update version

package.json

@@ -1,6 +1,6 @@
 {
   "name": "sqliteviz",
-  "version": "0.0.1",
+  "version": "0.3.0",
   "private": true,
   "scripts": {
     "serve": "vue-cli-service serve",
@@ -12,9 +12,9 @@
     "codemirror": "^5.57.0",
     "core-js": "^3.6.5",
     "nanoid": "^3.1.12",
-    "plotly.js": "^1.54.6",
+    "plotly.js": "^1.57.1",
     "react": "^16.13.1",
-    "react-chart-editor": "^0.41.7",
+    "react-chart-editor": "^0.42.0",
     "react-dom": "^16.13.1",
     "sql.js": "^1.3.0",
     "sqlite-parser": "^1.0.1",

src/assets/styles/variables.css

@@ -11,6 +11,7 @@
   --color-blue-dark: #0D76BF;
   --color-blue-dark-2: #2A3F5F;
   --color-red: #EF553B;
+  --color-yellow: #FBEFCB;
 
 
 
@@ -18,6 +19,7 @@
   --color-bg-light-2: var(--color-gray-light-2);
   --color-bg-light-3: var(--color-gray-light-5);
   --color-bg-dark: var(--color-gray-dark);
+  --color-bg-warning: var(--color-yellow);
   --color-accent: var(--color-blue-medium);
   --color-accent-shade: var(--color-blue-dark);
   --color-border-light: var(--color-gray-light-2);

src/components/Chart.vue

@@ -0,0 +1,131 @@
+<template>
+<div class="chart-container">
+  <div class="chart-worning" v-show="!sqlResult && visible">
+    There is no data to build a chart. Run your sql query and make sure the result is not empty.
+  </div>
+  <PlotlyEditor
+    v-show="visible"
+    :data="state.data"
+    :layout="state.layout"
+    :frames="state.frames"
+    :config="{ editable: true, displaylogo: false }"
+    :dataSources="dataSources"
+    :dataSourceOptions="dataSourceOptions"
+    :plotly="plotly"
+    @onUpdate="update"
+    :useResizeHandler="true"
+    :debug="true"
+    :advancedTraceTypeSelector="true"
+    class="chart"
+    :style="{ height: !sqlResult ? 'calc(100% - 40px)' : '100%' }"
+  />
+</div>
+</template>
+
+<script>
+import plotly from 'plotly.js/dist/plotly'
+import 'react-chart-editor/lib/react-chart-editor.min.css'
+
+import PlotlyEditor from 'react-chart-editor'
+import dereference from 'react-chart-editor/lib/lib/dereference'
+
+export default {
+  name: 'Chart',
+  props: ['sqlResult', 'initChart', 'visible'],
+  components: {
+    PlotlyEditor
+  },
+  data () {
+    return {
+      plotly: plotly,
+      state: this.initChart || {
+        data: [],
+        layout: {},
+        frames: []
+      }
+    }
+  },
+  computed: {
+    dataSources () {
+      if (!this.sqlResult) {
+        return {}
+      }
+      const dataSorces = {}
+      const matrix = this.sqlResult.values
+      const [row] = matrix
+      const transposedMatrix = row.map((value, column) => matrix.map(row => row[column]))
+      this.sqlResult.columns.forEach((column, index) => {
+        dataSorces[column] = transposedMatrix[index]
+      })
+      return dataSorces
+    },
+    dataSourceOptions () {
+      return Object.keys(this.dataSources).map(name => ({
+        value: name,
+        label: name
+      }))
+    }
+  },
+  watch: {
+    dataSources () {
+      // we need to update state.data in order to update the graph
+      // https://github.com/plotly/react-chart-editor/issues/948
+      dereference(this.state.data, this.dataSources)
+    }
+  },
+  methods: {
+    update (data, layout, frames) {
+      this.state = { data, layout, frames }
+      this.$emit('update')
+    },
+    getChartSatateForSave () {
+      // we don't need to save the data, only settings
+      // so we modify state.data using dereference
+      const stateCopy = JSON.parse(JSON.stringify(this.state))
+      const emptySources = {}
+      for (const key in this.dataSources) {
+        emptySources[key] = []
+      }
+      dereference(stateCopy.data, emptySources)
+      return stateCopy
+    }
+  }
+}
+</script>
+<style scoped>
+.chart-container {
+  height: calc(100% - 89px);
+}
+.chart-worning {
+  background-color: var(--color-bg-warning);
+  height: 40px;
+  line-height: 40px;
+  color: var(--color-text-base);
+  font-size: 13px;
+  padding: 0 24px;
+}
+.chart {
+  border-top: 1px solid var(--color-border);
+}
+
+>>> .editor_controls .sidebar__item:before {
+  width: 0;
+}
+
+>>> .sidebar {
+  width: 120px;
+  min-width: 120px;
+  max-width: 120px;
+}
+
+>>> .editor_controls__wrapper>.panel,
+>>> .editor_controls .panel__empty {
+  width: 315px;
+}
+>>> .editor_controls .sidebar__group__title {
+  padding-left: 10px;
+}
+>>> .editor_controls .sidebar__item {
+  padding-left: 32px;
+}
+</style>

