feat(ui): add flip & reset to transform

invokeai/frontend/web/public/locales/en.json

@@ -1738,6 +1738,8 @@
         "unlocked": "Unlocked",
         "deleteSelected": "Delete Selected",
         "deleteAll": "Delete All",
+        "flipHorizontal": "Flip Horizontal",
+        "flipVertical": "Flip Vertical",
         "fill": {
             "fillStyle": "Fill Style",
             "solid": "Solid",

invokeai/frontend/web/src/features/controlLayers/components/ControlLayersEditor.tsx

@@ -32,14 +32,14 @@ export const CanvasEditor = memo(() => {
     >
       <ControlLayersToolbar />
       <StageComponent />
-      <Flex position="absolute" bottom={16} gap={2} align="center" justify="center">
+      <Flex position="absolute" bottom={8} gap={2} align="center" justify="center">
         <CanvasManagerProviderGate>
           <StagingAreaIsStagingGate>
             <StagingAreaToolbar />
           </StagingAreaIsStagingGate>
         </CanvasManagerProviderGate>
       </Flex>
-      <Flex position="absolute" bottom={16}>
+      <Flex position="absolute" bottom={8}>
         <CanvasManagerProviderGate>
           <Filter />
           <Transform />

invokeai/frontend/web/src/features/controlLayers/components/Transform.tsx

@@ -6,9 +6,15 @@ import {
   useEntityIdentifierContext,
 } from 'features/controlLayers/contexts/EntityIdentifierContext';
 import { useEntityAdapter } from 'features/controlLayers/hooks/useEntityAdapter';
-import { memo, useCallback } from 'react';
+import { memo } from 'react';
 import { useTranslation } from 'react-i18next';
-import { PiCheckBold, PiXBold } from 'react-icons/pi';
+import {
+  PiArrowsCounterClockwiseBold,
+  PiCheckBold,
+  PiFlipHorizontalFill,
+  PiFlipVerticalFill,
+  PiXBold,
+} from 'react-icons/pi';
 
 const TransformBox = memo(() => {
   const { t } = useTranslation();
@@ -16,14 +22,6 @@ const TransformBox = memo(() => {
   const adapter = useEntityAdapter(entityIdentifier);
   const isProcessing = useStore(adapter.transformer.$isProcessing);
 
-  const applyTransform = useCallback(() => {
-    adapter.transformer.applyTransform();
-  }, [adapter.transformer]);
-
-  const cancelFilter = useCallback(() => {
-    adapter.transformer.stopTransform();
-  }, [adapter.transformer]);
-
   return (
     <Flex
       bg="base.800"
@@ -40,16 +38,49 @@ const TransformBox = memo(() => {
       <Heading size="md" color="base.300" userSelect="none">
         {t('controlLayers.tool.transform')}
       </Heading>
+      <ButtonGroup isAttached={false} size="sm" justifyContent="center">
+        <Button
+          leftIcon={<PiFlipHorizontalFill />}
+          onClick={adapter.transformer.flipHorizontal}
+          isLoading={isProcessing}
+          loadingText={t('controlLayers.flipHorizontal')}
+        >
+          {t('controlLayers.flipHorizontal')}
+        </Button>
+        <Button
+          leftIcon={<PiFlipVerticalFill />}
+          onClick={adapter.transformer.flipVertical}
+          isLoading={isProcessing}
+          loadingText={t('controlLayers.flipVertical')}
+        >
+          {t('controlLayers.flipVertical')}
+        </Button>
+        <Button
+          leftIcon={<PiArrowsCounterClockwiseBold />}
+          onClick={adapter.transformer.resetTransform}
+          isLoading={isProcessing}
+          loadingText={t('controlLayers.reset')}
+        >
+          {t('accessibility.reset')}
+        </Button>
+      </ButtonGroup>
       <ButtonGroup isAttached={false} size="sm" alignSelf="self-end">
         <Button
           leftIcon={<PiCheckBold />}
-          onClick={applyTransform}
+          onClick={adapter.transformer.applyTransform}
           isLoading={isProcessing}
           loadingText={t('common.apply')}
+          variant="ghost"
         >
           {t('common.apply')}
         </Button>
-        <Button leftIcon={<PiXBold />} onClick={cancelFilter} isLoading={isProcessing} loadingText={t('common.cancel')}>
+        <Button
+          leftIcon={<PiXBold />}
+          onClick={adapter.transformer.stopTransform}
+          isLoading={isProcessing}
+          loadingText={t('common.cancel')}
+          variant="ghost"
+        >
           {t('common.cancel')}
         </Button>
       </ButtonGroup>

invokeai/frontend/web/src/features/controlLayers/konva/CanvasEntityTransformer.ts

