gnome-shell/js/ui/iconGrid.js
Florian Müllner 63efe1db11 iconGrid: Don't use clones for pulse animation
The spring animation has to use clones to escape any clip set on the
parent, as it mainly occurs outside the parent. The same does not apply
to the pulse animation, which is very much in place - in fact, if the
parent is clipped (for instance a scrolled app folder), not having the
clip applied to the animated icons is indeed wrong.
Just animate the original grid actors instead, which gives the expected
result.

https://bugzilla.gnome.org/show_bug.cgi?id=736885
2014-09-22 20:46:41 +02:00

1017 lines
38 KiB
JavaScript

// -*- mode: js; js-indent-level: 4; indent-tabs-mode: nil -*-
const Clutter = imports.gi.Clutter;
const Gtk = imports.gi.Gtk;
const Meta = imports.gi.Meta;
const Shell = imports.gi.Shell;
const Signals = imports.signals;
const St = imports.gi.St;
const Lang = imports.lang;
const Params = imports.misc.params;
const Tweener = imports.ui.tweener;
const Main = imports.ui.main;
const ICON_SIZE = 96;
const MIN_ICON_SIZE = 16;
const EXTRA_SPACE_ANIMATION_TIME = 0.25;
const ANIMATION_TIME_IN = 0.350;
const ANIMATION_TIME_OUT = 1/2 * ANIMATION_TIME_IN;
const ANIMATION_MAX_DELAY_FOR_ITEM = 2/3 * ANIMATION_TIME_IN;
const ANIMATION_MAX_DELAY_OUT_FOR_ITEM = 2/3 * ANIMATION_TIME_OUT;
const ANIMATION_FADE_IN_TIME_FOR_ITEM = 1/4 * ANIMATION_TIME_IN;
const ANIMATION_BOUNCE_ICON_SCALE = 1.1;
const AnimationDirection = {
IN: 0,
OUT: 1
};
const APPICON_ANIMATION_OUT_SCALE = 3;
const APPICON_ANIMATION_OUT_TIME = 0.25;
const BaseIcon = new Lang.Class({
Name: 'BaseIcon',
_init : function(label, params) {
params = Params.parse(params, { createIcon: null,
setSizeManually: false,
showLabel: true });
let styleClass = 'overview-icon';
if (params.showLabel)
styleClass += ' overview-icon-with-label';
this.actor = new St.Bin({ style_class: styleClass,
x_fill: true,
y_fill: true });
this.actor._delegate = this;
this.actor.connect('style-changed',
Lang.bind(this, this._onStyleChanged));
this.actor.connect('destroy',
Lang.bind(this, this._onDestroy));
this._spacing = 0;
let box = new Shell.GenericContainer();
box.connect('allocate', Lang.bind(this, this._allocate));
box.connect('get-preferred-width',
Lang.bind(this, this._getPreferredWidth));
box.connect('get-preferred-height',
Lang.bind(this, this._getPreferredHeight));
this.actor.set_child(box);
this.iconSize = ICON_SIZE;
this._iconBin = new St.Bin({ x_align: St.Align.MIDDLE,
y_align: St.Align.MIDDLE });
box.add_actor(this._iconBin);
if (params.showLabel) {
this.label = new St.Label({ text: label });
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', Lang.bind(this, this._onIconThemeChanged));
},
_allocate: function(actor, box, flags) {
let availWidth = box.x2 - box.x1;
let availHeight = box.y2 - box.y1;
let iconSize = availHeight;
let [iconMinHeight, iconNatHeight] = this._iconBin.get_preferred_height(-1);
let [iconMinWidth, iconNatWidth] = this._iconBin.get_preferred_width(-1);
let preferredHeight = iconNatHeight;
let childBox = new Clutter.ActorBox();
if (this.label) {
let [labelMinHeight, labelNatHeight] = this.label.get_preferred_height(-1);
preferredHeight += this._spacing + labelNatHeight;
let labelHeight = availHeight >= preferredHeight ? labelNatHeight
: labelMinHeight;
iconSize -= this._spacing + labelHeight;
childBox.x1 = 0;
childBox.x2 = availWidth;
childBox.y1 = iconSize + this._spacing;
childBox.y2 = childBox.y1 + labelHeight;
this.label.allocate(childBox, flags);
}
childBox.x1 = Math.floor((availWidth - iconNatWidth) / 2);
childBox.y1 = Math.floor((iconSize - iconNatHeight) / 2);
childBox.x2 = childBox.x1 + iconNatWidth;
childBox.y2 = childBox.y1 + iconNatHeight;
this._iconBin.allocate(childBox, flags);
},
_getPreferredWidth: function(actor, forHeight, alloc) {
this._getPreferredHeight(actor, -1, alloc);
},
_getPreferredHeight: function(actor, forWidth, alloc) {
let [iconMinHeight, iconNatHeight] = this._iconBin.get_preferred_height(forWidth);
alloc.min_size = iconMinHeight;
alloc.natural_size = iconNatHeight;
if (this.label) {
let [labelMinHeight, labelNatHeight] = this.label.get_preferred_height(forWidth);