src/components/MainMenu.vue

@@ -8,7 +8,7 @@
       <button
         v-if="$store.state.tabs.length > 0"
         class="primary"
-        :disabled="!$store.state.currentTab.isUnsaved"
+        :disabled="$store.state.currentTab && !$store.state.currentTab.isUnsaved"
         @click="saveQuery"
       >
         Save
@@ -23,6 +23,9 @@ import { nanoid } from 'nanoid'
 
 export default {
   name: 'MainMenu',
+  created () {
+    this.$root.$on('createNewQuery', this.createNewQuery)
+  },
   methods: {
     createNewQuery () {
       const tab = {
@@ -42,8 +45,8 @@ export default {
       const isFromScratch = !this.$store.state.currentTab.initName
       const value = {
         id: currentQuery.id,
-        query: currentQuery.query
-        // TODO: save plotly settings
+        query: currentQuery.query,
+        chart: currentQuery.getChartSatateForSave()
       }
 
       if (isFromScratch) {

src/components/Schema.vue

@@ -57,8 +57,7 @@ export default {
   components: { TableDescription, TextField },
   data () {
     return {
-      schemaVisible: true,
-      worker: this.$store.state.worker
+      schemaVisible: true
     }
   },
   computed: {
@@ -71,29 +70,7 @@ export default {
   },
   methods: {
     changeDb () {
-      const dbName = this.$refs.dbfile.value.substr(this.$refs.dbfile.value.lastIndexOf('\\') + 1)
-      this.$store.commit('saveDbName', dbName)
-      const f = this.$refs.dbfile.files[0]
-      const r = new FileReader()
-      r.onload = () => {
-        this.worker.onmessage = () => {
-          const getSchemaSql = `
-            SELECT name, sql
-            FROM sqlite_master
-            WHERE type='table' AND name NOT LIKE 'sqlite_%';`
-          this.worker.onmessage = event => {
-            this.$store.commit('saveSchema', event.data.results[0].values)
-          }
-          this.worker.postMessage({ action: 'exec', sql: getSchemaSql })
-        }
-        this.$store.commit('saveDbFile', r.result)
-        try {
-          this.worker.postMessage({ action: 'open', buffer: r.result }, [r.result])
-        } catch (exception) {
-          this.worker.postMessage({ action: 'open', buffer: r.result })
-        }
-      }
-      r.readAsArrayBuffer(f)
+      this.$db.loadDb(this.$refs.dbfile.files[0])
     }
   }
 }

src/components/Splitpanes.vue

@@ -1,8 +1,13 @@
 <template>
   <div
     ref="container"
-    :class="['splitpanes', `splitpanes--${horizontal ? 'horizontal' : 'vertical'}`, { 'splitpanes--dragging': touch.dragging }]"
+    :class="[
+      'splitpanes',
+      `splitpanes--${horizontal ? 'horizontal' : 'vertical'}`,
+      { 'splitpanes--dragging': touch.dragging }
+    ]"
   >
+    <div class="movable-splitter" ref="movableSplitter" :style="movableSplitterStyle" />
     <div
       class="splitpanes__pane"
       ref="left"
@@ -12,13 +17,21 @@
     >
       <slot name="left-pane" />
     </div>
-
-    <splitter
+    <!-- Splitter start-->
+    <div
+      class="splitpanes__splitter"
       @mousedown="onMouseDown"
-      @toggle="toggleFirstPane"
-      :expanded="paneBefore.size !== 0"
-    />
-
+      @touchstart="onMouseDown"
+    >
+      <div class="toggle-btn" @click="toggleFirstPane">
+        <img
+          class="direction-icon"
+          :src="require('@/assets/images/chevron.svg')"
+          :style="directionIconStyle"
+        >
+      </div>
+    </div>
+    <!-- splitter end -->
     <div
       class="splitpanes__pane"
       ref="right"
@@ -30,33 +43,58 @@
 </template>
 
