._iconGridKeyFocusInId);
}
vfunc_get_preferred_width(forHeight) {
if (this._fillParent)
// Ignore all size requests of children and request a size of 0;
// later we'll allocate as many children as fit the parent
return [0, 0];
let nChildren = this.get_n_children();
let nColumns = this._colLimit ? Math.min(this._colLimit,
nChildren)
: nChildren;
let totalSpacing = Math.max(0, nColumns - 1) * this._getSpacing();
// Kind of a lie, but not really an issue right now. If
// we wanted to support some sort of hidden/overflow that would
// need higher level design
let minSize = this._getHItemSize() + this.leftPadding + this.rightPadding;
let natSize = nColumns * this._getHItemSize() + totalSpacing + this.leftPadding + this.rightPadding;
return this.get_theme_node().adjust_preferred_width(minSize, natSize);
}
_getVisibleChildren() {
return this.get_children().filter(actor => actor.visible);
}
vfunc_get_preferred_height(forWidth) {
if (this._fillParent)
// Ignore all size requests of children and request a size of 0;
// later we'll allocate as many children as fit the parent
return [0, 0];
let themeNode = this.get_theme_node();
let children = this._getVisibleChildren();
let nColumns;
forWidth = themeNode.adjust_for_width(forWidth);
if (forWidth < 0)
nColumns = children.length;
else
[nColumns, ] = this._computeLayout(forWidth);
let nRows;
if (nColumns > 0)
nRows = Math.ceil(children.length / nColumns);
else
nRows = 0;
if (this._rowLimit)
nRows = Math.min(nRows, this._rowLimit);
let totalSpacing = Math.max(0, nRows - 1) * this._getSpacing();
let height = nRows * this._getVItemSize() + totalSpacing + this.topPadding + this.bottomPadding;
return themeNode.adjust_preferred_height(height, height);
}
vfunc_allocate(box, flags) {
this.set_allocation(box, flags);
let themeNode = this.get_theme_node();
box = themeNode.get_content_box(box);
if (this._fillParent) {
// Reset the passed in box to fill the parent
let parentBox = this.get_parent().allocation;
let gridBox = themeNode.get_content_box(parentBox);
box = themeNode.get_content_box(gridBox);
}
let children = this._getVisibleChildren();
let availWidth = box.x2 - box.x1;
let availHeight = box.y2 - box.y1;
let spacing = this._getSpacing();
let [nColumns, usedWidth] = this._computeLayout(availWidth);
let leftEmptySpace;
switch(this._xAlign) {
case St.Align.START:
leftEmptySpace = 0;
break;
case St.Align.MIDDLE:
leftEmptySpace = Math.floor((availWidth - usedWidth) / 2);
break;
case St.Align.END:
leftEmptySpace = availWidth - usedWidth;
}
let x = box.x1 + leftEmptySpace + this.leftPadding;
let y = box.y1 + this.topPadding;
let columnIndex = 0;
let rowIndex = 0;
for (let i = 0; i < children.length; i++) {
let childBox = this._calculateChildBox(children[i], x, y, box);
if (this._rowLimit && rowIndex >= this._rowLimit ||
this._fillParent && childBox.y2 > availHeight - this.bottomPadding) {
children[i].hide();
} else {
children[i].allocate(childBox, flags);
children[i].show();
}
columnIndex++;
if (columnIndex == nColumns) {
columnIndex = 0;
rowIndex++;
}
if (columnIndex == 0) {
y += this._getVItemSize() + spacing;
x = box.x1 + leftEmptySpace + this.leftPadding;
} else {
x += this._getHItemSize() + spacing;
}
}
}
vfunc_get_paint_volume(paintVolume) {
// Setting the paint volume does not make sense when we don't have
// any allocation
if (!this.has_allocation())
return false;
let themeNode = this.get_theme_node();
let allocationBox = this.get_allocation_box();
let paintBox = themeNode.get_paint_box(allocationBox);
let origin = new Clutter.Vertex();
origin.x = paintBox.x1 - allocationBox.x1;
origin.y = paintBox.y1 - allocationBox.y1;
origin.z = 0.0;
paintVolume.set_origin(origin);
paintVolume.set_width(paintBox.x2 - paintBox.x1);
paintVolume.set_height(paintBox.y2 - paintBox.y1);
if (this.get_clip_to_allocation())
return true;
for (let child = this.get_first_child();
child != null;
child = child.get_next_sibling()) {
if (!child.visible)
continue;
let childVolume = child.get_transformed_paint_volume(this);
if (!childVolume)
return false
paintVolume.union(childVolume);
}
return true;
}
/**
* Intended to be override by subclasses if they need a different
* set of items to be animated.
