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<!--
@license
Copyright (c) 2015 The Polymer Project Authors. All rights reserved.
This code may only be used under the BSD style license found at http://polymer.github.io/LICENSE.txt
The complete set of authors may be found at http://polymer.github.io/AUTHORS.txt
The complete set of contributors may be found at http://polymer.github.io/CONTRIBUTORS.txt
Code distributed by Google as part of the polymer project is also
subject to an additional IP rights grant found at http://polymer.github.io/PATENTS.txt
-->
<link rel="import" href="../polymer/polymer.html">
<link rel="import" href="../iron-overlay-behavior/iron-overlay-behavior.html">
<script>
/**
Use `Polymer.PaperDialogBehavior` and `paper-dialog-shared-styles.html` to implement a Material Design
dialog.
For example, if `<paper-dialog-impl>` implements this behavior:
<paper-dialog-impl>
<h2>Header</h2>
<div>Dialog body</div>
<div class="buttons">
<paper-button dialog-dismiss>Cancel</paper-button>
<paper-button dialog-confirm>Accept</paper-button>
</div>
</paper-dialog-impl>
`paper-dialog-shared-styles.html` provide styles for a header, content area, and an action area for buttons.
Use the `<h2>` tag for the header and the `buttons` class for the action area. You can use the
`paper-dialog-scrollable` element (in its own repository) if you need a scrolling content area.
Use the `dialog-dismiss` and `dialog-confirm` attributes on interactive controls to close the
dialog. If the user dismisses the dialog with `dialog-confirm`, the `closingReason` will update
to include `confirmed: true`.
### Accessibility
This element has `role="dialog"` by default. Depending on the context, it may be more appropriate
to override this attribute with `role="alertdialog"`.
If `modal` is set, the element will prevent the focus from exiting the element.
It will also ensure that focus remains in the dialog.
@hero hero.svg
@demo demo/index.html
@polymerBehavior Polymer.PaperDialogBehavior
*/
Polymer.PaperDialogBehaviorImpl = {
hostAttributes: {
'role': 'dialog',
'tabindex': '-1'
},
properties: {
/**
* If `modal` is true, this implies `no-cancel-on-outside-click`, `no-cancel-on-esc-key` and `with-backdrop`.
*/
modal: {
type: Boolean,
value: false
}
},
observers: [
'_modalChanged(modal, _readied)'
],
listeners: {
'tap': '_onDialogClick'
},
ready: function () {
// Only now these properties can be read.
this.__prevNoCancelOnOutsideClick = this.noCancelOnOutsideClick;
this.__prevNoCancelOnEscKey = this.noCancelOnEscKey;
this.__prevWithBackdrop = this.withBackdrop;
},
_modalChanged: function(modal, readied) {
// modal implies noCancelOnOutsideClick, noCancelOnEscKey and withBackdrop.
// We need to wait for the element to be ready before we can read the
// properties values.
if (!readied) {
return;
}
if (modal) {
this.__prevNoCancelOnOutsideClick = this.noCancelOnOutsideClick;
this.__prevNoCancelOnEscKey = this.noCancelOnEscKey;
this.__prevWithBackdrop = this.withBackdrop;
this.noCancelOnOutsideClick = true;
this.noCancelOnEscKey = true;
this.withBackdrop = true;
} else {
// If the value was changed to false, let it false.
this.noCancelOnOutsideClick = this.noCancelOnOutsideClick &&
this.__prevNoCancelOnOutsideClick;
this.noCancelOnEscKey = this.noCancelOnEscKey &&
this.__prevNoCancelOnEscKey;
this.withBackdrop = this.withBackdrop && this.__prevWithBackdrop;
}
},
_updateClosingReasonConfirmed: function(confirmed) {
this.closingReason = this.closingReason || {};
this.closingReason.confirmed = confirmed;
},
/**
* Will dismiss the dialog if user clicked on an element with dialog-dismiss
* or dialog-confirm attribute.
*/
_onDialogClick: function(event) {
// Search for the element with dialog-confirm or dialog-dismiss,
// from the root target until this (excluded).
var path = Polymer.dom(event).path;
for (var i = 0; i < path.indexOf(this); i++) {
var target = path[i];
if (target.hasAttribute && (target.hasAttribute('dialog-dismiss') || target.hasAttribute('dialog-confirm'))) {
this._updateClosingReasonConfirmed(target.hasAttribute('dialog-confirm'));
this.close();
event.stopPropagation();
break;
}
}
}
};
/** @polymerBehavior */
Polymer.PaperDialogBehavior = [Polymer.IronOverlayBehavior, Polymer.PaperDialogBehaviorImpl];
</script>
|