@@ -259,13 +259,7 @@ export class CanvasEntityTransformer extends CanvasModuleABC {
       // This is called when a transform anchor is dragged. By this time, the transform constraints in the above
       // callbacks have been enforced, and the transformer has updated its nodes' attributes. We need to pass the
       // updated attributes to the object group, propagating the transformation on down.
-      this.parent.renderer.konva.objectGroup.setAttrs({
-        x: this.konva.proxyRect.x(),
-        y: this.konva.proxyRect.y(),
-        scaleX: this.konva.proxyRect.scaleX(),
-        scaleY: this.konva.proxyRect.scaleY(),
-        rotation: this.konva.proxyRect.rotation(),
-      });
+      this.syncObjectGroupWithProxyRect();
     });
 
     this.konva.transformer.on('transformend', () => {
@@ -395,6 +389,53 @@ export class CanvasEntityTransformer extends CanvasModuleABC {
     this.parent.konva.layer.add(this.konva.transformer);
   }
 
+  flipHorizontal = () => {
+    if (!this.isTransforming || this.$isProcessing.get()) {
+      return;
+    }
+
+    // Flipping horizontally = flipping across the vertical axis:
+    // - Flip by negating the x scale
+    // - Restore position by translating the rect rightwards by the width of the rect
+    const x = this.konva.proxyRect.x();
+    const width = this.konva.proxyRect.width();
+    const scaleX = this.konva.proxyRect.scaleX();
+    this.konva.proxyRect.setAttrs({
+      scaleX: -scaleX,
+      x: x + width * scaleX,
+    });
+
+    this.syncObjectGroupWithProxyRect();
+  };
+
+  flipVertical = () => {
+    if (!this.isTransforming || this.$isProcessing.get()) {
+      return;
+    }
+
+    // Flipping vertically = flipping across the horizontal axis:
+    // - Flip by negating the y scale
+    // - Restore position by translating the rect downwards by the height of the rect
+    const y = this.konva.proxyRect.y();
+    const height = this.konva.proxyRect.height();
+    const scaleY = this.konva.proxyRect.scaleY();
+    this.konva.proxyRect.setAttrs({
+      scaleY: -scaleY,
+      y: y + height * scaleY,
+    });
+    this.syncObjectGroupWithProxyRect();
+  };
+
+  syncObjectGroupWithProxyRect = () => {
+    this.parent.renderer.konva.objectGroup.setAttrs({
+      x: this.konva.proxyRect.x(),
+      y: this.konva.proxyRect.y(),
+      scaleX: this.konva.proxyRect.scaleX(),
+      scaleY: this.konva.proxyRect.scaleY(),
+      rotation: this.konva.proxyRect.rotation(),
+    });
+  };
+
   /**
    * Updates the transformer's visual components to match the parent entity's position and bounding box.
    * @param position The position of the parent entity
@@ -510,6 +551,12 @@ export class CanvasEntityTransformer extends CanvasModuleABC {
     this.stopTransform();
   };
 
+  resetTransform = () => {
+    this.resetScale();
+    this.updatePosition();
+    this.updateBbox();
+  };
+
   /**
    * Stops the transformation of the entity. If the transformation is in progress, the entity will be reset to its
    * original state.
@@ -520,12 +567,9 @@ export class CanvasEntityTransformer extends CanvasModuleABC {
     this.isTransforming = false;
     this.setInteractionMode('off');
 
-    // Reset the scale of the the entity. We've either replaced the transformed objects with a rasterized image, or
+    // Reset the transform of the the entity. We've either replaced the transformed objects with a rasterized image, or
     // canceled a transformation. In either case, the scale should be reset.
-    this.resetScale();
-
-    this.updatePosition();
-    this.updateBbox();
+    this.resetTransform();
     this.syncInteractionState();
     this.manager.stateApi.$transformingEntity.set(null);
     this.$isProcessing.set(false);