*/
_getChildrenToAnimate() {
return this._getVisibleChildren();
}
_cancelAnimation() {
this._clonesAnimating.forEach(clone => { clone.destroy(); });
this._clonesAnimating = [];
}
_animationDone() {
this._clonesAnimating.forEach(clone => {
clone.source.reactive = true;
clone.source.opacity = 255;
clone.destroy();
});
this._clonesAnimating = [];
this.emit('animation-done');
}
animatePulse(animationDirection) {
if (animationDirection != AnimationDirection.IN)
throw new Error("Pulse animation only implements 'in' animation direction");
this._cancelAnimation();
let actors = this._getChildrenToAnimate();
if (actors.length == 0) {
this._animationDone();
return;
}
// For few items the animation can be slow, so use a smaller
// delay when there are less than 4 items
// (ANIMATION_BASE_DELAY_FOR_ITEM = 1/4 *
// ANIMATION_MAX_DELAY_FOR_ITEM)
let maxDelay = Math.min(ANIMATION_BASE_DELAY_FOR_ITEM * actors.length,
ANIMATION_MAX_DELAY_FOR_ITEM);
for (let index = 0; index < actors.length; index++) {
let actor = actors[index];
actor.set_scale(0, 0);
actor.set_pivot_point(0.5, 0.5);
let delay = index / actors.length * maxDelay;
let bounceUpTime = ANIMATION_TIME_IN / 4;
let isLastItem = index == actors.length - 1;
Tweener.addTween(actor,
{ time: bounceUpTime,
transition: 'easeInOutQuad',
delay: delay,
scale_x: ANIMATION_BOUNCE_ICON_SCALE,
scale_y: ANIMATION_BOUNCE_ICON_SCALE,
onComplete: () => {
Tweener.addTween(actor,
{ time: ANIMATION_TIME_IN - bounceUpTime,
transition: 'easeInOutQuad',
scale_x: 1,
scale_y: 1,
onComplete: () => {
if (isLastItem)
this._animationDone();
}
});
}
});
}
}
animateSpring(animationDirection, sourceActor) {
this._cancelAnimation();
let actors = this._getChildrenToAnimate();
if (actors.length == 0) {
this._animationDone();
return;
}
let [sourceX, sourceY] = sourceActor.get_transformed_position();
let [sourceWidth, sourceHeight] = sourceActor.get_size();
// Get the center
let [sourceCenterX, sourceCenterY] = [sourceX + sourceWidth / 2, sourceY + sourceHeight / 2];
// Design decision, 1/2 of the source actor size.