 <script>
-import Splitter from '@/components/splitter'
 
 export default {
-  name: 'splitpanes',
-  components: { Splitter },
+  name: 'Splitpanes',
   props: {
     horizontal: { type: Boolean, default: false },
     before: { type: Object },
     after: { type: Object }
   },
-  data: () => ({
-    container: null,
-    paneBefore: null,
-    paneAfter: null,
-    beforeMinimising: 20,
-    touch: {
-      mouseDown: false,
-      dragging: false
+  data () {
+    return {
+      container: null,
+      paneBefore: this.before,
+      paneAfter: this.after,
+      beforeMinimising: this.before.size,
+      touch: {
+        mouseDown: false,
+        dragging: false
+      },
+      movableSplitter: {
+        top: 0,
+        left: 0,
+        visibility: 'hidden'
+      }
     }
-  }),
-
+  },
   computed: {
     styles () {
       return [
         { [this.horizontal ? 'height' : 'width']: `${this.paneBefore.size}%` },
         { [this.horizontal ? 'height' : 'width']: `${this.paneAfter.size}%` }
       ]
+    },
+    movableSplitterStyle () {
+      const style = { ...this.movableSplitter }
+      style.top += '%'
+      style.left += '%'
+      return style
+    },
+    expanded () {
+      return this.paneBefore.size !== 0
+    },
+    directionIconStyle () {
+      const translation = 'translate(-50%, -50%)'
+      if (this.horizontal) {
+        return {
+          transform: `${translation} ${this.expanded ? 'rotate(-90deg)' : 'rotate(90deg)'}`
+        }
+      } else {
+        return {
+          transform: `${translation} ${this.expanded ? 'rotate(180deg)' : ''}`
+        }
+      }
     }
   },
 
@@ -92,12 +130,28 @@ export default {
         // Prevent scrolling while touch dragging (only works with an active event, eg. passive: false).
         event.preventDefault()
         this.touch.dragging = true
-        this.calculatePanesSize(this.getCurrentMouseDrag(event))
+        this.$set(this.movableSplitter, 'visibility', 'visible')
+        this.moveSplitter(event)
       }
     },
 
     onMouseUp () {
       this.touch.mouseDown = false
+      if (this.touch.dragging) {
+        const dragPercentage = this.horizontal
+          ? this.movableSplitter.top
+          : this.movableSplitter.left
+
+        this.paneBefore.size = dragPercentage
+        this.paneAfter.size = 100 - dragPercentage
+
+        this.movableSplitter = {
+          top: 0,
+          left: 0,
+          visibility: 'hidden'
+        }
+      }
+
       // Keep dragging flag until click event is finished (click happens immediately after mouseup)
       // in order to prevent emitting `splitter-click` event if splitter was dragged.
       setTimeout(() => {
@@ -109,8 +163,9 @@ export default {
     // Get the cursor position relative to the splitpane container.
     getCurrentMouseDrag (event) {
       const rect = this.container.getBoundingClientRect()
-      const { clientX, clientY } = ('ontouchstart' in window && event.touches) ? event.touches[0] : event
-
+      const { clientX, clientY } = ('ontouchstart' in window && event.touches)
+        ? event.touches[0]
+        : event
       return {
         x: clientX - rect.left,
         y: clientY - rect.top
@@ -126,27 +181,26 @@ export default {
       return drag * 100 / containerSize
     },
 
-    calculatePanesSize (drag) {
-      const dragPercentage = this.getCurrentDragPercentage(drag)
-      // If not pushing other panes, panes to resize are right before and right after splitter.
+    moveSplitter (event) {
+      const dragPercentage = this.getCurrentDragPercentage(this.getCurrentMouseDrag(event))
       const paneBefore = this.paneBefore
       const paneAfter = this.paneAfter
 
       const paneBeforeMaxReached = paneBefore.max < 100 && (dragPercentage >= paneBefore.max)
       const paneAfterMaxReached = paneAfter.max < 100 && (dragPercentage <= 100 - paneAfter.max)
+
+      const dir = this.horizontal ? 'top' : 'left'
+
       // Prevent dragging beyond pane max.
       if (paneBeforeMaxReached || paneAfterMaxReached) {
         if (paneBeforeMaxReached) {
-          paneBefore.size = paneBefore.max
-          paneAfter.size = Math.max(100 - paneBefore.max, 0)
+          this.$set(this.movableSplitter, dir, paneBefore.max)
         } else {
-          paneBefore.size = Math.max(100 - paneAfter.max, 0)
-          paneAfter.size = paneAfter.max
+          this.$set(this.movableSplitter, dir, Math.max(100 - paneAfter.max, 0))
         }
-        return
+      } else {
+        this.$set(this.movableSplitter, dir, Math.min(Math.max(dragPercentage, 0), paneBefore.max))
       }
-      paneBefore.size = Math.min(Math.max(dragPercentage, 0), paneBefore.max)
-      paneAfter.size = Math.min(Math.max(100 - dragPercentage, 0), paneAfter.max)
     },
     toggleFirstPane () {
       if (this.paneBefore.size > 0) {
@@ -160,10 +214,6 @@ export default {
   },
   mounted () {
     this.container = this.$refs.container
-  },
-  created () {
-    this.paneBefore = this.before
-    this.paneAfter = this.after
   }
 }
 </script>
@@ -172,6 +222,7 @@ export default {
 .splitpanes {
   display: flex;
   height: 100%;
+  position: relative;
 }
 
