Merge branch 'master' of https://github.com/mathuo/dockview

packages/dockview-core/src/__tests__/api/api.spec.ts

@@ -5,7 +5,7 @@ describe('api', () => {
     let api: PanelApiImpl;
 
     beforeEach(() => {
-        api = new PanelApiImpl('dummy_id');
+        api = new PanelApiImpl('dummy_id', 'fake-component');
     });
 
     test('updateParameters', () => {

packages/dockview-core/src/__tests__/api/dockviewPanelApi.spec.ts

@@ -31,7 +31,8 @@ describe('groupPanelApi', () => {
         const cut = new DockviewPanelApiImpl(
             panel,
             group,
-            <DockviewComponent>accessor
+            <DockviewComponent>accessor,
+            'fake-component'
         );
 
         cut.setTitle('test_title');
@@ -59,7 +60,8 @@ describe('groupPanelApi', () => {
         const cut = new DockviewPanelApiImpl(
             <DockviewPanel>groupPanel,
             <DockviewGroupPanel>groupViewPanel,
-            <DockviewComponent>accessor
+            <DockviewComponent>accessor,
+            'fake-component'
         );
 
         cut.updateParameters({ keyA: 'valueA' });
@@ -89,7 +91,8 @@ describe('groupPanelApi', () => {
         const cut = new DockviewPanelApiImpl(
             <DockviewPanel>groupPanel,
             <DockviewGroupPanel>groupViewPanel,
-            <DockviewComponent>accessor
+            <DockviewComponent>accessor,
+            'fake-component'
         );
 
         let events = 0;

packages/dockview-core/src/__tests__/dockview/dockviewComponent.spec.ts

@@ -8,7 +8,7 @@ import { PanelUpdateEvent } from '../../panel/types';
 import { Orientation } from '../../splitview/splitview';
 import { CompositeDisposable } from '../../lifecycle';
 import { Emitter } from '../../events';
-import { IDockviewPanel } from '../../dockview/dockviewPanel';
+import { DockviewPanel, IDockviewPanel } from '../../dockview/dockviewPanel';
 import { DockviewGroupPanel } from '../../dockview/dockviewGroupPanel';
 import { fireEvent } from '@testing-library/dom';
 import { getPanelData } from '../../dnd/dataTransfer';
@@ -4598,6 +4598,64 @@ describe('dockviewComponent', () => {
         });
     });
 
+    describe('that emits onDidLayoutChange', () => {
+        let dockview: DockviewComponent;
+        let panel1: DockviewPanel;
+
+        beforeEach(() => {
+            jest.useFakeTimers();
+
+            dockview = new DockviewComponent({
+                parentElement: container,
+                components: {
+                    default: PanelContentPartTest,
+                },
+                tabComponents: {
+                    test_tab_id: PanelTabPartTest,
+                },
+                orientation: Orientation.HORIZONTAL,
+            });
+
+            panel1 = dockview.addPanel({
+                id: 'panel_1',
+                component: 'default',
+            });
+        });
+
+        afterEach(() => {
+            jest.runAllTimers();
+            jest.useRealTimers();
+        });
+
+        test('that emits onDidPanelTitleChange and onDidLayoutChange when the panel set a title', () => {
+            const didLayoutChangeHandler = jest.fn();
+            const { dispose: disposeDidLayoutChangeHandler } =
+                dockview.onDidLayoutChange(didLayoutChangeHandler);
+
+            panel1.setTitle('new title');
+
+            jest.runAllTimers();
+
+            expect(didLayoutChangeHandler).toHaveBeenCalledTimes(1);
+
+            disposeDidLayoutChangeHandler();
+        });
+
+        test('that emits onDidPanelParametersChange and onDidLayoutChange when the panel updates parameters', () => {
+            const didLayoutChangeHandler = jest.fn();
+            const { dispose: disposeDidLayoutChangeHandler } =
+                dockview.onDidLayoutChange(didLayoutChangeHandler);
+
+            panel1.api.updateParameters({ keyA: 'valueA' });
+
+            jest.runAllTimers();
+
+            expect(didLayoutChangeHandler).toHaveBeenCalledTimes(1);
+
+            disposeDidLayoutChangeHandler();
+        });
+    });
+
     test('that setVisible toggles visiblity', () => {
         const container = document.createElement('div');
 