let [sourceScaledWidth, sourceScaledHeight] = [sourceWidth / 2, sourceHeight / 2];
actors.forEach(actor => {
let [actorX, actorY] = actor._transformedPosition = actor.get_transformed_position();
let [x, y] = [actorX - sourceX, actorY - sourceY];
actor._distance = Math.sqrt(x * x + y * y);
});
let maxDist = actors.reduce((prev, cur) => {
return Math.max(prev, cur._distance);
}, 0);
let minDist = actors.reduce((prev, cur) => {
return Math.min(prev, cur._distance);
}, Infinity);
let normalization = maxDist - minDist;
for (let index = 0; index < actors.length; index++) {
let actor = actors[index];
actor.opacity = 0;
actor.reactive = false;
let actorClone = new Clutter.Clone({ source: actor });
this._clonesAnimating.push(actorClone);
Main.uiGroup.add_actor(actorClone);
let [width, height,,] = this._getAllocatedChildSizeAndSpacing(actor);
actorClone.set_size(width, height);
let scaleX = sourceScaledWidth / width;
let scaleY = sourceScaledHeight / height;
let [adjustedSourcePositionX, adjustedSourcePositionY] = [sourceCenterX - sourceScaledWidth / 2, sourceCenterY - sourceScaledHeight / 2];
let movementParams, fadeParams;
if (animationDirection == AnimationDirection.IN) {
let isLastItem = actor._distance == minDist;
actorClone.opacity = 0;
actorClone.set_scale(scaleX, scaleY);
actorClone.set_position(adjustedSourcePositionX, adjustedSourcePositionY);
let delay = (1 - (actor._distance - minDist) / normalization) * ANIMATION_MAX_DELAY_FOR_ITEM;
let [finalX, finalY] = actor._transformedPosition;
movementParams = { time: ANIMATION_TIME_IN,
transition: 'easeInOutQuad',
delay: delay,
x: finalX,
y: finalY,
scale_x: 1,
scale_y: 1,
onComplete: () => {
if (isLastItem)
this._animationDone();
}};
fadeParams = { time: ANIMATION_FADE_IN_TIME_FOR_ITEM,
transition: 'easeInOutQuad',
delay: delay,
opacity: 255 };
} else {
let isLastItem = actor._distance == maxDist;
let [startX, startY] = actor._transformedPosition;
actorClone.set_position(startX, startY);
let delay = (actor._distance - minDist) / normalization * ANIMATION_MAX_DELAY_OUT_FOR_ITEM;
movementParams = { time: ANIMATION_TIME_OUT,
transition: 'easeInOutQuad',
delay: delay,
x: adjustedSourcePositionX,
y: adjustedSourcePositionY,
scale_x: scaleX,
scale_y: scaleY,
onComplete: () => {
if (isLastItem)
this._animationDone();
}};
fadeParams = { time: ANIMATION_FADE_IN_TIME_FOR_ITEM,
transition: 'easeInOutQuad',
delay: ANIMATION_TIME_OUT + delay - ANIMATION_FADE_IN_TIME_FOR_ITEM,
opacity: 0 };
}
Tweener.addTween(actorClone, movementParams);
Tweener.addTween(actorClone, fadeParams);
}
}
_getAllocatedChildSizeAndSpacing(child) {
let [,, natWidth, natHeight] = child.get_preferred_size();
let width = Math.min(this._getHItemSize(), natWidth);
let xSpacing = Math.max(0, width - natWidth) / 2;
let height = Math.min(this._getVItemSize(), natHeight);
let ySpacing = Math.max(0, height - natHeight) / 2;
return [width, height, xSpacing, ySpacing];
}
_calculateChildBox(child, x, y, box) {
/* Center the item in its allocation horizontally */
let [width, height, childXSpacing, childYSpacing] =
this._getAllocatedChildSizeAndSpacing(child);
let childBox = new Clutter.ActorBox();
if (Clutter.get_default_text_direction() == Clutter.TextDirection.RTL) {
let _x = box.x2 - (x + width);
childBox.x1 = Math.floor(_x - childXSpacing);
} else {
childBox.x1 = Math.floor(x + childXSpacing);
}
childBox.y1 = Math.floor(y + childYSpacing);
childBox.x2 = childBox.x1 + width;
childBox.y2 = childBox.y1 + height;
return childBox;
}
columnsForWidth(rowWidth) {
return this._computeLayout(rowWidth)[0];
}
getRowLimit() {
return this._rowLimit;