 .splitpanes--vertical {flex-direction: row;}
@@ -183,4 +234,68 @@ export default {
   height: 100%;
   overflow: auto;
 }
+
+/* Splitter */
+
+.splitpanes--vertical > .splitpanes__splitter,
+.splitpanes--vertical.splitpanes--dragging {
+  cursor: col-resize;
+}
+.splitpanes--horizontal > .splitpanes__splitter,
+.splitpanes--horizontal.splitpanes--dragging {
+  cursor: row-resize;
+}
+
+.splitpanes__splitter {
+  touch-action: none;
+  background-color: var(--color-bg-light-2);
+  box-sizing: border-box;
+  position: relative;
+  flex-shrink: 0;
+  z-index: 1;
+}
+
+.movable-splitter {
+  position: absolute;
+  background-color:rgba(162, 177, 198, 0.5);
+}
+
+.splitpanes--vertical > .splitpanes__splitter,
+.splitpanes--vertical .movable-splitter {
+  width: 3px;
+  z-index: 5;
+  height: 100%
+}
+
+.splitpanes--horizontal > .splitpanes__splitter,
+.splitpanes--horizontal .movable-splitter {
+  height: 3px;
+  width: 100%;
+}
+.splitpanes__splitter .toggle-btn {
+  background-color: var(--color-bg-light-2);
+  border-radius: var(--border-radius-small);
+  position: absolute;
+  top: 50%;
+  left: 50%;
+  transform: translate(-50%, -50%);
+}
+
+.splitpanes__splitter .toggle-btn:hover {
+  cursor: pointer;
+}
+
+.splitpanes--vertical .toggle-btn {
+  height: 68px;
+  width: 15px;
+}
+.splitpanes--horizontal .toggle-btn {
+  width: 68px;
+  height: 15px;
+}
+.splitpanes__splitter .toggle-btn .direction-icon {
+  position: absolute;
+  top: 50%;
+  left: 50%;
+}
 </style>

src/components/SqlEditor.vue

@@ -0,0 +1,82 @@
+<template>
+  <div class="codemirror-container">
+    <codemirror v-model="query" :options="cmOptions" @changes="onCmChange" />
+  </div>
+</template>
+
+<script>
+import CM from 'codemirror'
+import { codemirror } from 'vue-codemirror'
+import 'codemirror/lib/codemirror.css'
+import 'codemirror/mode/sql/sql.js'
+import 'codemirror/theme/neo.css'
+import 'codemirror/addon/hint/show-hint.js'
+import 'codemirror/addon/hint/show-hint.css'
+import 'codemirror/addon/hint/sql-hint.js'
+
+export default {
+  name: 'SqlEditor',
+  props: ['value'],
+  components: {
+    codemirror
+  },
+  data () {
+    return {
+      query: this.value,
+      cmOptions: {
+        // codemirror options
+        tabSize: 4,
+        mode: 'text/x-mysql',
+        theme: 'neo',
+        lineNumbers: true,
+        line: true
+      },
+      result: null
+    }
+  },
+  watch: {
+    query () {
+      this.$emit('input', this.query)
+    }
+  },
+  methods: {
+    onCmChange (editor) {
+      // Don't show autocomplete after a space or semicolon
+      const ch = editor.getTokenAt(editor.getCursor()).string.slice(-1)
+      if (!ch || ch === ' ' || ch === ';') {
+        return
+      }
+
+      const hintOptions = {
+      //   tables: this.state.tables,
+        completeSingle: false,
+        completeOnSingleClick: true
+      }
+
+      // editor.hint.sql is defined when importing codemirror/addon/hint/sql-hint
+      // (this is mentioned in codemirror addon documentation)
+      // Reference the hint function imported here when including other hint addons
+      // or supply your own
+      CM.showHint(editor, CM.hint.sql, hintOptions)
+    }
+  }
+}
+</script>
+
+<style scoped>
+.codemirror-container {
+  flex-grow: 1;
+  min-height: 0;
+}
+
+>>> .vue-codemirror {
+  height: 100%;
+  max-height: 100%;
+}
+>>> .CodeMirror {
+  border: 1px solid var(--color-border);
+  border-radius: var(--border-radius-big);
+  height: 100%;
+  max-height: 100%;
+}
+</style>

