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-rw-r--r--src/components/TimeLine.vue192
1 files changed, 102 insertions, 90 deletions
diff --git a/src/components/TimeLine.vue b/src/components/TimeLine.vue
index f6f08c3..defa1e4 100644
--- a/src/components/TimeLine.vue
+++ b/src/components/TimeLine.vue
@@ -5,20 +5,22 @@
@pointercancel.prevent="onPointerUp" @pointerout.prevent="onPointerUp" @pointerleave.prevent="onPointerUp"
ref="rootRef">
<svg :viewBox="`0 0 ${width} ${height}`">
- <line stroke="yellow" stroke-width="2px" x1="50%" y1="0%" x2="50%" y2="100%"/>
+ <line stroke="yellow" stroke-width="2px"
+ :x1="vert ? '50%' : 0" :y1="vert ? 0 : '50%'"
+ :x2="vert ? '50%' : '100%'" :y2="vert ? '100%' : '50%'"/>
<template v-for="n in ticks" :key="n">
- <line v-if="n == minDate || n == maxDate"
- :x1="-4" y1="0"
- :x2="4" y2="0"
- stroke="yellow" stroke-width="8px" :style="tickStyles(n)" class="animate-fadein"/>
+ <line v-if="n == MIN_DATE || n == MAX_DATE"
+ :x1="vert ? -END_TICK_SZ : 0" :y1="vert ? 0 : -END_TICK_SZ"
+ :x2="vert ? END_TICK_SZ : 0" :y2="vert ? 0 : END_TICK_SZ"
+ stroke="yellow" :stroke-width="`${END_TICK_SZ * 2}px`" :style="tickStyles(n)" class="animate-fadein"/>
<line v-else
- :x1="-8" y1="0"
- :x2="8" y2="0"
+ :x1="vert ? -TICK_LEN : 0" :y1="vert ? 0 : -TICK_LEN"
+ :x2="vert ? TICK_LEN : 0" :y2="vert ? 0 : TICK_LEN"
stroke="yellow" stroke-width="1px" :style="tickStyles(n)" class="animate-fadein"/>
</template>
<text fill="#606060" v-for="n in ticks" :key="n"
- :x="width/2 + 20" y="0"
- text-anchor="start" dominant-baseline="middle" :style="tickLabelStyles(n)" class="text-sm animate-fadein">
+ x="0" y="0" :text-anchor="vert ? 'start' : 'middle'" dominant-baseline="middle"
+ :style="tickLabelStyles(n)" class="text-sm animate-fadein">
{{n}}
</text>
</svg>
@@ -26,7 +28,7 @@
</template>
<script setup lang="ts">
-import {ref, onMounted, nextTick} from 'vue';
+import {ref, onMounted, computed, nextTick} from 'vue';
// Refs
const rootRef = ref(null as HTMLElement | null);
@@ -35,79 +37,82 @@ const rootRef = ref(null as HTMLElement | null);
const props = defineProps({
width: {type: Number, required: true},
height: {type: Number, required: true},
+ vert: {type: Boolean, default: false},
});
// Vars
-const minDate = -1000; // Lowest date that gets marked
-const maxDate = 1000;
+const MIN_DATE = -1000; // Lowest date that gets marked
+const MAX_DATE = 1000;
const startDate = ref(0); // Lowest date on displayed timeline
const endDate = ref(0);
-const scales = [200, 50, 10, 1, 0.2]; // The timeline get divided into units of scales[0], then scales[1], etc
-let scaleIdx = 0; // Index of current scale in 'scales'
+const SCALES = [200, 50, 10, 1, 0.2]; // The timeline get divided into units of SCALES[0], then SCALES[1], etc
+let scaleIdx = 0; // Index of current scale in SCALES
const ticks = ref(null); // Holds date value for each tick
const SCROLL_SHIFT_CHG = 0.2; // Proportion of timeline length to shift by upon scroll
const ZOOM_RATIO = 1.5; // When zooming out, the timeline length gets multiplied by this ratio
const MIN_TICK_SEP = 30; // Smallest px separation between ticks
-const MIN_LAST_TICKS = 3; // When at smallest scale, don't zoom further if less than this many ticks would result
-let PAD_UNITS = 0.5; // Amount of extra scale units to add before/after min/max date
+const MIN_LAST_TICKS = 3; // When at smallest scale, don't zoom further into less than this many ticks
+const padUnits = computed(() => props.vert ? 0.5 : 1); // Amount of extra scale units to add before/after min/max date
+const TICK_LEN = 8;
+const END_TICK_SZ = 4; // Size for MIN_DATE/MAX_DATE ticks
+const availLen = computed(() => props.vert ? props.height : props.width);
// For initialisation
function initTicks(): number[] {
// Find smallest usable scale
- for (let i = 0; i < scales.length; i++){
- let len = maxDate - minDate + (PAD_UNITS * scales[i]) * 2;