}
_computeLayout(forWidth) {
let nColumns = 0;
let usedWidth = this.leftPadding + this.rightPadding;
let spacing = this._getSpacing();
while ((this._colLimit == null || nColumns < this._colLimit) &&
(usedWidth + this._getHItemSize() <= forWidth)) {
usedWidth += this._getHItemSize() + spacing;
nColumns += 1;
}
if (nColumns > 0)
usedWidth -= spacing;
return [nColumns, usedWidth];
}
_onStyleChanged() {
let themeNode = this.get_theme_node();
this._spacing = themeNode.get_length('spacing');
this._hItemSize = themeNode.get_length('-shell-grid-horizontal-item-size') || ICON_SIZE;
this._vItemSize = themeNode.get_length('-shell-grid-vertical-item-size') || ICON_SIZE;
this.queue_relayout();
}
nRows(forWidth) {
let children = this._getVisibleChildren();
let nColumns = (forWidth < 0) ? children.length : this._computeLayout(forWidth)[0];
let nRows = (nColumns > 0) ? Math.ceil(children.length / nColumns) : 0;
if (this._rowLimit)
nRows = Math.min(nRows, this._rowLimit);
return nRows;
}
rowsForHeight(forHeight) {
return Math.floor((forHeight - (this.topPadding + this.bottomPadding) + this._getSpacing()) / (this._getVItemSize() + this._getSpacing()));
}
usedHeightForNRows(nRows) {
return (this._getVItemSize() + this._getSpacing()) * nRows - this._getSpacing() + this.topPadding + this.bottomPadding;
}
usedWidth(forWidth) {
return this.usedWidthForNColumns(this.columnsForWidth(forWidth));
}
usedWidthForNColumns(columns) {
let usedWidth = columns * (this._getHItemSize() + this._getSpacing());
usedWidth -= this._getSpacing();
return usedWidth + this.leftPadding + this.rightPadding;
}
removeAll() {
this._items = [];
this.remove_all_children();
}
destroyAll() {
this._items = [];
this.destroy_all_children();
}
addItem(item, index) {
if (!(item.icon instanceof BaseIcon))
throw new Error('Only items with a BaseIcon icon property can be added to IconGrid');
this._items.push(item);
if (index !== undefined)
this.insert_child_at_index(item.actor, index);
else
this.add_actor(item.actor);
}
removeItem(item) {
this.remove_child(item.actor);
}
getItemAtIndex(index) {
return this.get_child_at_index(index);
}
visibleItemsCount() {
return this.get_children().filter(c => c.is_visible()).length;
}
setSpacing(spacing) {
this._fixedSpacing = spacing;
}
_getSpacing() {
return this._fixedSpacing ? this._fixedSpacing : this._spacing;
}
_getHItemSize() {
return this._fixedHItemSize ? this._fixedHItemSize : this._hItemSize;
}
_getVItemSize() {
return this._fixedVItemSize ? this._fixedVItemSize : this._vItemSize;
}
_updateSpacingForSize(availWidth, availHeight) {
let maxEmptyVArea = availHeight - this._minRows * this._getVItemSize();
let maxEmptyHArea = availWidth - this._minColumns * this._getHItemSize();
let maxHSpacing, maxVSpacing;
if (this._padWithSpacing) {
// minRows + 1 because we want to put spacing before the first row, so it is like we have one more row
// to divide the empty space
maxVSpacing = Math.floor(maxEmptyVArea / (this._minRows +1));
maxHSpacing = Math.floor(maxEmptyHArea / (this._minColumns +1));
} else {
if (this._minRows <= 1)
maxVSpacing = maxEmptyVArea;
else
maxVSpacing = Math.floor(maxEmptyVArea / (this._minRows - 1));
if (this._minColumns <= 1)
maxHSpacing = maxEmptyHArea;
else
maxHSpacing = Math.floor(maxEmptyHArea / (this._minColumns - 1));
}
let maxSpacing = Math.min(maxHSpacing, maxVSpacing);
// Limit spacing to the item size
maxSpacing = Math.min(maxSpacing, Math.min(this._getVItemSize(), this._getHItemSize()));
// The minimum spacing, regardless of whether it satisfies the row/columng minima,
// is the spacing we get from CSS.
