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fix(app-shell): enhancement to be resizable app-shell (#2152)
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@vicalcantFrontEnd
vicalcantFrontEnd authored May 13, 2024
1 parent 334dbaf commit 1e4d9fc
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Showing 2 changed files with 160 additions and 11 deletions.
39 changes: 30 additions & 9 deletions libs/components/src/app-shell/app-shell.scss
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Original file line number Diff line number Diff line change
Expand Up @@ -68,7 +68,6 @@
height: 100vh;
grid-area: main;
overflow: auto;
transition: margin 200ms ease-in-out;

.main-wrapper {
margin: 0 auto;
Expand Down Expand Up @@ -100,10 +99,6 @@
.cov-drawer--open & {
margin-left: 256px;
}

.cov-help--open & {
margin-right: 320px;
}
}

@media only screen and (max-width: 1600px) {
Expand All @@ -117,11 +112,37 @@
grid-area: help;
position: fixed;
right: 0;
width: 320px;
width: var(--help-width, 320px);
height: 100vh;
overflow-y: auto;
transition-property: width;
transition-duration: 200ms;

.resize-handle {
position: absolute;
left: 0;
width: 10px;
height: 100vh;
cursor: ew-resize;
z-index: 1100;
user-select: none;

&::after {
content: '';
position: absolute;
left: 50%;
top: 0;
width: 2px;
height: 100%;
background-color: var(--mdc-theme-primary);
transform: translateX(-50%);
transition: opacity 0.3s ease;
opacity: 0;
}

&:hover::after,
&.resizing::after {
opacity: 1;
}
}

.cov-help--closed & {
width: 0;
Expand Down Expand Up @@ -152,7 +173,7 @@

.current-section-name {
opacity: 0;
transition: opacity 150ms;
transition: opacity 200ms;

:host([open]) & {
opacity: 1;
Expand Down
132 changes: 130 additions & 2 deletions libs/components/src/app-shell/app-shell.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -31,6 +31,11 @@ export class CovalentAppShell extends DrawerBase {
`,
];

element = document.querySelector('.help');
helpWidth = 0;
private _startX!: number;
private _startWidth!: number;

@queryAssignedElements({ slot: 'navigation' })
navigationListElements!: HTMLElement[];

Expand Down Expand Up @@ -77,8 +82,120 @@ export class CovalentAppShell extends DrawerBase {

constructor() {
super();
this._resize = this._resize.bind(this);
this._stopResize = this._stopResize.bind(this);
this._startResizing = this._startResizing.bind(this);
this._setupEventListeners();
window.addEventListener('DOMContentLoaded', () => {
this.setupHelpPanelListeners();
this.resizeEvent();
const storedWidth = localStorage.getItem('helpWidth');
if (storedWidth) {
this.helpWidth = parseInt(storedWidth, 10);
this.updateHelpPanelWidth();
}
});
}

setupHelpPanelListeners() {
const helpToggle = document.querySelector('.help-item');
const helpClose = document.querySelector('.help-close');

helpToggle?.addEventListener('click', () => {
this.toggleHelpPanel();
});

helpClose?.addEventListener('click', () => {
this.toggleHelpPanel(false);
});
}

toggleHelpPanel(open?: boolean) {
this.helpOpen = open !== undefined ? open : !this.helpOpen;
if (this.helpOpen) {
const storedWidth = localStorage.getItem('helpWidth');
this.helpWidth = storedWidth ? parseInt(storedWidth, 10) : 320;
} else {
this.helpWidth = 0;
}
this.updateHelpPanelWidth();
this.requestUpdate();
}

this.resizeEvent();
private _setupEventListeners() {
window.addEventListener('DOMContentLoaded', () => {
const helpToggle = document.querySelector('.help-item');
const helpClose = document.querySelector('.help-close');

helpToggle?.addEventListener('click', () => {
this.helpOpen = !this.helpOpen;
this.helpWidth = this.helpOpen ? 320 : 0;
this.requestUpdate();
});

helpClose?.addEventListener('click', () => {
this.helpOpen = false;
this.helpWidth = 0;
this.requestUpdate();
});
});
}

override firstUpdated() {
const resizeHandle = this.shadowRoot?.querySelector('.resize-handle');
if (resizeHandle) {
resizeHandle.addEventListener('mousedown', (event) => {
if (event instanceof MouseEvent) {
this._startResizing(event);
}
});

resizeHandle.addEventListener('dblclick', () => {
if (this.helpWidth > 320 || this.helpWidth !== 320) {
this.helpWidth = 320;
localStorage.setItem('helpWidth', '320');
this.updateHelpPanelWidth();
this.requestUpdate();
}
});
}
}

private _startResizing(event: MouseEvent) {
const resizeHandle = this.shadowRoot?.querySelector('.resize-handle');
if (event.target === resizeHandle) {
this._startX = event.clientX;
this._startWidth = this.helpWidth;
document.addEventListener('mousemove', this._resize);
document.addEventListener('mouseup', this._stopResize);
(event.target as HTMLElement).classList.add('resizing');
}
}

private _resize(event: MouseEvent) {
const diff = event.clientX - this._startX;
const windowWidth = window.innerWidth;
const mainMinWidth = 600;
const maxWidthForHelp = Math.max(320, windowWidth - mainMinWidth);
const newWidth = Math.max(
320,
Math.min(maxWidthForHelp, this._startWidth - diff)
);
if (this.helpWidth !== newWidth) {
this.helpWidth = newWidth;
localStorage.setItem('helpWidth', this.helpWidth.toString());
this.updateHelpPanelWidth();
}
event.preventDefault();
}

private _stopResize() {
document.removeEventListener('mousemove', this._resize);
document.removeEventListener('mouseup', this._stopResize);
const resizeHandle = this.shadowRoot?.querySelector('.resize-handle');
if (resizeHandle) {
resizeHandle.classList.remove('resizing');
}
}

private _toggleOpen(forcedOpen = false) {
Expand All @@ -95,6 +212,16 @@ export class CovalentAppShell extends DrawerBase {
this.requestUpdate();
}

private updateHelpPanelWidth() {
const helpPanel = this.shadowRoot?.querySelector('.help') as HTMLElement;
const mainPanel = this.shadowRoot?.querySelector('.main') as HTMLElement;

if (helpPanel && mainPanel) {
helpPanel.style.setProperty('--help-width', `${this.helpWidth}px`);
mainPanel.style.marginRight = `${this.helpWidth}px`;
}
}

private _handleMenuClick() {
this.mdcRoot.dispatchEvent(
new Event('transitionend', { bubbles: true, composed: true })
Expand Down Expand Up @@ -229,7 +356,8 @@ export class CovalentAppShell extends DrawerBase {
${this.renderMain()}
</div>
</div>
<div class="help">
<div class="help" @mousedown="${this._startResizing}">
<div class="resize-handle"></div>
<slot name="help"></slot>
</div>
</div>
Expand Down

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