- if (props.height * (scales[i] / len) > MIN_TICK_SEP){
+ for (let i = 0; i < SCALES.length; i++){
+ let dateLen = MAX_DATE - MIN_DATE + (padUnits.value * SCALES[i]) * 2;
+ if (availLen.value * (SCALES[i] / dateLen) > MIN_TICK_SEP){
scaleIdx = i;
} else {
break;
}
}
// Set start/end date
- let extraPad = PAD_UNITS * scales[scaleIdx];
- startDate.value = minDate - extraPad;
- endDate.value = maxDate + extraPad;
+ let extraPad = padUnits.value * SCALES[scaleIdx];
+ startDate.value = MIN_DATE - extraPad;
+ endDate.value = MAX_DATE + extraPad;
// Get tick values
let newTicks = [];
- let next = minDate;
- while (next <= maxDate){
+ let next = MIN_DATE;
+ while (next <= MAX_DATE){
newTicks.push(next);
- next += scales[scaleIdx];
+ next += SCALES[scaleIdx];
}
ticks.value = newTicks;
- //
updateTicks();
}
onMounted(() => nextTick(initTicks));
-// Adds extra ticks outside the visible area (which can transition in upon shift/zoom),
+// Adds extra ticks outside the visible area (which might transition in upon shift/zoom),
// and adds/removes ticks upon a scale change
function updateTicks(){
- let len = endDate.value - startDate.value;
- let shiftChg = len * SCROLL_SHIFT_CHG;
- let scaleChg = len * (ZOOM_RATIO - 1) / 2;
- let scale = scales[scaleIdx];
+ let dateLen = endDate.value - startDate.value;
+ let shiftChg = dateLen * SCROLL_SHIFT_CHG;
+ let scaleChg = dateLen * (ZOOM_RATIO - 1) / 2;
+ let scale = SCALES[scaleIdx];
// Get ticks in new range, and add hidden ticks that might transition in on a shift action
let tempTicks = [];
- let next = Math.ceil((Math.max(minDate, startDate.value - shiftChg) - minDate) / scale);
- let last = Math.floor((Math.min(maxDate, endDate.value + shiftChg) - minDate) / scale);
+ let next = Math.ceil((Math.max(MIN_DATE, startDate.value - shiftChg) - MIN_DATE) / scale);
+ let last = Math.floor((Math.min(MAX_DATE, endDate.value + shiftChg) - MIN_DATE) / scale);
while (next <= last){
- tempTicks.push(minDate + next * scale);
+ tempTicks.push(MIN_DATE + next * scale);
next++;
}
// Get hidden ticks that might transition in on a zoom action
let tempTicks2 = [];
let tempTicks3 = [];
if (scaleIdx > 0){
- scale = scales[scaleIdx-1];
- let first = Math.ceil((Math.max(minDate, startDate.value - scaleChg) - minDate) / scale);
- while ((minDate + first * scale) < tempTicks[0]){
- tempTicks2.push(minDate + first * scale);
+ scale = SCALES[scaleIdx-1];
+ let first = Math.ceil((Math.max(MIN_DATE, startDate.value - scaleChg) - MIN_DATE) / scale);
+ while ((MIN_DATE + first * scale) < tempTicks[0]){
+ tempTicks2.push(MIN_DATE + first * scale);
first++;
}
- let last = Math.floor((Math.min(maxDate, endDate.value + scaleChg) - minDate) / scale);
- let next = Math.floor((tempTicks[tempTicks.length - 1] - minDate) / scale) + 1;
+ let last = Math.floor((Math.min(MAX_DATE, endDate.value + scaleChg) - MIN_DATE) / scale);
+ let next = Math.floor((tempTicks[tempTicks.length - 1] - MIN_DATE) / scale) + 1;
while (next <= last){
- tempTicks3.push(minDate + next * scale);
+ tempTicks3.push(MIN_DATE + next * scale);
next++;
}
}
@@ -116,14 +121,14 @@ function updateTicks(){
}
// Performs a shift action
function shiftTimeline(n: number){
- let len = endDate.value - startDate.value;
- let extraPad = PAD_UNITS * scales[scaleIdx]
- let paddedMinDate = minDate - extraPad;
- let paddedMaxDate = maxDate + extraPad;
- let chg = len * n;
+ let dateLen = endDate.value - startDate.value;
+ let extraPad = padUnits.value * SCALES[scaleIdx]
+ let paddedMinDate = MIN_DATE - extraPad;
+ let paddedMaxDate = MAX_DATE + extraPad;
+ let chg = dateLen * n;
if (startDate.value + chg < paddedMinDate){
if (startDate.value == paddedMinDate){
- console.log('Reached minDate limit')
+ console.log('Reached MIN_DATE limit')
return;
}
chg = paddedMinDate - startDate.value;
@@ -131,7 +136,7 @@ function shiftTimeline(n: number){
endDate.value += chg;
} else if (endDate.value + chg > paddedMaxDate){
if (endDate.value == paddedMaxDate){