packages/dockview-core/src/__tests__/dockview/dockviewGroupPanelModel.spec.ts

@@ -9,19 +9,40 @@ import {
 } from '../../dockview/types';
 import { PanelUpdateEvent, Parameters } from '../../panel/types';
 import {
+    DockviewGroupLocation,
     DockviewGroupPanelModel,
     GroupOptions,
 } from '../../dockview/dockviewGroupPanelModel';
 import { fireEvent } from '@testing-library/dom';
 import { LocalSelectionTransfer, PanelTransfer } from '../../dnd/dataTransfer';
 import { CompositeDisposable } from '../../lifecycle';
-import { DockviewPanelApi } from '../../api/dockviewPanelApi';
+import {
+    ActiveGroupEvent,
+    DockviewPanelApi,
+    GroupChangedEvent,
+    RendererChangedEvent,
+} from '../../api/dockviewPanelApi';
 import { IDockviewPanel } from '../../dockview/dockviewPanel';
 import { IDockviewPanelModel } from '../../dockview/dockviewPanelModel';
 import { DockviewGroupPanel } from '../../dockview/dockviewGroupPanel';
 import { WatermarkRendererInitParameters } from '../../dockview/types';
 import { createOffsetDragOverEvent } from '../__test_utils__/utils';
-import { OverlayRenderContainer } from '../../overlayRenderContainer';
+import {
+    DockviewPanelRenderer,
+    OverlayRenderContainer,
+} from '../../overlayRenderContainer';
+import { DockviewGroupPanelFloatingChangeEvent } from '../../api/dockviewGroupPanelApi';
+import { SizeEvent } from '../../api/gridviewPanelApi';
+import {
+    PanelDimensionChangeEvent,
+    FocusEvent,
+    VisibilityEvent,
+    ActiveEvent,
+    WillFocusEvent,
+} from '../../api/panelApi';
+import { Position } from '../../dnd/droptarget';
+import { Emitter, Event } from '../../events';
+import { fromPartial } from '@total-typescript/shoehorn';
 
 enum GroupChangeKind2 {
     ADD_PANEL,
@@ -240,12 +261,20 @@ describe('dockviewGroupPanelModel', () => {
     let removePanelMock: jest.Mock;
     let removeGroupMock: jest.Mock;
 
+    let panelApi: DockviewPanelApi;
+
     beforeEach(() => {
         removePanelMock = jest.fn();
         removeGroupMock = jest.fn();
 
         options = {};
 
+        panelApi = fromPartial<DockviewPanelApi>({
+            renderer: 'onlyWhenVisibile',
+            onDidTitleChange: new Emitter().event,
+            onDidParametersChange: new Emitter().event,
+        });
+
         dockview = (<Partial<DockviewComponent>>{
             options: { parentElement: document.createElement('div') },
             createWatermarkComponent: () => new Watermark(),
@@ -265,15 +294,9 @@ describe('dockviewGroupPanelModel', () => {
     });
 
     test('panel events are captured during de-serialization', () => {
-        const panel1 = new TestPanel('panel1', {
+        const panel1 = new TestPanel('panel1', panelApi);
-            renderer: 'onlyWhenVisibile',
+        const panel2 = new TestPanel('panel2', panelApi);
-        } as any);
+        const panel3 = new TestPanel('panel3', panelApi);
-        const panel2 = new TestPanel('panel2', {
-            renderer: 'onlyWhenVisibile',
-        } as any);
-        const panel3 = new TestPanel('panel3', {
-            renderer: 'onlyWhenVisibile',
-        } as any);
 
         const groupview2 = new DockviewGroupPanel(dockview, 'groupview-2', {
             panels: [panel1, panel2, panel3],
@@ -357,15 +380,9 @@ describe('dockviewGroupPanelModel', () => {
             })
         );
 
