pxt-core/theme/image-editor/timeline.less

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.image-editor-timeline {
    width: 7rem;
    background-color: var(--editing-tools-bg-color);
    height: 100%;
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.image-editor-timeline-frames {
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
    padding: 0.4rem 0;
}

.image-editor-timeline-frame {
    border: 1px var(--sidebar-icon-inactive-color) solid;
    color: var(--sidebar-icon-inactive-color);

    border-radius: 0.25rem;
    width: 6rem;
    height: 6rem;
    margin: 0 0.4rem;

    transition: border 0.2s, color 0.2s;
    overflow: hidden;
    position: relative;
}

.image-editor-timeline-frame.active {
    cursor: grab;
    border-color: var(--sidebar-icon-active-color);
}

.image-editor-timeline-preview {
    width: 100%;

    /* Don't ask... */
    min-height: 7rem;
    max-height: 7rem;

    background-color: #3d3d3d;
}

.image-editor-timeline-frame:hover {
    color: var(--sidebar-icon-active-color);
    border: 1px var(--sidebar-icon-active-color) solid;
}

.image-editor-timeline-frame.collapsed {
    text-align: center;
    height: 2rem;
    line-height: 2rem;
}

.timeline-frame-outer {
    width: 100%;
    height: 100%;
    display: flex;
}

.timeline-frame-outer.portrait {
    flex-direction: row;
}

.timeline-frame-outer.portrait canvas {
    height: 100%;
}

.timeline-frame-outer.landscape {
    flex-direction: column;
}

.timeline-frame-outer.landscape canvas {
    width: 100%;
}

.timeline-frame-spacer {
    flex-grow: 1;
}

.timeline-frame-outer canvas {
    image-rendering: optimizeSpeed;
    image-rendering: -moz-crisp-edges;
    image-rendering: -webkit-optimize-contrast;
    image-rendering: optimize-contrast;
    image-rendering: pixelated;
    -ms-interpolation-mode: nearest-neighbor;
}

.image-editor-timeline-frames-outer {
    flex-grow: 1;
    overflow: hidden;
    position: relative;
}

.image-editor-timeline-frames.scrolling {
    cursor: grabbing;
}

.image-editor-timeline-framess.scrolling .image-editor-timeline-frame {
    cursor: grabbing;
}

.timeline-frame-actions {
    display: flex;
    flex-direction: row;
    background-color: #333333;
    border-top: var(--sidebar-icon-active-color) 1px solid;
    position: absolute;
    bottom: 0;
    width: 100%;
    height: 2rem;
}


.timeline-frame-actions .image-editor-button {
    /* color: #000000; */
    flex-grow: 1;
    margin: 0;
}

.image-editor-timeline-frame.dragging {
    position: absolute;
    left: 0;
    top: -9999px;
    background-color: #3d3d3d;
}

.image-editor-timeline-frame.drop-marker {
    border: 1px var(--sidebar-icon-active-color) dotted;
    background-color: #aeaeae;
}

.common-button.image-editor-button.add-frame-button {
    height: 2rem;
    width: 6rem;
    margin: 0 0.4rem;

    border: 1px solid var(--sidebar-icon-inactive-color);
    transition: color 0.1s, border-color 0.1s;

    &:hover {
        border-color: var(--sidebar-icon-active-color);
        filter: none;
    }
}

/* .timeline-frame-actions */


/* CSS fixes for Edge rendering issue with position: relative */
.edge {
    .image-editor-timeline-frame,
    .image-editor-timeline-frames-outer,
    .timeline-frame-actions {
        position: static;
    }

    .timeline-frame-outer canvas {
        height: 6rem;
    }

    .timeline-frame-actions {
        margin-top: -2rem;
    }
}