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/*
** Zabbix
** Copyright (C) 2001-2022 Zabbix SIA
**
** This program is free software; you can redistribute it and/or modify
** it under the terms of the GNU General Public License as published by
** the Free Software Foundation; either version 2 of the License, or
** (at your option) any later version.
**
** This program is distributed in the hope that it will be useful,
** but WITHOUT ANY WARRANTY; without even the implied warranty of
** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
** GNU General Public License for more details.
**
** You should have received a copy of the GNU General Public License
** along with this program; if not, write to the Free Software
** Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
**/
const ZBX_STYLE_WIDGET_PLACEHOLDER = 'dashboard-widget-placeholder';
const ZBX_STYLE_WIDGET_PLACEHOLDER_BOX = 'dashboard-widget-placeholder-box';
const ZBX_STYLE_WIDGET_PLACEHOLDER_LABEL = 'dashboard-widget-placeholder-label';
const ZBX_STYLE_WIDGET_PLACEHOLDER_RESIZING = 'dashboard-widget-placeholder-resizing';
const ZBX_STYLE_WIDGET_PLACEHOLDER_HIDDEN = 'hidden';
const WIDGET_PLACEHOLDER_STATE_ADD_NEW = 0;
const WIDGET_PLACEHOLDER_STATE_RESIZING = 1;
const WIDGET_PLACEHOLDER_STATE_POSITIONING = 2;
const WIDGET_PLACEHOLDER_EVENT_ADD_NEW_WIDGET = 'widget-placeholder-add-new-widget';
/**
* New widget placeholder class.
*/
class CDashboardWidgetPlaceholder extends CBaseComponent {
/**
* Create new widget placeholder instance.
*
* @param {int} cell_width Dashboard grid cell width in percents.
* @param {int} cell_height Dashboard grid cell height in pixels.
*/
constructor(cell_width, cell_height) {
super(document.createElement('div'));
this._cell_width = cell_width;
this._cell_height = cell_height;
this._target.classList.add(ZBX_STYLE_WIDGET_PLACEHOLDER);
this._placeholder_box = document.createElement('div');
this._placeholder_box.classList.add(ZBX_STYLE_WIDGET_PLACEHOLDER_BOX);
this._placeholder_box_label = document.createElement('div');
this._placeholder_box_label.classList.add(ZBX_STYLE_WIDGET_PLACEHOLDER_LABEL);
this._placeholder_box_label_wrap = document.createElement('span');
this._placeholder_box_label.appendChild(this._placeholder_box_label_wrap);
this._placeholder_box.appendChild(this._placeholder_box_label);
this._target.appendChild(this._placeholder_box);
this.setState(WIDGET_PLACEHOLDER_STATE_ADD_NEW);
}
/**
* Get node of the new widget placeholder.
*
* @returns {HTMLElement}
*/
getNode() {
return this._target;
}
/**
* Set state of the new widget placeholder.
*
* @param {int} state WIDGET_PLACEHOLDER_STATE_* constant.
*
* @returns {CDashboardWidgetPlaceholder}
*/
setState(state) {
this._target.classList.add(ZBX_STYLE_WIDGET_PLACEHOLDER_HIDDEN);
this._target.classList.remove('disabled');
this._placeholder_box.classList.remove(ZBX_STYLE_WIDGET_PLACEHOLDER_RESIZING);
this._placeholder_box_label_wrap.textContent = '';
switch (state) {
case WIDGET_PLACEHOLDER_STATE_ADD_NEW:
const link = document.createElement('a');
link.textContent = t('Add a new widget');
link.href = 'javascript:void(0)';
this._target.addEventListener('click', (e) => {
e.stopImmediatePropagation();
this.fire(WIDGET_PLACEHOLDER_EVENT_ADD_NEW_WIDGET);
});
this._placeholder_box_label_wrap.appendChild(link);
break;
case WIDGET_PLACEHOLDER_STATE_RESIZING:
this._placeholder_box.classList.add(ZBX_STYLE_WIDGET_PLACEHOLDER_RESIZING);
this._placeholder_box_label_wrap.textContent = t('Release to create a widget.');
break;
case WIDGET_PLACEHOLDER_STATE_POSITIONING:
this._placeholder_box_label_wrap.textContent = t('Click and drag to desired size.');
break;
}
return this;
}
/**
* Resize the new widget placeholder. Use to update visibility of the label of the placeholder.
*
* @returns {CDashboardWidgetPlaceholder}
*/
resize() {
if (!this._target.classList.contains(ZBX_STYLE_WIDGET_PLACEHOLDER_HIDDEN)) {
this._placeholder_box_label_wrap.classList.remove(ZBX_STYLE_WIDGET_PLACEHOLDER_HIDDEN);
if (this._placeholder_box_label.scrollHeight > this._placeholder_box_label.clientHeight) {
this._placeholder_box_label_wrap.classList.add(ZBX_STYLE_WIDGET_PLACEHOLDER_HIDDEN);
}
}
return this;
}
/**
* Show new widget placeholder at given position.
*
* @returns {CDashboardWidgetPlaceholder}
*/
showAtPosition({x, y, width, height}) {
this._target.style.position = 'absolute';
this._target.style.left = `${x * this._cell_width}%`;
this._target.style.top = `${y * this._cell_height}px`;
this._target.style.width = `${width * this._cell_width}%`;
this._target.style.height = `${height * this._cell_height}px`;
this._target.classList.remove(ZBX_STYLE_WIDGET_PLACEHOLDER_HIDDEN);
this.resize();
return this;
}
/**
* Show new widget placeholder at the default position.
*
* @returns {CDashboardWidgetPlaceholder}
*/
showAtDefaultPosition() {
this._target.style.position = null;
this._target.style.left = null;
this._target.style.top = null;
this._target.style.width = null;
this._target.style.height = null;
this._target.classList.remove(ZBX_STYLE_WIDGET_PLACEHOLDER_HIDDEN);
this.resize();
return this;
}
/**
* Hide new widget placeholder.
*
* @returns {CDashboardWidgetPlaceholder}
*/
hide() {
this._target.classList.add(ZBX_STYLE_WIDGET_PLACEHOLDER_HIDDEN);
return this;
}
}
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