-        const panel1 = new TestPanel('panel1', {
+        const panel1 = new TestPanel('panel1', panelApi);
-            renderer: 'onlyWhenVisibile',
+        const panel2 = new TestPanel('panel2', panelApi);
-        } as any);
+        const panel3 = new TestPanel('panel3', panelApi);
-        const panel2 = new TestPanel('panel2', {
-            renderer: 'onlyWhenVisibile',
-        } as any);
-        const panel3 = new TestPanel('panel3', {
-            renderer: 'onlyWhenVisibile',
-        } as any);
 
         expect(events.length).toBe(0);
 
@@ -443,15 +460,9 @@ describe('dockviewGroupPanelModel', () => {
     });
 
     test('moveToPrevious and moveToNext', () => {
-        const panel1 = new TestPanel('panel1', {
+        const panel1 = new TestPanel('panel1', panelApi);
-            renderer: 'onlyWhenVisibile',
+        const panel2 = new TestPanel('panel2', panelApi);
-        } as any);
+        const panel3 = new TestPanel('panel3', panelApi);
-        const panel2 = new TestPanel('panel2', {
-            renderer: 'onlyWhenVisibile',
-        } as any);
-        const panel3 = new TestPanel('panel3', {
-            renderer: 'onlyWhenVisibile',
-        } as any);
 
         groupview.model.openPanel(panel1);
         groupview.model.openPanel(panel2);
@@ -495,15 +506,9 @@ describe('dockviewGroupPanelModel', () => {
     });
 
     test('closeAllPanels with panels', () => {
-        const panel1 = new TestPanel('panel1', {
+        const panel1 = new TestPanel('panel1', panelApi);
-            renderer: 'onlyWhenVisibile',
+        const panel2 = new TestPanel('panel2', panelApi);
-        } as any);
+        const panel3 = new TestPanel('panel3', panelApi);
-        const panel2 = new TestPanel('panel2', {
-            renderer: 'onlyWhenVisibile',
-        } as any);
-        const panel3 = new TestPanel('panel3', {
-            renderer: 'onlyWhenVisibile',
-        } as any);
 
         groupview.model.openPanel(panel1);
         groupview.model.openPanel(panel2);
@@ -608,25 +613,19 @@ describe('dockviewGroupPanelModel', () => {
             .getElementsByClassName('content-container')
             .item(0)!.childNodes;
 
-        const panel1 = new TestPanel('id_1', {
+        const panel1 = new TestPanel('id_1', panelApi);
-            renderer: 'onlyWhenVisibile',
-        } as any);
 
         cut.openPanel(panel1);
         expect(contentContainer.length).toBe(1);
         expect(contentContainer.item(0)).toBe(panel1.view.content.element);
 
-        const panel2 = new TestPanel('id_2', {
+        const panel2 = new TestPanel('id_2', panelApi);
-            renderer: 'onlyWhenVisibile',
-        } as any);
 
         cut.openPanel(panel2);
         expect(contentContainer.length).toBe(1);
         expect(contentContainer.item(0)).toBe(panel2.view.content.element);
 
-        const panel3 = new TestPanel('id_2', {
+        const panel3 = new TestPanel('id_2', panelApi);
-            renderer: 'onlyWhenVisibile',
-        } as any);
 
         cut.openPanel(panel3, { skipSetActive: true });
         expect(contentContainer.length).toBe(1);
@@ -834,11 +833,7 @@ describe('dockviewGroupPanelModel', () => {
             new groupPanelMock() as DockviewGroupPanel
         );
 
