corrad-bp/components/process-flow/custom/StartNode.vue

<script setup>
import { Handle, Position } from '@vue-flow/core'

// Define props that Vue Flow passes to custom nodes
const props = defineProps([
  'id',           // Node ID
  'type',         // Node type
  'label',        // Node label
  'selected',     // Selection state
  'data'          // Custom data object
])

// Computed for node label with fallback
const nodeLabel = computed(() => {
  return props.label || (props.data && props.data.label) || 'Start'
})

// Handle node click event
const emit = defineEmits(['node-click'])
const onClick = () => {
  emit('node-click', props.id)
}
</script>

<template>
  <div 
    :class="['custom-node', 'node-start', { 'selected': selected }]"
    @click="onClick"
  >
    <!-- Start node only has output handles -->
    <!-- Right handle -->
    <Handle
      type="source"
      :position="Position.Right"
      class="handle-start-output handle-right"
      :id="id + '-right'"
      :style="{ zIndex: 1000 }"
      :isConnectable="true"
      :isValidConnection="() => true"
    />
    
    <!-- Bottom handle -->
    <Handle
      type="source"
      :position="Position.Bottom"
      class="handle-start-output handle-bottom"
      :id="id + '-bottom'"
      :style="{ zIndex: 1000 }"
      :isConnectable="true"
      :isValidConnection="() => true"
    />
    
    <div class="custom-node-content">
      <div class="custom-node-icon">
        <i class="material-icons text-green-600">play_arrow</i>
      </div>
      <div class="custom-node-label" :title="nodeLabel">{{ nodeLabel }}</div>
    </div>
  </div>
</template>

<style scoped>
/* Start node specific styling */
.node-start {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
  background: #e8f5e9;
  border: 1px solid #4CAF50;
  position: relative;
  color: #333;
  font-size: 12px;
  transition: all 0.2s;
}

.node-start.selected {
  border-color: #ff6b6b;
  box-shadow: 0 0 0 2px rgba(255, 107, 107, 0.2);
}

.custom-node-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100%;
  padding: 0;
  position: relative;
  z-index: 2;
}

.custom-node-icon {
  margin: 0;
  display: inline-flex;
  align-items: center;
}

.custom-node-icon .material-icons {
  font-size: 14px;
}

.custom-node-label {
  position: absolute;
  width: 60px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  top: 51px;
  left: 50%;
  transform: translateX(-50%);
  font-size: 10px;
  font-weight: 500;
  text-align: center;
}

/* Handle styles */
.handle-right {
  right: -6px !important;
  top: 50% !important;
  transform: translateY(-50%) !important;
  width: 12px !important;
  height: 12px !important;
  border-radius: 50% !important;
  background: #fff !important;
  border: 2px solid #4CAF50 !important;
  opacity: 0;
  transition: all 0.2s ease;
  cursor: crosshair;
  z-index: 100 !important;
  position: absolute !important;
}

.handle-bottom {
  bottom: -6px !important;
  left: 50% !important;
  transform: translateX(-50%) !important;
  width: 12px !important;
  height: 12px !important;
  border-radius: 50% !important;
  background: #fff !important;
  border: 2px solid #4CAF50 !important;
  opacity: 0;
  transition: all 0.2s ease;
  cursor: crosshair;
  z-index: 100 !important;
  position: absolute !important;
}

/* Show handles on hover and during connection */
.node-start:hover .handle-right,
.node-start:hover .handle-bottom {
  opacity: 1;
}

.handle-right:hover {
  transform: translateY(-50%) scale(1.1);
  background: #4CAF50 !important;
  border-color: #2E7D32 !important;
}

.handle-bottom:hover {
  transform: translateX(-50%) scale(1.1);
  background: #4CAF50 !important;
  border-color: #2E7D32 !important;
}
</style>