src/components/SqlTable.vue

@@ -17,7 +17,7 @@
         class="table-container"
         ref="table-container"
         @scroll="onScrollTable"
-        :style="{height: `${height}px`}"
+        :style="{maxHeight: `${height}px`}"
       >
       <table ref="table">
         <thead>

src/components/TabContent.vue

@@ -6,122 +6,89 @@
       :before="{ size: 50, max: 50 }"
       :after="{ size: 50, max: 100 }"
     >
-      <div slot="left-pane" class="query-editor">
-        <div class="codemirror-container">
-          <codemirror v-model="query" :options="cmOptions" @changes="onCmChange" ref="codemirror" />
+      <template #left-pane>
+        <div class="query-editor">
+          <sql-editor v-model="query" />
+          <div  class="run-btn-container">
+            <button
+              class="primary run-btn"
+              @click="execute"
+              :disabled="!$store.state.schema || !query"
+            >
+              Run
+            </button>
+          </div>
         </div>
-        <div  class="run-btn-container">
-          <button class="primary run-btn" @click="execEditorContents">Run</button>
+      </template>
+      <template #right-pane>
+        <div id="bottomPane" ref="bottomPane">
+          <view-switcher :view.sync="view" />
+          <div v-show="view === 'table'" class="table-view">
+            <div v-show="result === null && !isGettingResults && !error" class="table-preview">
+              Run your query and get results here
+            </div>
+            <div v-show="isGettingResults" class="table-preview">
+              Fetching results...
+            </div>
+            <div v-show="result === undefined && !isGettingResults && !error" class="table-preview">
+              No rows retrieved according to your query
+            </div>
+            <div v-show="error" class="table-preview error">
+              {{ error }}
+            </div>
+            <sql-table v-if="result" :data="result" :height="tableViewHeight" />
+          </div>
+          <chart
+            :visible="view === 'chart'"
+            :sql-result="result"
+            :init-chart="initChart"
+            ref="chart"
+            @update="isUnsaved = true"
+          />
         </div>
-      </div>
-      <div slot="right-pane" id="bottomPane" ref="bottomPane">
-        <view-switcher :view.sync="view" />
-        <div v-show="view === 'table'" class="table-view">
-         <!--  <div id="error" class="error"></div>
-          <pre ref="output" id="output">Results will be displayed here</pre> -->
-          <sql-table v-if="result" :data="result" :height="tableViewHeight" />
-        </div>
-        <PlotlyEditor
-          v-show="view === 'chart'"
-          :data="state.data"
-          :layout="state.layout"
-          :frames="state.frames"
-          :config="{ editable: true }"
-          :dataSources="dataSources"
-          :dataSourceOptions="dataSourceOptions"
-          :plotly="plotly"
-          @onUpdate="update"
-          :useResizeHandler="true"
-          :debug="true"
-          :advancedTraceTypeSelector="true"
-        />
-      </div>
+      </template>
     </splitpanes>
   </div>
 </template>
 
 <script>
 import SqlTable from '@/components/SqlTable'
-import Splitpanes from '@/components/splitpanes'
+import SqlEditor from '@/components/SqlEditor'
+import Splitpanes from '@/components/Splitpanes'
 import ViewSwitcher from '@/components/ViewSwitcher'
-
-import plotly from 'plotly.js/dist/plotly'
-import 'react-chart-editor/lib/react-chart-editor.min.css'
-
-import CM from 'codemirror'
-import { codemirror } from 'vue-codemirror'
-import 'codemirror/lib/codemirror.css'
-import 'codemirror/mode/sql/sql.js'
-import 'codemirror/theme/neo.css'
-import 'codemirror/addon/hint/show-hint.js'
-import 'codemirror/addon/hint/show-hint.css'
-import 'codemirror/addon/hint/sql-hint.js'
-
-import PlotlyEditor from 'react-chart-editor'
+import Chart from '@/components/Chart'
 