-        cut.openPanel(
+        cut.openPanel(new TestPanel('panel1', panelApi));
-            new TestPanel('panel1', {
-                renderer: 'onlyWhenVisibile',
-            } as any)
-        );
 
         const element = container
             .getElementsByClassName('content-container')
@@ -908,16 +903,8 @@ describe('dockviewGroupPanelModel', () => {
             new groupPanelMock() as DockviewGroupPanel
         );
 
-        cut.openPanel(
+        cut.openPanel(new TestPanel('panel1', panelApi));
-            new TestPanel('panel1', {
+        cut.openPanel(new TestPanel('panel2', panelApi));
-                renderer: 'onlyWhenVisibile',
-            } as any)
-        );
-        cut.openPanel(
-            new TestPanel('panel2', {
-                renderer: 'onlyWhenVisibile',
-            } as any)
-        );
 
         const element = container
             .getElementsByClassName('content-container')
@@ -987,16 +974,8 @@ describe('dockviewGroupPanelModel', () => {
             new groupPanelMock() as DockviewGroupPanel
         );
 
-        cut.openPanel(
+        cut.openPanel(new TestPanel('panel1', panelApi));
-            new TestPanel('panel1', {
+        cut.openPanel(new TestPanel('panel2', panelApi));
-                renderer: 'onlyWhenVisibile',
-            } as any)
-        );
-        cut.openPanel(
-            new TestPanel('panel2', {
-                renderer: 'onlyWhenVisibile',
-            } as any)
-        );
 
         const element = container
             .getElementsByClassName('content-container')
@@ -1097,11 +1076,7 @@ describe('dockviewGroupPanelModel', () => {
             container.getElementsByClassName('watermark-test-container').length
         ).toBe(1);
 
-        cut.openPanel(
+        cut.openPanel(new TestPanel('panel1', panelApi));
-            new TestPanel('panel1', {
-                renderer: 'onlyWhenVisibile',
-            } as any)
-        );
 
         expect(
             container.getElementsByClassName('watermark-test-container').length
@@ -1111,11 +1086,7 @@ describe('dockviewGroupPanelModel', () => {
                 .length
         ).toBe(1);
 
-        cut.openPanel(
+        cut.openPanel(new TestPanel('panel2', panelApi));
-            new TestPanel('panel2', {
-                renderer: 'onlyWhenVisibile',
-            } as any)
-        );
 
         expect(
             container.getElementsByClassName('watermark-test-container').length
@@ -1133,11 +1104,7 @@ describe('dockviewGroupPanelModel', () => {
             container.getElementsByClassName('watermark-test-container').length
         ).toBe(1);
 
-        cut.openPanel(
+        cut.openPanel(new TestPanel('panel1', panelApi));
-            new TestPanel('panel1', {
-                renderer: 'onlyWhenVisibile',
-            } as any)
-        );
 
         expect(
             container.getElementsByClassName('watermark-test-container').length

packages/dockview-core/src/__tests__/dockview/dockviewPanel.spec.ts

@@ -34,9 +34,18 @@ describe('dockviewPanel', () => {
         });
         const model = <IDockviewPanelModel>new panelModelMock();
 
-        const cut = new DockviewPanel('fake-id', accessor, api, group, model, {
+        const cut = new DockviewPanel(
+            'fake-id',
+            'fake-component',
+            undefined,
+            accessor,
+            api,
+            group,
+            model,
+            {
                 renderer: 'onlyWhenVisibile',
-        });
+            }
+        );
 
         let latestTitle: string | undefined = undefined;
 
@@ -84,9 +93,18 @@ describe('dockviewPanel', () => {
         });
         const model = <IDockviewPanelModel>new panelModelMock();
 
