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Use a fading icon button in genericDisplay

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Add a new icon button in button.js that fades in/out with a short delay when the mouse enters/leaves its parent. Use it for the information button of genericDisplay.
This commit is contained in:
Milan Bouchet-Valat 2009-07-02 18:35:34 +02:00
parent 7a0ce6c57b
commit 3852176e80
2 changed files with 136 additions and 40 deletions
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107
js/ui/button.js
View File

@ -2,6 +2,11 @@
const Big = imports.gi.Big;
const Clutter = imports.gi.Clutter;
const Lang = imports.lang;
const Mainloop = imports.mainloop;
const Shell = imports.gi.Shell;
const Tweener = imports.ui.tweener;
const DEFAULT_BUTTON_COLOR = new Clutter.Color();
DEFAULT_BUTTON_COLOR.from_pixel(0xeeddcc66);
@ -112,3 +117,105 @@ Button.prototype = {
}
}
};
/* Delay before the icon should appear, in seconds after the pointer has entered the parent */
const SHOW_ICON_DELAY = 250; // 0.25 second
const ANIMATION_TIME = 0.25;
/* This is an icon button that fades in/out when mouse enters/leaves the parent.
* A delay is used before the fading starts. You can force it to be shown if needed.
*
* parent -- used to show/hide the button depending on mouse entering/leaving it
* size -- size in pixels of both the button and the icon it contains
* texture -- optional, must be used if the texture for the icon is already created (else, use setIconFromName)
*/
function iconButton(parent, size, icon) {
this._init(parent, size, icon);
}
iconButton.prototype = {
_init : function(parent, size, texture) {
this._size = size;
if(texture)
this.actor = texture;
else
this.actor = new Clutter.Texture({ width: this._size, height: this._size });
this.actor.set_reactive(true);
this.actor.set_opacity(0);
parent.connect("enter-event", Lang.bind(this, function(actor, event) {
this._shouldHide = false;
// Nothing to do if the cursor has come back from a child of the parent actor
if(actor.get_children().indexOf(Shell.get_event_related(event)) != -1)
return;
this._sourceId = Mainloop.timeout_add(SHOW_ICON_DELAY,
Lang.bind(this, this._fadeIn));
}));
parent.connect("leave-event", Lang.bind(this, function(actor, event) {
// Nothing to do if the cursor has merely entered a child of the parent actor
if(actor.get_children().indexOf(Shell.get_event_related(event)) != -1)
return;
// Remember that we should not be visible to hide the button if forceShow is unset
if(this._forceShow) {
this._shouldHide = true;
return;
}
this._fadeOut()
}));
},
/// Private methods ///
setIconFromName : function(iconName) {
let iconTheme = Gtk.IconTheme.get_default();
let iconInfo = iconTheme.lookup_icon(iconName, this._size, 0);
if (!iconInfo)
return;
let iconPath = iconInfo.get_filename();
this.actor.set_from_file(iconPath);
},
// Useful if we want to show the button immediately,
// e.g. in case the mouse is already in the parent when the button is created
show : function() {
this.actor.set_opacity(255);
},
// If show is true, prevents the button from fading out
forceShow : function(show) {
this._forceShow = show;
// Hide the button if it should have been hidden under normal conditions
if(!this._forceShow && this._shouldHide) {
this._fadeOut();
}
},
/// Private methods ///
_fadeIn : function() {
if(this._sourceId) {
Mainloop.source_remove(this._sourceId);
this._sourceId = null;
}
Tweener.removeTweens(this.actor);
Tweener.addTween(this.actor, { opacity: 255,
time: ANIMATION_TIME,
transition :"easeInQuad" });
},
_fadeOut : function() {
if(this._sourceId) {
Mainloop.source_remove(this._sourceId);
this._sourceId = null;
}
Tweener.removeTweens(this.actor);
Tweener.addTween(this.actor, { opacity: 0,
time: ANIMATION_TIME,
transition :"easeOutQuad" });
}
};

43
js/ui/genericDisplay.js
View File

@ -12,6 +12,7 @@ const Signals = imports.signals;
const Shell = imports.gi.Shell;
const Tidy = imports.gi.Tidy;
const Button = imports.ui.button;
const DND = imports.ui.dnd;
const Link = imports.ui.link;
@ -84,33 +85,30 @@ GenericDisplayItem.prototype = {
let global = Shell.Global.get();
let infoIconUri = "file://" + global.imagedir + "info.svg";
this._informationButton = Shell.TextureCache.get_default().load_uri_sync(infoIconUri,
let infoIcon = Shell.TextureCache.get_default().load_uri_sync(infoIconUri,
INFORMATION_BUTTON_SIZE,
INFORMATION_BUTTON_SIZE);
this._informationButton.x = availableWidth - ITEM_DISPLAY_PADDING_RIGHT - INFORMATION_BUTTON_SIZE;
this._informationButton.y = ITEM_DISPLAY_HEIGHT / 2 - INFORMATION_BUTTON_SIZE / 2;
this._informationButton.reactive = true;
this._informationButton = new Button.iconButton(this.actor, INFORMATION_BUTTON_SIZE, infoIcon);
this._informationButton.actor.x = availableWidth - ITEM_DISPLAY_PADDING_RIGHT - INFORMATION_BUTTON_SIZE;
this._informationButton.actor.y = ITEM_DISPLAY_HEIGHT / 2 - INFORMATION_BUTTON_SIZE / 2;
// Connecting to the button-press-event for the information button ensures that the actor,
// which is a draggable actor, does not get the button-press-event and doesn't initiate
// the dragging, which then prevents us from getting the button-release-event for the button.
this._informationButton.connect('button-press-event',
this._informationButton.actor.connect('button-press-event',
Lang.bind(this,
function() {
return true;
}));
this._informationButton.connect('button-release-event',
this._informationButton.actor.connect('button-release-event',
Lang.bind(this,
function() {
// Selects the item by highlighting it and displaying its details
this.emit('select');
return true;
}));
this._informationButton.hide();
this.actor.add_actor(this._informationButton);
this._informationButton.lower_bottom();
this.actor.add_actor(this._informationButton.actor);
this._informationButton.actor.lower_bottom();
this._name = null;
this._description = null;
@ -118,9 +116,6 @@ GenericDisplayItem.prototype = {
this._previewIcon = null;
this.dragActor = null;
this.actor.connect('enter-event', Lang.bind(this, this._onEnter));
this.actor.connect('leave-event', Lang.bind(this, this._onLeave));
},
//// Draggable object interface ////
@ -162,10 +157,14 @@ GenericDisplayItem.prototype = {
// if isSelected is true, removes the highlighting otherwise.
markSelected: function(isSelected) {
let color;
if (isSelected)
if (isSelected) {
color = ITEM_DISPLAY_SELECTED_BACKGROUND_COLOR;
else
this._informationButton.forceShow(true);
}
else {
color = ITEM_DISPLAY_BACKGROUND_COLOR;
this._informationButton.forceShow(false);
}
this._bg.background_color = color;
},
@ -308,21 +307,11 @@ GenericDisplayItem.prototype = {
//// Private methods ////
// Performs actions on mouse enter event for the item. Currently, shows the information button for the item.
_onEnter: function(actor, event) {
this._informationButton.show();
},
// Performs actions on mouse leave event for the item. Currently, hides the information button for the item.
_onLeave: function(actor, event) {
this._informationButton.hide();
},
// Hides the information button once the item starts being dragged.
_onDragBegin : function (draggable, time) {
// For some reason, we are not getting leave-event signal when we are dragging an item,
// so we should remove the link manually.
this._informationButton.hide();
this._informationButton.actor.hide();
}
};