 export default {
   name: 'TabContent',
-  props: ['id', 'initName', 'initQuery', 'initPlotly', 'tabIndex'],
+  props: ['id', 'initName', 'initQuery', 'initChart', 'tabIndex'],
   components: {
-    codemirror,
+    SqlEditor,
     SqlTable,
     Splitpanes,
     ViewSwitcher,
-    PlotlyEditor
+    Chart
   },
   data () {
     return {
-      plotly: plotly,
-      state: {
-        data: [],
-        layout: {},
-        frames: []
-      },
-      query: 'select * from albums',
-      cmOptions: {
-        // codemirror options
-        tabSize: 4,
-        mode: 'text/x-mysql',
-        theme: 'neo',
-        lineNumbers: true,
-        line: true
-      },
+      query: this.initQuery,
       result: null,
       view: 'table',
       tableViewHeight: 0,
-      worker: this.$store.state.worker,
-      isUnsaved: !this.name
+      isUnsaved: !this.initName,
+      isGettingResults: false,
+      error: null
     }
   },
   computed: {
     isActive () {
       return this.id === this.$store.state.currentTabId
-    },
-    dataSources () {
-      if (!this.result) {
-        return {}
-      }
-      const dataSorces = {}
-      const matrix = this.result.values
-      const [row] = matrix
-      const transposedMatrix = row.map((value, column) => matrix.map(row => row[column]))
-      this.result.columns.forEach((column, index) => {
-        dataSorces[column] = transposedMatrix[index]
-      })
-      return dataSorces
-    },
-    dataSourceOptions () {
-      return Object.keys(this.dataSources).map(name => ({
-        value: name,
-        label: name
-      }))
     }
   },
   created () {
     this.$store.commit('setCurrentTab', this)
   },
   mounted () {
-    new ResizeObserver(this.calculateTableHeight).observe(this.$refs.bottomPane)
+    new ResizeObserver(this.handleResize).observe(this.$refs.bottomPane)
     this.calculateTableHeight()
   },
   watch: {
@@ -138,47 +105,32 @@ export default {
     }
   },
   methods: {
-    update (data, layout, frames) {
-      this.state = { data, layout, frames }
-      this.isUnsaved = true
-      console.log(this.state)
-    },
-    onCmChange (editor) {
-      // Don't show autocomplete after a space or semicolon
-      const ch = editor.getTokenAt(editor.getCursor()).string.slice(-1)
-      if (!ch || ch === ' ' || ch === ';') {
-        return
-      }
-
-      const hintOptions = {
-      //   tables: this.state.tables,
-        completeSingle: false,
-        completeOnSingleClick: true
-      }
-
-      // editor.hint.sql is defined when importing codemirror/addon/hint/sql-hint
-      // (this is mentioned in codemirror addon documentation)
-      // Reference the hint function imported here when including other hint addons
-      // or supply your own
-      CM.showHint(editor, CM.hint.sql, hintOptions)
-    },
     // Run a command in the database
-    execute (commands) {
-      this.worker.onmessage = (event) => {
-        // if it was more than one select - take only the first one
-        this.result = event.data.results[0]
-        if (!this.result) {
-          console.log(event.data.error)
-          //  return
-        }
-
-        // this.$refs.output.innerHTML = ''
-      }
-      this.worker.postMessage({ action: 'exec', sql: commands })
-      // this.$refs.output.textContent = 'Fetching results...'
+    execute () {
+      // this.$refs.output.textContent = 'Fetching results...' */
+      this.isGettingResults = true
+      this.result = null
+      this.error = null
+      this.$db.execute(this.query + ';')
+        .then(result => {
+          this.result = result
+        })
+        .catch(err => {
+          this.error = err
+        })
+        .finally(() => {
+          this.isGettingResults = false
+        })
     },
-    execEditorContents () {
-      this.execute(this.query + ';')
+    handleResize () {
+      if (this.view === 'chart') {
+        // hack react-chart editor: hidden and show in order to make the graph resize
+        this.view = 'not chart'
+        this.$nextTick(() => {
+          this.view = 'chart'
+        })
+      }
+      this.calculateTableHeight()
     },
     calculateTableHeight () {
       const bottomPane = this.$refs.bottomPane
@@ -189,6 +141,9 @@ export default {
       // 40 - height of table header
       const freeSpace = bottomPane.offsetHeight - 88 - 42 - 30 - 5 - 40
       this.tableViewHeight = freeSpace - (freeSpace % 40)
+    },
+    getChartSatateForSave () {
+      return this.$refs.chart.getChartSatateForSave()
     }
   }
 }
@@ -222,29 +177,33 @@ export default {
   height: 100%;
   max-height: 100%;
   box-sizing: border-box;
-  min-height: 150px;
-}
-
-.codemirror-container {
-  flex-grow: 1;
-  min-height: 0;
+  min-height: 190px;
 }
 
 .run-btn-container {
   text-align: right;
 }
 
->>> .vue-codemirror {
-  height: 100%;
-  max-height: 100%;
-}
->>> .CodeMirror {
-  border: 1px solid var(--color-border);
-  border-radius: var(--border-radius-big);
-  height: 100%;
-  max-height: 100%;
-}
 .table-view {
   margin: 0 52px;
+  height: calc(100% - 88px);
+  position: relative;
+}
+
+.table-preview {
+  position: absolute;
+  top: 40%;
+  left: 50%;
+  transform: translate(-50%, -50%);
+  color: var(--color-text-base);
+  font-size: 13px;
+}
+
+.table-preview.error {
+  color: var(--color-text-error);
+}
+
+.table-preview.error::first-letter {
+  text-transform: capitalize;
 }
 </style>