-        const cut = new DockviewPanel('fake-id', accessor, api, group, model, {
+        const cut = new DockviewPanel(
+            'fake-id',
+            'fake-component',
+            undefined,
+            accessor,
+            api,
+            group,
+            model,
+            {
                 renderer: 'onlyWhenVisibile',
-        });
+            }
+        );
 
         cut.init({ title: 'myTitle', params: {} });
         expect(cut.title).toBe('myTitle');
@@ -130,9 +148,18 @@ describe('dockviewPanel', () => {
         });
         const model = <IDockviewPanelModel>new panelModelMock();
 
-        const cut = new DockviewPanel('fake-id', accessor, api, group, model, {
+        const cut = new DockviewPanel(
+            'fake-id',
+            'fake-component',
+            undefined,
+            accessor,
+            api,
+            group,
+            model,
+            {
                 renderer: 'onlyWhenVisibile',
-        });
+            }
+        );
 
         cut.init({ params: {}, title: 'title' });
 
@@ -167,9 +194,18 @@ describe('dockviewPanel', () => {
         });
         const model = <IDockviewPanelModel>new panelModelMock();
 
-        const cut = new DockviewPanel('fake-id', accessor, api, group, model, {
+        const cut = new DockviewPanel(
+            'fake-id',
+            'fake-component',
+            undefined,
+            accessor,
+            api,
+            group,
+            model,
+            {
                 renderer: 'onlyWhenVisibile',
-        });
+            }
+        );
 
         expect(cut.params).toEqual(undefined);
 
@@ -205,9 +241,18 @@ describe('dockviewPanel', () => {
         });
         const model = <IDockviewPanelModel>new panelModelMock();
 
-        const cut = new DockviewPanel('fake-id', accessor, api, group, model, {
+        const cut = new DockviewPanel(
+            'fake-id',
+            'fake-component',
+            undefined,
+            accessor,
+            api,
+            group,
+            model,
+            {
                 renderer: 'onlyWhenVisibile',
-        });
+            }
+        );
 
         cut.api.setSize({ height: 123, width: 456 });
 
@@ -241,9 +286,18 @@ describe('dockviewPanel', () => {
         });
         const model = <IDockviewPanelModel>new panelModelMock();
 
-        const cut = new DockviewPanel('fake-id', accessor, api, group, model, {
+        const cut = new DockviewPanel(
+            'fake-id',
+            'fake-component',
+            undefined,
+            accessor,
+            api,
+            group,
+            model,
+            {
                 renderer: 'onlyWhenVisibile',
-        });
+            }
+        );
 
         cut.init({ params: { a: '1', b: '2' }, title: 'A title' });
         expect(cut.params).toEqual({ a: '1', b: '2' });

packages/dockview-core/src/api/dockviewGroupPanelApi.ts

@@ -42,7 +42,7 @@ export class DockviewGroupPanelApiImpl extends GridviewPanelApiImpl {
     }
 
     constructor(id: string, private readonly accessor: DockviewComponent) {
-        super(id);
+        super(id, '__dockviewgroup__');
 
         this.addDisposables(this._onDidLocationChange);
     }

packages/dockview-core/src/api/dockviewPanelApi.ts

@@ -37,6 +37,7 @@ export interface DockviewPanelApi
     readonly title: string | undefined;
     readonly onDidActiveGroupChange: Event<ActiveGroupEvent>;
     readonly onDidGroupChange: Event<GroupChangedEvent>;
+    readonly onDidTitleChange: Event<TitleEvent>;
     readonly onDidRendererChange: Event<RendererChangedEvent>;
     readonly location: DockviewGroupLocation;
     readonly onDidLocationChange: Event<DockviewGroupPanelFloatingChangeEvent>;
@@ -62,6 +63,7 @@ export class DockviewPanelApiImpl
     implements DockviewPanelApi
 {
     private _group: DockviewGroupPanel;
+    private _tabComponent: string | undefined;
 
     readonly _onDidTitleChange = new Emitter<TitleEvent>();
     readonly onDidTitleChange = this._onDidTitleChange.event;
@@ -118,12 +120,20 @@ export class DockviewPanelApiImpl
         return this._group;
     }
 