alloc.min_size += this._spacing + labelMinHeight;
alloc.natural_size += this._spacing + labelNatHeight;
}
},
// This can be overridden by a subclass, or by the createIcon
// parameter to _init()
createIcon: function(size) {
throw new Error('no implementation of createIcon in ' + this);
},
setIconSize: function(size) {
if (!this._setSizeManually)
throw new Error('setSizeManually has to be set to use setIconsize');
if (size == this.iconSize)
return;
this._createIconTexture(size);
},
_createIconTexture: function(size) {
if (this.icon)
this.icon.destroy();
this.iconSize = size;
this.icon = this.createIcon(this.iconSize);
this._iconBin.child = this.icon;
},
_onStyleChanged: function() {
let node = this.actor.get_theme_node();
this._spacing = node.get_length('spacing');
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: function() {
if (this._iconThemeChangedId > 0) {
let cache = St.TextureCache.get_default();
cache.disconnect(this._iconThemeChangedId);
this._iconThemeChangedId = 0;
}
},
_onIconThemeChanged: function() {
this._createIconTexture(this.iconSize);
},
animateZoomOut: function() {
// Animate only the child instead of the entire actor, so the
// styles like hover and running are not applied while
// animating.
zoomOutActor(this.actor.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: function() {
actorClone.destroy();
}
});
}
const IconGrid = new Lang.Class({
Name: 'IconGrid',
_init: function(params) {
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.actor = new St.BoxLayout({ style_class: 'icon-grid',
vertical: true });
this._items = [];
// Pulled from CSS, but hardcode some defaults here
this._spacing = 0;
this._hItemSize = this._vItemSize = ICON_SIZE;
this._fixedHItemSize = this._fixedVItemSize = undefined;
this._grid = new Shell.GenericContainer();
this.actor.add(this._grid, { expand: true, y_align: St.Align.START });
this.actor.connect('style-changed', Lang.bind(this, this._onStyleChanged));
this._grid.connect('get-preferred-width', Lang.bind(this, this._getPreferredWidth));
this._grid.connect('get-preferred-height', Lang.bind(this, this._getPreferredHeight));
this._grid.connect('allocate', Lang.bind(this, this._allocate));
this._grid.connect('actor-added', Lang.bind(this, this._childAdded));
this._grid.connect('actor-removed', Lang.bind(this, this._childRemoved));
},
_keyFocusIn: function(actor) {
this.emit('key-focus-in', actor);
},
_childAdded: function(grid, child) {
child._iconGridKeyFocusInId = child.connect('key-focus-in', Lang.bind(this, this._keyFocusIn));
},
_childRemoved: function(grid, child) {
child.disconnect(child._iconGridKeyFocusInId);
},
_getPreferredWidth: function (grid, forHeight, alloc) {
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;
let nChildren = this._grid.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
alloc.min_size = this._getHItemSize() + this.leftPadding + this.rightPadding;
alloc.natural_size = nColumns * this._getHItemSize() + totalSpacing + this.leftPadding + this.rightPadding;
},
_getVisibleChildren: function() {
let children = this._grid.get_children();
children = children.filter(function(actor) {
return actor.visible;
});
return children;
},
_getPreferredHeight: function (grid, forWidth, alloc) {
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;
let children = this._getVisibleChildren();
let nColumns;
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;
alloc.min_size = height;
alloc.natural_size = height;
},
_allocate: function (grid, box, flags) {
if (this._fillParent) {
// Reset the passed in box to fill the parent
let parentBox = this.actor.get_parent().allocation;
let gridBox = this.actor.get_theme_node().get_content_box(parentBox);
box = this._grid.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);
if (this._rowLimit && rowIndex >= this._rowLimit ||
this._fillParent && childBox.y2 > availHeight - this.bottomPadding) {
this._grid.set_skip_paint(children[i], true);
} else {
children[i].allocate(childBox, flags);
this._grid.set_skip_paint(children[i], false);
}
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;
}
}
},
/**
* Intended to be override by subclasses if they need a different
* set of items to be animated.