- console.log('Reached maxDate limit')
+ console.log('Reached MAX_DATE limit')
return;
}
chg = paddedMaxDate - endDate.value;
@@ -145,25 +150,26 @@ function shiftTimeline(n: number){
}
// Performs a zoom action
function zoomTimeline(frac: number){
- let oldLen = endDate.value - startDate.value;
- let newLen = oldLen * frac;
- let extraPad = PAD_UNITS * scales[scaleIdx]
- let paddedMinDate = minDate - extraPad;
- let paddedMaxDate = maxDate + extraPad;
+ let oldDateLen = endDate.value - startDate.value;
+ let newDateLen = oldDateLen * frac;
+ let extraPad = padUnits.value * SCALES[scaleIdx]
+ let paddedMinDate = MIN_DATE - extraPad;
+ let paddedMaxDate = MAX_DATE + extraPad;
// Get new bounds
let newStart: number;
let newEnd: number;
- if (pointerY == null){
- let lenChg = newLen - oldLen
+ let ptrOffset = props.vert ? pointerY : pointerX;
+ if (ptrOffset == null){
+ let lenChg = newDateLen - oldDateLen
newStart = startDate.value - lenChg / 2;
newEnd = endDate.value + lenChg / 2;
} else {
- let y = 0; // Element-relative pointerY
+ let innerOffset = 0; // Element-relative ptrOffset
if (rootRef.value != null){ // Can become null during dev-server hot-reload for some reason
let rect = rootRef.value.getBoundingClientRect();
- y = pointerY - rect.top;
+ innerOffset = ptrOffset - rect.top;
}
- let zoomCenter = startDate.value + (y / props.height) * oldLen;
+ let zoomCenter = startDate.value + (innerOffset / availLen.value) * oldDateLen;
newStart = zoomCenter - (zoomCenter - startDate.value) * frac;
newEnd = zoomCenter + (endDate.value - zoomCenter) * frac;
}
@@ -191,8 +197,8 @@ function zoomTimeline(frac: number){
}
}
// Possibly change the scale
- newLen = newEnd - newStart;
- let tickDiff = props.height * (scales[scaleIdx] / newLen);
+ newDateLen = newEnd - newStart;
+ let tickDiff = availLen.value * (SCALES[scaleIdx] / newDateLen);
if (tickDiff < MIN_TICK_SEP){
if (scaleIdx == 0){
console.log('INFO: Reached zoom out limit');
@@ -201,12 +207,12 @@ function zoomTimeline(frac: number){
scaleIdx--;
}
} else {
- if (scaleIdx < scales.length - 1){
- if (tickDiff > MIN_TICK_SEP * scales[scaleIdx] / scales[scaleIdx + 1]){
+ if (scaleIdx < SCALES.length - 1){
+ if (tickDiff > MIN_TICK_SEP * SCALES[scaleIdx] / SCALES[scaleIdx + 1]){
scaleIdx++;
}
} else {
- if (newLen / tickDiff < MIN_LAST_TICKS){
+ if (newDateLen / tickDiff < MIN_LAST_TICKS){
console.log('INFO: Reached zoom in limit');
return;
}
@@ -222,8 +228,8 @@ function zoomTimeline(frac: number){
let pointerX = null; // Stores pointer position (used for pointer-centered zooming)
let pointerY = null;
const ptrEvtCache = []; // Holds last captured PointerEvent for each pointerId (used for pinch-zoom)
-let lastPinchY = -1; // Holds last y-distance between two pointers that are down
-let dragDiffY = 0; // Holds accumlated change in pointer's y-coordinate while dragging
+let lastPinchDiff = -1; // Holds last x/y distance between two pointers that are down
+let dragDiff = 0; // Holds accumlated change in pointer's x/y coordinate while dragging
let dragHandler = 0; // Set by a setTimeout() to a handler for pointer dragging
function onPointerDown(evt: PointerEvent){
ptrEvtCache.push(evt);
@@ -238,29 +244,31 @@ function onPointerMove(evt: PointerEvent){
//
if (ptrEvtCache.length == 1){
// Handle pointer dragging
- dragDiffY += evt.clientY - pointerY;
+ dragDiff += props.vert ? evt.clientY - pointerY : evt.clientX - pointerX;
if (dragHandler == 0){
dragHandler = setTimeout(() => {
- if (Math.abs(dragDiffY) > 2){
- shiftTimeline(-dragDiffY / props.height);
- dragDiffY = 0;
+ if (Math.abs(dragDiff) > 2){
+ shiftTimeline(-dragDiff / availLen.value);
+ dragDiff = 0;
}
dragHandler = 0;
}, 50);
}
} else if (ptrEvtCache.length == 2){
// Handle pinch-zoom
- const pinchY = Math.abs(ptrEvtCache[0].clientY - ptrEvtCache[1].clientY);
- if (lastPinchY > 0){
- if (pinchY > lastPinchY){
+ const pinchDiff = Math.abs(props.vert ?
