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// Copyright 2016 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
/**
* @fileoverview
* 'settings-display-overscan-dialog' is the dialog for display overscan
* adjustments.
*/
Polymer({
is: 'settings-display-overscan-dialog',
properties: {
/** Id of the display for which overscan is being applied (or empty). */
displayId: {
type: String,
notify: true,
observer: 'displayIdChanged_',
},
/** Set to true once changes are saved to avoid a reset/cancel on close. */
committed_: Boolean,
},
/**
* Keyboard event handler for overscan adjustments.
* @type {?function(!Event)}
* @private
*/
keyHandler_: null,
open: function() {
this.keyHandler_ = this.handleKeyEvent_.bind(this);
// We need to attach the event listener to |window|, not |this| so that
// changing focus does not prevent key events from occurring.
window.addEventListener('keydown', this.keyHandler_);
this.committed_ = false;
this.$.dialog.showModal();
// Don't focus 'reset' by default. 'Tab' will focus 'OK'.
this.$$('#reset').blur();
},
close: function() {
window.removeEventListener('keydown', this.keyHandler_);
this.displayId = ''; // Will trigger displayIdChanged_.
if (this.$.dialog.open) {
this.$.dialog.close();
}
},
/** @private */
displayIdChanged_: function(newValue, oldValue) {
if (oldValue && !this.committed_) {
settings.display.systemDisplayApi.overscanCalibrationReset(oldValue);
settings.display.systemDisplayApi.overscanCalibrationComplete(oldValue);
}
if (!newValue) {
return;
}
this.committed_ = false;
settings.display.systemDisplayApi.overscanCalibrationStart(newValue);
},
/** @private */
onResetTap_: function() {
settings.display.systemDisplayApi.overscanCalibrationReset(this.displayId);
},
/** @private */
onSaveTap_: function() {
settings.display.systemDisplayApi.overscanCalibrationComplete(
this.displayId);
this.committed_ = true;
this.close();
},
/**
* @param {!Event} event
* @private
*/
handleKeyEvent_: function(event) {
if (event.altKey || event.ctrlKey || event.metaKey) {
return;
}
switch (event.keyCode) {
case 37: // left arrow
if (event.shiftKey) {
this.move_(-1, 0);
} else {
this.resize_(1, 0);
}
break;
case 38: // up arrow
if (event.shiftKey) {
this.move_(0, -1);
} else {
this.resize_(0, -1);
}
break;
case 39: // right arrow
if (event.shiftKey) {
this.move_(1, 0);
} else {
this.resize_(-1, 0);
}
break;
case 40: // down arrow
if (event.shiftKey) {
this.move_(0, 1);
} else {
this.resize_(0, 1);
}
break;
default:
// Allow unhandled key events to propagate.
return;
}
event.preventDefault();
},
/**
* @param {number} x
* @param {number} y
* @private
*/
move_: function(x, y) {
/** @type {!chrome.system.display.Insets} */ const delta = {
left: x,
top: y,
right: x ? -x : 0, // negating 0 will produce a double.
bottom: y ? -y : 0,
};
settings.display.systemDisplayApi.overscanCalibrationAdjust(
this.displayId, delta);
},
/**
* @param {number} x
* @param {number} y
* @private
*/
resize_: function(x, y) {
/** @type {!chrome.system.display.Insets} */ const delta = {
left: x,
top: y,
right: x,
bottom: y,
};
settings.display.systemDisplayApi.overscanCalibrationAdjust(
this.displayId, delta);
}
});
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