adds double-click to reset view to 100% (#2436)

Adds double-click to reset canvas view to 100%.

- Adds hook to manage single and double clicks
- Single Click `Reset Canvas View` --> scale to fit, no change to
current behaviour
- Double Click `Reset Canvas View` --> set scale to 1

frontend/src/common/hooks/useSingleAndDoubleClick.ts

@@ -0,0 +1,28 @@
+// https://stackoverflow.com/a/73731908
+
+import { useEffect, useState } from 'react';
+
+export function useSingleAndDoubleClick(
+  handleSingleClick: () => void,
+  handleDoubleClick: () => void,
+  delay = 250
+) {
+  const [click, setClick] = useState(0);
+
+  useEffect(() => {
+    const timer = setTimeout(() => {
+      if (click === 1) {
+        handleSingleClick();
+      }
+      setClick(0);
+    }, delay);
+
+    if (click === 2) {
+      handleDoubleClick();
+    }
+
+    return () => clearTimeout(timer);
+  }, [click, handleSingleClick, handleDoubleClick, delay]);
+
+  return () => setClick((prev) => prev + 1);
+}

frontend/src/features/canvas/components/IAICanvasToolbar/IAICanvasToolbar.tsx

@@ -42,6 +42,7 @@ import {
 } from 'features/canvas/store/canvasTypes';
 import { ChangeEvent } from 'react';
 import { useTranslation } from 'react-i18next';
+import { useSingleAndDoubleClick } from 'common/hooks/useSingleAndDoubleClick';
 
 export const selector = createSelector(
   [systemSelector, canvasSelector, isStagingSelector],
@@ -156,7 +157,12 @@ const IAICanvasOutpaintingControls = () => {
 
   const handleSelectMoveTool = () => dispatch(setTool('move'));
 
-  const handleResetCanvasView = () => {
+  const handleClickResetCanvasView = useSingleAndDoubleClick(
+    () => handleResetCanvasView(false),
+    () => handleResetCanvasView(true)
+  );
+
+  const handleResetCanvasView = (shouldScaleTo1 = false) => {
     const canvasBaseLayer = getCanvasBaseLayer();
     if (!canvasBaseLayer) return;
     const clientRect = canvasBaseLayer.getClientRect({
@@ -165,6 +171,7 @@ const IAICanvasOutpaintingControls = () => {
     dispatch(
       resetCanvasView({
         contentRect: clientRect,
+        shouldScaleTo1,
       })
     );
   };
@@ -247,7 +254,7 @@ const IAICanvasOutpaintingControls = () => {
           aria-label={`${t('unifiedcanvas:resetView')} (R)`}
           tooltip={`${t('unifiedcanvas:resetView')} (R)`}
           icon={<FaCrosshairs />}
-          onClick={handleResetCanvasView}
+          onClick={handleClickResetCanvasView}
         />
       </ButtonGroup>
 

frontend/src/features/canvas/store/canvasSlice.ts

@@ -602,9 +602,10 @@ export const canvasSlice = createSlice({
       state,
       action: PayloadAction<{
         contentRect: IRect;
+        shouldScaleTo1?: boolean;
       }>
     ) => {
-      const { contentRect } = action.payload;
+      const { contentRect, shouldScaleTo1 } = action.payload;
       const {
         stageDimensions: { width: stageWidth, height: stageHeight },
       } = state;
@@ -612,7 +613,9 @@ export const canvasSlice = createSlice({
       const { x, y, width, height } = contentRect;
 
       if (width !== 0 && height !== 0) {
-        const newScale = calculateScale(
+        const newScale = shouldScaleTo1
+          ? 1
+          : calculateScale(
               stageWidth,
               stageHeight,
               width,

frontend/src/features/tabs/components/UnifiedCanvas/UnifiedCanvasBeta/UnifiedCanvasToolbar/UnifiedCanvasResetView.tsx

@@ -1,5 +1,6 @@
 import { useAppDispatch } from 'app/storeHooks';
 import IAIIconButton from 'common/components/IAIIconButton';
+import { useSingleAndDoubleClick } from 'common/hooks/useSingleAndDoubleClick';
 import { resetCanvasView } from 'features/canvas/store/canvasSlice';
 import { getCanvasBaseLayer } from 'features/canvas/util/konvaInstanceProvider';
 import React from 'react';
@@ -24,7 +25,12 @@ export default function UnifiedCanvasResetView() {
     [canvasBaseLayer]
   );
 
-  const handleResetCanvasView = () => {
+  const handleClickResetCanvasView = useSingleAndDoubleClick(
+    () => handleResetCanvasView(false),
+    () => handleResetCanvasView(true)
+  );
+
+  const handleResetCanvasView = (shouldScaleTo1 = false) => {
     const canvasBaseLayer = getCanvasBaseLayer();
     if (!canvasBaseLayer) return;
     const clientRect = canvasBaseLayer.getClientRect({
@@ -33,6 +39,7 @@ export default function UnifiedCanvasResetView() {
     dispatch(
       resetCanvasView({
         contentRect: clientRect,
+        shouldScaleTo1,
       })
     );
   };
@@ -41,7 +48,7 @@ export default function UnifiedCanvasResetView() {
       aria-label={`${t('unifiedcanvas:resetView')} (R)`}
       tooltip={`${t('unifiedcanvas:resetView')} (R)`}
       icon={<FaCrosshairs />}
-      onClick={handleResetCanvasView}
+      onClick={handleClickResetCanvasView}
     />
   );
 }