let spacing = Math.max(this._spacing, maxSpacing);
this.setSpacing(spacing);
if (this._padWithSpacing)
this.topPadding = this.rightPadding = this.bottomPadding = this.leftPadding = spacing;
}
/**
* This function must to be called before iconGrid allocation,
* to know how much spacing can the grid has
*/
adaptToSize(availWidth, availHeight) {
this._fixedHItemSize = this._hItemSize;
this._fixedVItemSize = this._vItemSize;
this._updateSpacingForSize(availWidth, availHeight);
let spacing = this._getSpacing();
if (this.columnsForWidth(availWidth) < this._minColumns || this.rowsForHeight(availHeight) < this._minRows) {
let neededWidth = this.usedWidthForNColumns(this._minColumns) - availWidth ;
let neededHeight = this.usedHeightForNRows(this._minRows) - availHeight ;
let neededSpacePerItem = (neededWidth > neededHeight) ? Math.ceil(neededWidth / this._minColumns)
: Math.ceil(neededHeight / this._minRows);
this._fixedHItemSize = Math.max(this._hItemSize - neededSpacePerItem, MIN_ICON_SIZE);
this._fixedVItemSize = Math.max(this._vItemSize - neededSpacePerItem, MIN_ICON_SIZE);
this._updateSpacingForSize(availWidth, availHeight);
}
Meta.later_add(Meta.LaterType.BEFORE_REDRAW,
this._updateIconSizes.bind(this));
}
// Note that this is ICON_SIZE as used by BaseIcon, not elsewhere in IconGrid; it's a bit messed up
_updateIconSizes() {
let scale = Math.min(this._fixedHItemSize, this._fixedVItemSize) / Math.max(this._hItemSize, this._vItemSize);
let newIconSize = Math.floor(ICON_SIZE * scale);
for (let i in this._items) {
this._items[i].icon.setIconSize(newIconSize);
}
}
});
var PaginatedIconGrid = GObject.registerClass({
Signals: {'space-opened': {},
'space-closed': {} },
}, class PaginatedIconGrid extends IconGrid {
_init(params) {
super._init(params);
this._nPages = 0;
this.currentPage = 0;
this._rowsPerPage = 0;
this._spaceBetweenPages = 0;
this._childrenPerPage = 0;
}
vfunc_get_preferred_height(forWidth) {
let height = (this._availableHeightPerPageForItems() + this.bottomPadding + this.topPadding) * this._nPages + this._spaceBetweenPages * this._nPages;
return [height, height];
}
vfunc_allocate(box, flags) {
if (this._childrenPerPage == 0)
log('computePages() must be called before allocate(); pagination will not work.');
this.set_allocation(box, flags);
if (this._fillParent) {
// Reset the passed in box to fill the parent
let parentBox = this.get_parent().allocation;
let gridBox = this.get_theme_node().get_content_box(parentBox);
box = this.get_theme_node().get_content_box(gridBox);
}
let children = this._getVisibleChildren();
let availWidth = box.x2 - box.x1;
let availHeight = box.y2 - box.y1;
let spacing = this._getSpacing();
let [nColumns, usedWidth] = this._computeLayout(availWidth);
let leftEmptySpace;
switch(this._xAlign) {
case St.Align.START:
leftEmptySpace = 0;
break;
case St.Align.MIDDLE:
leftEmptySpace = Math.floor((availWidth - usedWidth) / 2);
break;
case St.Align.END:
leftEmptySpace = availWidth - usedWidth;
}
let x = box.x1 + leftEmptySpace + this.leftPadding;
let y = box.y1 + this.topPadding;
let columnIndex = 0;
let rowIndex = 0;
for (let i = 0; i < children.length; i++) {
let childBox = this._calculateChildBox(children[i], x, y, box);
children[i].allocate(childBox, flags);
children[i].show();
columnIndex++;
if (columnIndex == nColumns) {
columnIndex = 0;
rowIndex++;
}
if (columnIndex == 0) {
y += this._getVItemSize() + spacing;
if ((i + 1) % this._childrenPerPage == 0)
y += this._spaceBetweenPages - spacing + this.bottomPadding + this.topPadding;
x = box.x1 + leftEmptySpace + this.leftPadding;
} else
x += this._getHItemSize() + spacing;
}
}
// Overriden from IconGrid
_getChildrenToAnimate() {
let children = this._getVisibleChildren();
let firstIndex = this._childrenPerPage * this.currentPage;
let lastIndex = firstIndex + this._childrenPerPage;
return children.slice(firstIndex, lastIndex);
}
_computePages(availWidthPerPage, availHeightPerPage) {
let [nColumns, usedWidth] = this._computeLayout(availWidthPerPage);