+    get tabComponent(): string | undefined {
+        return this._tabComponent;
+    }
+
     constructor(
         private panel: DockviewPanel,
         group: DockviewGroupPanel,
-        private readonly accessor: DockviewComponent
+        private readonly accessor: DockviewComponent,
+        component: string,
+        tabComponent?: string
     ) {
-        super(panel.id);
+        super(panel.id, component);
+
+        this._tabComponent = tabComponent;
 
         this.initialize(panel);
 

packages/dockview-core/src/api/gridviewPanelApi.ts

@@ -44,8 +44,8 @@ export class GridviewPanelApiImpl
     private readonly _onDidSizeChange = new Emitter<SizeEvent>();
     readonly onDidSizeChange: Event<SizeEvent> = this._onDidSizeChange.event;
 
-    constructor(id: string, panel?: IPanel) {
+    constructor(id: string, component: string, panel?: IPanel) {
-        super(id);
+        super(id, component);
 
         this.addDisposables(
             this._onDidConstraintsChangeInternal,

packages/dockview-core/src/api/panelApi.ts

@@ -24,6 +24,7 @@ export interface PanelApi {
     readonly onDidFocusChange: Event<FocusEvent>;
     readonly onDidVisibilityChange: Event<VisibilityEvent>;
     readonly onDidActiveChange: Event<ActiveEvent>;
+    readonly onDidParametersChange: Event<Parameters>;
     setActive(): void;
     setVisible(isVisible: boolean): void;
     updateParameters(parameters: Parameters): void;
@@ -53,6 +54,8 @@ export interface PanelApi {
     readonly height: number;
 
     readonly onWillFocus: Event<WillFocusEvent>;
+
+    getParameters<T extends Parameters = Parameters>(): T;
 }
 
 export class WillFocusEvent extends DockviewEvent {
@@ -70,6 +73,7 @@ export class PanelApiImpl extends CompositeDisposable implements PanelApi {
     private _isVisible = true;
     private _width = 0;
     private _height = 0;
+    private _parameters: Parameters = {};
 
     private readonly panelUpdatesDisposable = new MutableDisposable();
 
@@ -97,9 +101,9 @@ export class PanelApiImpl extends CompositeDisposable implements PanelApi {
     readonly _onActiveChange = new Emitter<void>();
     readonly onActiveChange: Event<void> = this._onActiveChange.event;
 
-    readonly _onUpdateParameters = new Emitter<Parameters>();
+    readonly _onDidParametersChange = new Emitter<Parameters>();
-    readonly onUpdateParameters: Event<Parameters> =
+    readonly onDidParametersChange: Event<Parameters> =
-        this._onUpdateParameters.event;
+        this._onDidParametersChange.event;
 
     get isFocused(): boolean {
         return this._isFocused;
@@ -121,7 +125,7 @@ export class PanelApiImpl extends CompositeDisposable implements PanelApi {
         return this._height;
     }
 
-    constructor(readonly id: string) {
+    constructor(readonly id: string, readonly component: string) {
         super();
 
         this.addDisposables(
@@ -145,16 +149,20 @@ export class PanelApiImpl extends CompositeDisposable implements PanelApi {
             this._onDidActiveChange,
             this._onWillFocus,
             this._onActiveChange,
-            this._onUpdateParameters,
             this._onWillFocus,
             this._onWillVisibilityChange,
-            this._onUpdateParameters
+            this._onDidParametersChange
         );
     }
 