+ ptrEvtCache[0].clientY - ptrEvtCache[1].clientY :
+ ptrEvtCache[0].clientX - ptrEvtCache[1].clientX);
+ if (lastPinchDiff > 0){
+ if (pinchDiff > lastPinchDiff){
console.log('Pinching out, zooming in');
//TODO: implement pinch-zooming
- } else if (pinchY < lastPinchY){
+ } else if (pinchDiff < lastPinchDiff){
console.log('Pinching in, zooming out');
//TODO: implement pinch-zooming
}
}
- lastPinchY = pinchY;
+ lastPinchDiff = pinchDiff;
}
// Update stored cursor position
pointerX = evt.clientX;
@@ -272,16 +280,16 @@ function onPointerUp(evt: PointerEvent){
ptrEvtCache.splice(index, 1);
// Reset other vars
if (ptrEvtCache.length < 2){
- lastPinchY = -1;
+ lastPinchDiff = -1;
}
- dragDiffY = 0;
+ dragDiff = 0;
}
function onWheel(evt: WheelEvent){
- if (evt.deltaY > 0){
- shiftTimeline(SCROLL_SHIFT_CHG);
- } else {
- shiftTimeline(-SCROLL_SHIFT_CHG);
+ let shiftDir = evt.deltaY > 0 ? 1 : -1;
+ if (!props.vert){
+ shiftDir *= -1;
}
+ shiftTimeline(shiftDir * SCROLL_SHIFT_CHG);
}
function onShiftWheel(evt: WheelEvent){
if (evt.deltaY > 0){
@@ -293,28 +301,32 @@ function onShiftWheel(evt: WheelEvent){
// Styles
function tickStyles(tick: number){
- let y = (tick - startDate.value) / (endDate.value - startDate.value) * props.height;
- let scaleX = 1;
- if (scaleIdx > 0 && tick % scales[scaleIdx-1] == 0){ // If the tick exists on the scale directly above this one
- scaleX = 2;
+ let offset = (tick - startDate.value) / (endDate.value - startDate.value) * availLen.value;
+ let scale = 1;
+ if (scaleIdx > 0 && tick % SCALES[scaleIdx-1] == 0){ // If the tick exists on the scale directly above this one
+ scale = 2;
}
return {
- transform: `translate(${props.width/2}px, ${y}px) scale(${scaleX})`,
+ transform: props.vert ?
+ `translate(${props.width/2}px, ${offset}px) scale(${scale})` :
+ `translate(${offset}px, ${props.height/2}px) scale(${scale})`,
transitionProperty: 'transform, opacity',
transitionDuration: '300ms',
transitionTimingFunction: 'ease-out',
- opacity: (y >= 0 && y <= props.height) ? 1 : 0,
+ opacity: (offset >= 0 && offset <= availLen.value) ? 1 : 0,
}
}
function tickLabelStyles(tick: number){
- let y = (tick - startDate.value) / (endDate.value - startDate.value) * props.height;
- let fontHeight = 10;
+ let offset = (tick - startDate.value) / (endDate.value - startDate.value) * availLen.value;
+ let labelSz = props.vert ? 10 : 30;
return {
- transform: `translate(0, ${y}px)`,
+ transform: props.vert ?
+ `translate(${props.width / 2 + 20}px, ${offset}px)` :
+ `translate(${offset}px, ${props.height / 2 + 30}px)`,
transitionProperty: 'transform, opacity',
transitionDuration: '300ms',
transitionTimingFunction: 'ease-out',
- opacity: (y >= fontHeight && y <= props.height - fontHeight) ? 1 : 0,
+ opacity: (offset >= labelSz && offset <= availLen.value - labelSz) ? 1 : 0,
}
}
</script>
generated by cgit v1.2.3 (git 2.39.1) at 2026-04-25 16:33:18 +0000