src/components/Tabs.vue

@@ -1,6 +1,6 @@
 <template>
-   <div>
-    <div id="tabs__header">
+   <div id="tabs-container">
+    <div id="tabs__header" v-if="tabs.length > 0">
       <div
         v-for="(tab, index) in tabs"
         :key="tab.id"
@@ -34,8 +34,15 @@
       :key="tab.id"
       :id="tab.id"
       :init-name="tab.name"
+      :init-query="tab.query"
+      :init-chart="tab.chart"
       :tab-index="index"
     />
+    <div v-if="tabs.length === 0" id="start-guide">
+      <span class="link" @click="$root.$emit('createNewQuery')">Create</span>
+      a new query from scratch or open the one from
+      <router-link class="link" to="/my-queries">My queries</router-link>
+    </div>
   </div>
 </template>
 
@@ -70,6 +77,10 @@ export default {
 </script>
 
 <style>
+#tabs-container {
+  position: relative;
+  height: 100%;
+}
 #tabs__header {
   display: flex;
   margin: 0;
@@ -129,4 +140,18 @@ export default {
   fill: var(--color-text-base);
   cursor: pointer;
 }
+#start-guide {
+  position: absolute;
+  top: 50%;
+  left: 50%;
+  transform: translate(-50%, -50%);
+  color: var(--color-text-base);
+  font-size: 14px;
+  text-align: center;
+}
+.link {
+  color: var(--color-accent);
+  text-decoration: none;
+  cursor: pointer;
+}
 </style>

src/components/splitter.vue

@@ -1,85 +0,0 @@
-<template>
-  <div
-    class="splitpanes__splitter"
-    @mousedown="$emit('mousedown')"
-    @touchstart="$emit('mousedown')"
-  >
-    <div class="toggle-btn" @click="$emit('toggle')">
-      <img
-        class="direction-icon"
-        :src="require('@/assets/images/chevron.svg')"
-        :style="directionIconStyle"
-      >
-    </div>
-  </div>
-</template>
-
-<script>
-export default {
-  name: 'splitter',
-  props: ['expanded'],
-  computed: {
-    directionIconStyle () {
-      const translation = 'translate(-50%, -50%)'
-      if (this.$parent.horizontal) {
-        return {
-          transform: `${translation} ${this.expanded ? 'rotate(-90deg)' : 'rotate(90deg)'}`
-        }
-      } else {
-        return {
-          transform: `${translation} ${this.expanded ? 'rotate(180deg)' : ''}`
-        }
-      }
-    }
-  }
-}
-</script>
-
-<style>
-.splitpanes--vertical > .splitpanes__splitter {min-width: 1px;cursor: col-resize;}
-.splitpanes--horizontal > .splitpanes__splitter {min-height: 1px; cursor: row-resize;}
-.splitpanes__splitter {
-  touch-action: none;
-  background-color: var(--color-bg-light-2);
-  box-sizing: border-box;
-  position: relative;
-  flex-shrink: 0;
-  z-index: 1;
-}
-
-.splitpanes--vertical > .splitpanes__splitter {
-  width: 3px;
-  z-index: 3;
-}
-
-.splitpanes--horizontal > .splitpanes__splitter {
-  height: 3px;
-  width: 100%;
-}
-.splitpanes__splitter .toggle-btn {
-  background-color: var(--color-bg-light-2);
-  border-radius: var(--border-radius-small);
-  position: absolute;
-  top: 50%;
-  left: 50%;
-  transform: translate(-50%, -50%);
-}
-
-.splitpanes__splitter .toggle-btn:hover {
-  cursor: pointer;
-}
-
-.splitpanes--vertical .toggle-btn {
-  height: 68px;
-  width: 15px;
-}
-.splitpanes--horizontal .toggle-btn {
-  width: 68px;
-  height: 15px;
-}
-.splitpanes__splitter .toggle-btn .direction-icon {
-  position: absolute;
-  top: 50%;
-  left: 50%;
-}
-</style>