+    getParameters<T extends Parameters = Parameters>(): T {
+        return this._parameters as T;
+    }
+
     public initialize(panel: IPanel): void {
-        this.panelUpdatesDisposable.value = this._onUpdateParameters.event(
+        this.panelUpdatesDisposable.value = this._onDidParametersChange.event(
             (parameters) => {
+                this._parameters = parameters;
                 panel.update({
                     params: parameters,
                 });
@@ -171,6 +179,6 @@ export class PanelApiImpl extends CompositeDisposable implements PanelApi {
     }
 
     updateParameters(parameters: Parameters): void {
-        this._onUpdateParameters.fire(parameters);
+        this._onDidParametersChange.fire(parameters);
     }
 }

packages/dockview-core/src/api/paneviewPanelApi.ts

@@ -35,8 +35,8 @@ export class PaneviewPanelApiImpl
         this._pane = pane;
     }
 
-    constructor(id: string) {
+    constructor(id: string, component: string) {
-        super(id);
+        super(id, component);
 
         this.addDisposables(
             this._onDidExpansionChange,

packages/dockview-core/src/api/splitviewPanelApi.ts

@@ -45,8 +45,8 @@ export class SplitviewPanelApiImpl
         this._onDidSizeChange.event;
     //
 
-    constructor(id: string) {
+    constructor(id: string, component: string) {
-        super(id);
+        super(id, component);
 
         this.addDisposables(
             this._onDidConstraintsChangeInternal,

packages/dockview-core/src/dockview/deserializer.ts

@@ -49,6 +49,8 @@ export class DefaultDockviewDeserialzier implements IPanelDeserializer {
 
         const panel = new DockviewPanel(
             panelId,
+            contentComponent,
+            tabComponent,
             this.accessor,
             new DockviewApi(this.accessor),
             group,

packages/dockview-core/src/dockview/dockviewComponent.ts

@@ -65,6 +65,7 @@ import {
     OverlayRenderContainer,
 } from '../overlayRenderContainer';
 import { PopoutWindow } from '../popoutWindow';
+import { TitleEvent } from '../api/dockviewPanelApi';
 
 const DEFAULT_ROOT_OVERLAY_MODEL: DroptargetOverlayModel = {
     activationSize: { type: 'pixels', value: 10 },
@@ -2175,6 +2176,12 @@ export class DockviewComponent
                     if (this._onDidActivePanelChange.value !== event.panel) {
                         this._onDidActivePanelChange.fire(event.panel);
                     }
+                }),
+                Event.any(
+                    view.model.onDidPanelTitleChange,
+                    view.model.onDidPanelParametersChange
+                )(() => {
+                    this._bufferOnDidLayoutChange.fire();
                 })
             );
 
@@ -2204,6 +2211,8 @@ export class DockviewComponent
 
         const panel = new DockviewPanel(
             options.id,
+            contentComponent,
+            tabComponent,
             this,
             this._api,
             group,

packages/dockview-core/src/dockview/dockviewGroupPanelModel.ts

@@ -11,8 +11,13 @@ import {
     IDockviewEvent,
 } from '../events';
 import { IViewSize } from '../gridview/gridview';
-import { CompositeDisposable } from '../lifecycle';
+import { CompositeDisposable, IDisposable } from '../lifecycle';
-import { IPanel, PanelInitParameters, PanelUpdateEvent } from '../panel/types';
+import {
+    IPanel,
+    PanelInitParameters,
+    PanelUpdateEvent,
+    Parameters,
+} from '../panel/types';
 import {
     ContentContainer,
     IContentContainer,
@@ -28,6 +33,7 @@ import { DockviewGroupPanel } from './dockviewGroupPanel';
 import { IDockviewPanel } from './dockviewPanel';
 import { IHeaderActionsRenderer } from './options';
 import { OverlayRenderContainer } from '../overlayRenderContainer';
+import { TitleEvent } from '../api/dockviewPanelApi';
 
 interface GroupMoveEvent {
     groupId: string;
@@ -245,6 +251,7 @@ export class DockviewGroupPanelModel
     private _height = 0;
 
     private _panels: IDockviewPanel[] = [];
+    private readonly _panelDisposables = new Map<string, IDisposable>();
 
     private readonly _onMove = new Emitter<GroupMoveEvent>();
     readonly onMove: Event<GroupMoveEvent> = this._onMove.event;
@@ -271,6 +278,14 @@ export class DockviewGroupPanelModel
     readonly onDidAddPanel: Event<DockviewGroupChangeEvent> =
         this._onDidAddPanel.event;
 