*/
_getChildrenToAnimate: function() {
return this._getVisibleChildren();
},
_animationDone: function() {
this._animating = false;
this.emit('animation-done');
},
animatePulse: function(animationDirection) {
if (animationDirection != AnimationDirection.IN)
throw new Error("Pulse animation only implements 'in' animation direction");
if (this._animating)
return;
this._animating = true;
let actors = this._getChildrenToAnimate();
if (actors.length == 0) {
this._animationDone();
return;
}
for (let index = 0; index < actors.length; index++) {
let actor = actors[index];
actor.reactive = false;
actor.set_scale(0, 0);
actor.set_pivot_point(0.5, 0.5);
let delay = index / actors.length * ANIMATION_MAX_DELAY_FOR_ITEM;
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: Lang.bind(this, function() {
Tweener.addTween(actor,
{ time: ANIMATION_TIME_IN - bounceUpTime,
transition: 'easeInOutQuad',
scale_x: 1,
scale_y: 1,
onComplete: Lang.bind(this, function() {
if (isLastItem)
this._animationDone();
actor.reactive = true;
})
});
})
});
}
},
animateSpring: function(animationDirection, sourceActor) {
if (this._animating)
return;
this._animating = true;
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(function(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(function(prev, cur) {
return Math.max(prev, cur._distance);
}, 0);
let minDist = actors.reduce(function(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 });
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: Lang.bind(this, function() {
if (isLastItem)
this._animationDone();
actor.opacity = 255;
actor.reactive = true;
actorClone.destroy();
})};
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: Lang.bind(this, function() {
if (isLastItem) {
this._animationDone();
this._restoreItemsOpacity();
}
actor.reactive = true;
actorClone.destroy();
})};
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);
}
},
_restoreItemsOpacity: function() {
for (let index = 0; index < this._items.length; index++) {
this._items[index].actor.opacity = 255;
}
},
_getAllocatedChildSizeAndSpacing: function(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: function(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: function(rowWidth) {
return this._computeLayout(rowWidth)[0];
},
getRowLimit: function() {
return this._rowLimit;
},
_computeLayout: function (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: function() {
let themeNode = this.actor.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._grid.queue_relayout();
},
nRows: function(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: function(forHeight) {
return Math.floor((forHeight - (this.topPadding + this.bottomPadding) + this._getSpacing()) / (this._getVItemSize() + this._getSpacing()));
},
usedHeightForNRows: function(nRows) {
return (this._getVItemSize() + this._getSpacing()) * nRows - this._getSpacing() + this.topPadding + this.bottomPadding;
},
usedWidth: function(forWidth) {
return this.usedWidthForNColumns(this.columnsForWidth(forWidth));
},
usedWidthForNColumns: function(columns) {
let usedWidth = columns * (this._getHItemSize() + this._getSpacing());
usedWidth -= this._getSpacing();
return usedWidth + this.leftPadding + this.rightPadding;
},
removeAll: function() {
this._items = [];
this._grid.remove_all_children();
},
destroyAll: function() {
this._items = [];
this._grid.destroy_all_children();
},
addItem: function(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._grid.insert_child_at_index(item.actor, index);
else
this._grid.add_actor(item.actor);
},
removeItem: function(item) {
this._grid.remove_child(item.actor);
},
getItemAtIndex: function(index) {
return this._grid.get_child_at_index(index);
},
visibleItemsCount: function() {
return this._grid.get_n_children() - this._grid.get_n_skip_paint();
},
setSpacing: function(spacing) {
this._fixedSpacing = spacing;