let nRows;
let children = this._getVisibleChildren();
if (nColumns > 0)
nRows = Math.ceil(children.length / nColumns);
else
nRows = 0;
if (this._rowLimit)
nRows = Math.min(nRows, this._rowLimit);
let spacing = this._getSpacing();
// We want to contain the grid inside the parent box with padding
this._rowsPerPage = this.rowsForHeight(availHeightPerPage);
this._nPages = Math.ceil(nRows / this._rowsPerPage);
this._spaceBetweenPages = availHeightPerPage - (this.topPadding + this.bottomPadding) - this._availableHeightPerPageForItems();
this._childrenPerPage = nColumns * this._rowsPerPage;
}
adaptToSize(availWidth, availHeight) {
super.adaptToSize(availWidth, availHeight);
this._computePages(availWidth, availHeight);
}
_availableHeightPerPageForItems() {
return this.usedHeightForNRows(this._rowsPerPage) - (this.topPadding + this.bottomPadding);
}
nPages() {
return this._nPages;
}
getPageHeight() {
return this._availableHeightPerPageForItems();
}
getPageY(pageNumber) {
if (!this._nPages)
return 0;
let firstPageItem = pageNumber * this._childrenPerPage
let childBox = this._getVisibleChildren()[firstPageItem].get_allocation_box();
return childBox.y1 - this.topPadding;
}
getItemPage(item) {
let children = this._getVisibleChildren();
let index = children.indexOf(item);
if (index == -1)
throw new Error('Item not found.');
return Math.floor(index / this._childrenPerPage);
}
/**
* openExtraSpace:
* @sourceItem: the item for which to create extra space
* @side: where @sourceItem should be located relative to the created space
* @nRows: the amount of space to create
*
* Pan view to create extra space for @nRows above or below @sourceItem.
*/
openExtraSpace(sourceItem, side, nRows) {
let children = this._getVisibleChildren();
let index = children.indexOf(sourceItem.actor);
if (index == -1)
throw new Error('Item not found.');
let pageIndex = Math.floor(index / this._childrenPerPage);
let pageOffset = pageIndex * this._childrenPerPage;
let childrenPerRow = this._childrenPerPage / this._rowsPerPage;
let sourceRow = Math.floor((index - pageOffset) / childrenPerRow);
let nRowsAbove = (side == St.Side.TOP) ? sourceRow + 1
: sourceRow;
let nRowsBelow = this._rowsPerPage - nRowsAbove;
let nRowsUp, nRowsDown;
if (side == St.Side.TOP) {
nRowsDown = Math.min(nRowsBelow, nRows);
nRowsUp = nRows - nRowsDown;
} else {
nRowsUp = Math.min(nRowsAbove, nRows);
nRowsDown = nRows - nRowsUp;
}
let childrenDown = children.splice(pageOffset +
nRowsAbove * childrenPerRow,
nRowsBelow * childrenPerRow);
let childrenUp = children.splice(pageOffset,
nRowsAbove * childrenPerRow);
// Special case: On the last row with no rows below the icon,
// there's no need to move any rows either up or down
if (childrenDown.length == 0 && nRowsUp == 0) {
this._translatedChildren = [];
this.emit('space-opened');
} else {
this._translateChildren(childrenUp, St.DirectionType.UP, nRowsUp);
this._translateChildren(childrenDown, St.DirectionType.DOWN, nRowsDown);
this._translatedChildren = childrenUp.concat(childrenDown);
}
}
_translateChildren(children, direction, nRows) {
let translationY = nRows * (this._getVItemSize() + this._getSpacing());
if (translationY == 0)
return;
if (direction == St.DirectionType.UP)
translationY *= -1;
for (let i = 0; i < children.length; i++) {
children[i].translation_y = 0;
let params = { translation_y: translationY,
time: EXTRA_SPACE_ANIMATION_TIME,
transition: 'easeInOutQuad'
};
if (i == (children.length - 1))
params.onComplete = () => { this.emit('space-opened'); };
Tweener.addTween(children[i], params);
}
}
closeExtraSpace() {
if (!this._translatedChildren || !this._translatedChildren.length) {
this.emit('space-closed');
return;
}
for (let i = 0; i < this._translatedChildren.length; i++) {
if (!this._translatedChildren[i].translation_y)
continue;
Tweener.addTween(this._translatedChildren[i],
{ translation_y: 0,
time: EXTRA_SPACE_ANIMATION_TIME,
transition: 'easeInOutQuad',
onComplete: () => { this.emit('space-closed'); }
});
}
}
});