+    private readonly _onDidPanelTitleChange = new Emitter<TitleEvent>();
+    readonly onDidPanelTitleChange: Event<TitleEvent> =
+        this._onDidPanelTitleChange.event;
+
+    private readonly _onDidPanelParametersChange = new Emitter<Parameters>();
+    readonly onDidPanelParametersChange: Event<Parameters> =
+        this._onDidPanelParametersChange.event;
+
     private readonly _onDidRemovePanel =
         new Emitter<DockviewGroupChangeEvent>();
     readonly onDidRemovePanel: Event<DockviewGroupChangeEvent> =
@@ -826,6 +841,12 @@ export class DockviewGroupPanelModel
             );
         }
 
+        const disposable = this._panelDisposables.get(panel.id);
+        if (disposable) {
+            disposable.dispose();
+            this._panelDisposables.delete(panel.id);
+        }
+
         this._onDidRemovePanel.fire({ panel });
     }
 
@@ -856,6 +877,18 @@ export class DockviewGroupPanelModel
         this.updateMru(panel);
         this.panels.splice(index, 0, panel);
 
+        this._panelDisposables.set(
+            panel.id,
+            new CompositeDisposable(
+                panel.api.onDidTitleChange((event) =>
+                    this._onDidPanelTitleChange.fire(event)
+                ),
+                panel.api.onDidParametersChange((event) =>
+                    this._onDidPanelParametersChange.fire(event)
+                )
+            )
+        );
+
         this._onDidAddPanel.fire({ panel });
     }
 

packages/dockview-core/src/dockview/dockviewPanel.ts

@@ -58,6 +58,8 @@ export class DockviewPanel
 
     constructor(
         public readonly id: string,
+        component: string,
+        tabComponent: string | undefined,
         private readonly accessor: DockviewComponent,
         private readonly containerApi: DockviewApi,
         group: DockviewGroupPanel,
@@ -68,7 +70,13 @@ export class DockviewPanel
         this._renderer = options.renderer;
         this._group = group;
 
-        this.api = new DockviewPanelApiImpl(this, this._group, accessor);
+        this.api = new DockviewPanelApiImpl(
+            this,
+            this._group,
+            accessor,
+            component,
+            tabComponent
+        );
 
         this.addDisposables(
             this.api.onActiveChange(() => {

packages/dockview-core/src/gridview/gridviewPanel.ts

@@ -140,7 +140,7 @@ export abstract class GridviewPanel<
         },
         api?: T
     ) {
-        super(id, component, api ?? <T>new GridviewPanelApiImpl(id));
+        super(id, component, api ?? <T>new GridviewPanelApiImpl(id, component));
 
         if (typeof options?.minimumWidth === 'number') {
             this._minimumWidth = options.minimumWidth;

packages/dockview-core/src/paneview/paneviewPanel.ts

@@ -164,7 +164,7 @@ export abstract class PaneviewPanel
         isExpanded: boolean,
         isHeaderVisible: boolean
     ) {
-        super(id, component, new PaneviewPanelApiImpl(id));
+        super(id, component, new PaneviewPanelApiImpl(id, component));
         this.api.pane = this; // TODO cannot use 'this' before 'super'
         this.api.initialize(this);
 

packages/dockview-core/src/splitview/splitviewPanel.ts

@@ -83,7 +83,7 @@ export abstract class SplitviewPanel
     }
 
     constructor(id: string, componentName: string) {
-        super(id, componentName, new SplitviewPanelApiImpl(id));
+        super(id, componentName, new SplitviewPanelApiImpl(id, componentName));
 
         this.api.initialize(this);