},
_getSpacing: function() {
return this._fixedSpacing ? this._fixedSpacing : this._spacing;
},
_getHItemSize: function() {
return this._fixedHItemSize ? this._fixedHItemSize : this._hItemSize;
},
_getVItemSize: function() {
return this._fixedVItemSize ? this._fixedVItemSize : this._vItemSize;
},
_updateSpacingForSize: function(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: function(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,
Lang.bind(this, this._updateIconSizes));
},
// Note that this is ICON_SIZE as used by BaseIcon, not elsewhere in IconGrid; it's a bit messed up
_updateIconSizes: function() {
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);
}
}
});
Signals.addSignalMethods(IconGrid.prototype);
const PaginatedIconGrid = new Lang.Class({
Name: 'PaginatedIconGrid',
Extends: IconGrid,
_init: function(params) {
this.parent(params);
this._nPages = 0;
this.currentPage = 0;
this._rowsPerPage = 0;
this._spaceBetweenPages = 0;
this._childrenPerPage = 0;
},
_getPreferredHeight: function (grid, forWidth, alloc) {
alloc.min_size = (this._availableHeightPerPageForItems() + this.bottomPadding + this.topPadding) * this._nPages + this._spaceBetweenPages * this._nPages;
alloc.natural_size = (this._availableHeightPerPageForItems() + this.bottomPadding + this.topPadding) * this._nPages + this._spaceBetweenPages * this._nPages;
},
_allocate: function (grid, box, flags) {
if (this._childrenPerPage == 0)
log('computePages() must be called before allocate(); pagination will not work.');
if (this._fillParent) {
// Reset the passed in box to fill the parent
let parentBox = this.actor.get_parent().allocation;
let gridBox = this.actor.get_theme_node().get_content_box(parentBox);
box = this._grid.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);
this._grid.set_skip_paint(children[i], false);
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: function() {
let children = this._getVisibleChildren();
let firstIndex = this._childrenPerPage * this.currentPage;
let lastIndex = firstIndex + this._childrenPerPage;
return children.slice(firstIndex, lastIndex);
},
_computePages: function (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: function(availWidth, availHeight) {
this.parent(availWidth, availHeight);
this._computePages(availWidth, availHeight);
},
_availableHeightPerPageForItems: function() {
return this.usedHeightForNRows(this._rowsPerPage) - (this.topPadding + this.bottomPadding);
},
nPages: function() {
return this._nPages;
},
getPageHeight: function() {
return this._availableHeightPerPageForItems();
},
getPageY: function(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: function(item) {
let children = this._getVisibleChildren();
let index = children.indexOf(item);
if (index == -1) {
throw new Error('Item not found.');
return 0;
}
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: function(sourceItem, side, nRows) {
let children = this._getVisibleChildren();
let index = children.indexOf(sourceItem.actor);
if (index == -1) {
throw new Error('Item not found.');
return;
}
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, Gtk.DirectionType.UP, nRowsUp);
this._translateChildren(childrenDown, Gtk.DirectionType.DOWN, nRowsDown);
this._translatedChildren = childrenUp.concat(childrenDown);
}
},
_translateChildren: function(children, direction, nRows) {
let translationY = nRows * (this._getVItemSize() + this._getSpacing());
if (translationY == 0)
return;
if (direction == Gtk.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 = Lang.bind(this,
function() {
this.emit('space-opened');
});
Tweener.addTween(children[i], params);
}
},
closeExtraSpace: function() {
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: Lang.bind(this,
function() {
this.emit('space-closed');
})
});
}
}
});
Signals.addSignalMethods(PaginatedIconGrid.prototype);