src/dataBase.js

@@ -0,0 +1,46 @@
+import store from '@/store'
+import router from '@/router'
+const worker = new Worker('js/worker.sql-wasm.js')
+
+export default {
+  loadDb (file) {
+    const dbName = file.name
+    store.commit('saveDbName', dbName)
+    const f = file
+    const r = new FileReader()
+    r.onload = () => {
+      worker.onmessage = () => {
+        const getSchemaSql = `
+          SELECT name, sql
+          FROM sqlite_master
+          WHERE type='table' AND name NOT LIKE 'sqlite_%';`
+        worker.onmessage = event => {
+          store.commit('saveSchema', event.data.results[0].values)
+          if (router.currentRoute.path !== '/editor') {
+            router.push('/editor')
+          }
+        }
+        worker.postMessage({ action: 'exec', sql: getSchemaSql })
+      }
+      store.commit('saveDbFile', r.result)
+      try {
+        worker.postMessage({ action: 'open', buffer: r.result }, [r.result])
+      } catch (exception) {
+        worker.postMessage({ action: 'open', buffer: r.result })
+      }
+    }
+    r.readAsArrayBuffer(f)
+  },
+  execute (commands) {
+    return new Promise((resolve, reject) => {
+      worker.onmessage = (event) => {
+        if (event.data.error) {
+          reject(event.data.error)
+        }
+        // if it was more than one select - take only the first one
+        resolve(event.data.results[0])
+      }
+      worker.postMessage({ action: 'exec', sql: commands })
+    })
+  }
+}

src/main.js

@@ -4,6 +4,7 @@ import router from './router'
 import store from './store'
 import { VuePlugin } from 'vuera'
 import VModal from 'vue-js-modal'
+import db from '@/dataBase'
 
 import '@/assets/styles/variables.css'
 import '@/assets/styles/buttons.css'
@@ -14,6 +15,7 @@ Vue.use(VuePlugin)
 Vue.use(VModal)
 
 Vue.config.productionTip = false
+Vue.prototype.$db = db
 
 new Vue({
   router,

src/store/index.js

@@ -8,7 +8,6 @@ export default new Vuex.Store({
     schema: null,
     dbFile: null,
     dbName: null,
-    worker: new Worker('js/worker.sql-wasm.js'),
     tabs: [],
     currentTab: null,
     currentTabId: null,

src/views/DbUpload.vue

@@ -16,47 +16,22 @@
       </div>
     </label>
     <div id="error" class="error"></div>
+    <button id ="skip" class="secondary" @click="$router.push('/editor')">
+      Skip database connection for now
+    </button>
   </div>
 </template>
 
 <script>
 export default {
   name: 'DbUpload',
-  data () {
-    return {
-      worker: this.$store.state.worker
-    }
-  },
   methods: {
     loadDb () {
-      const dbName = this.$refs.file.value.substr(this.$refs.file.value.lastIndexOf('\\') + 1)
-      this.$store.commit('saveDbName', dbName)
-      const f = this.$refs.file.files[0]
-      const r = new FileReader()
-      r.onload = () => {
-        this.worker.onmessage = () => {
-          const getSchemaSql = `
-            SELECT name, sql
-            FROM sqlite_master
-            WHERE type='table' AND name NOT LIKE 'sqlite_%';`
-          this.worker.onmessage = event => {
-            this.$store.commit('saveSchema', event.data.results[0].values)
-            this.$router.push('/editor')
-          }
-          this.worker.postMessage({ action: 'exec', sql: getSchemaSql })
-        }
-        this.$store.commit('saveDbFile', r.result)
-        try {
-          this.worker.postMessage({ action: 'open', buffer: r.result }, [r.result])
-        } catch (exception) {
-          this.worker.postMessage({ action: 'open', buffer: r.result })
-        }
-      }
-      r.readAsArrayBuffer(f)
+      this.$db.loadDb(this.$refs.file.files[0])
     },
     dragover (event) {
       event.preventDefault()
-      // TODO: Add some visual fluff to show the user can drop its files
+      // TODO: Add some visual stuff to show the user can drop its files
       if (!event.currentTarget.classList.contains('bg-green-300')) {
         event.currentTarget.classList.remove('bg-gray-100')
         event.currentTarget.classList.add('bg-green-300')
@@ -98,17 +73,21 @@ label {
   border-radius: var(--border-radius-big);
 }
 #drop-area {
-  width: 231px;
-  height: 153px;
+  width: 628px;
+  height: 490px;
   background-color: var(--color-bg-light-3);
   border-radius: var(--border-radius-big);
   color: var(--color-text-base);
   font-size: 13px;
-  padding: 44px 15px;
+  padding: 200px 144px;
   text-align: center;
   box-sizing: border-box;
 }
 input {
   display: none;
 }
+#skip {
+  position: absolute;
+  bottom: 50px;
+}
 </style>

src/views/Editor.vue

@@ -5,18 +5,18 @@
       :before="{ size: 20, max: 30 }"
       :after="{ size: 80, max: 100 }"
     >
-      <div slot="left-pane">
+      <template #left-pane>
         <schema />
-      </div>
-      <div slot="right-pane">
+      </template>
+      <template #right-pane>
         <tabs />
-      </div>
+      </template>
     </splitpanes>
   </div>
 </template>
 
 <script>
-import Splitpanes from '@/components/splitpanes'
+import Splitpanes from '@/components/Splitpanes'
 import Schema from '@/components/Schema'
 import Tabs from '@/components/Tabs'