Mercurial > hg > orthanc-stone
annotate Platforms/Wasm/wasm-viewport.ts @ 454:50229f6eb4cd
TS: one touch drag is not equivalent to left mouse drag instead of middle mouse drag
| author | Alain Mazy <alain@mazy.be> |
|---|---|
| date | Fri, 18 Jan 2019 11:52:10 +0100 |
| parents | 59b4afa92dee |
| children | 3b4df9925db6 7cdb4634846c |
| rev | line source |
|---|---|
| 230 | 1 var isPendingRedraw = false; |
| 229 | 2 |
| 230 | 3 function ScheduleWebViewportRedraw(cppViewportHandle: any) : void |
| 4 { | |
| 5 if (!isPendingRedraw) { | |
| 6 isPendingRedraw = true; | |
| 7 console.log('Scheduling a refresh of the viewport, as its content changed'); | |
| 8 window.requestAnimationFrame(function() { | |
| 9 isPendingRedraw = false; | |
| 10 Stone.WasmViewport.GetFromCppViewport(cppViewportHandle).Redraw(); | |
| 11 }); | |
| 229 | 12 } |
| 230 | 13 } |
| 226 | 14 |
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15 declare function UTF8ToString(any): string; |
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16 |
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17 function CreateWasmViewport(htmlCanvasId: string) : any { |
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18 var cppViewportHandle = CreateCppViewport(); |
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19 var canvasId = UTF8ToString(htmlCanvasId); |
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20 var webViewport = new Stone.WasmViewport(StoneFrameworkModule, canvasId, cppViewportHandle); // viewports are stored in a static map in WasmViewport -> won't be deleted |
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21 webViewport.Initialize(); |
| 314 | 22 |
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23 return cppViewportHandle; |
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24 } |
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25 |
| 226 | 26 module Stone { |
| 27 | |
| 28 // export declare type InitializationCallback = () => void; | |
| 29 | |
| 30 // export declare var StoneFrameworkModule : any; | |
| 31 | |
| 32 //const ASSETS_FOLDER : string = "assets/lib"; | |
| 33 //const WASM_FILENAME : string = "orthanc-framework"; | |
| 229 | 34 |
| 226 | 35 export class WasmViewport { |
| 36 | |
| 313 | 37 private static viewportsMapByCppHandle_ : Map<number, WasmViewport> = new Map<number, WasmViewport>(); // key = the C++ handle |
| 38 private static viewportsMapByCanvasId_ : Map<string, WasmViewport> = new Map<string, WasmViewport>(); // key = the canvasId | |
| 229 | 39 |
| 226 | 40 private module_ : any; |
| 41 private canvasId_ : string; | |
| 42 private htmlCanvas_ : HTMLCanvasElement; | |
| 43 private context_ : CanvasRenderingContext2D; | |
| 44 private imageData_ : any = null; | |
| 45 private renderingBuffer_ : any = null; | |
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46 |
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47 private touchGestureInProgress_: boolean = false; |
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48 private touchCount_: number = 0; |
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49 private touchGestureLastCoordinates_: [number, number][] = []; // last x,y coordinates of each touch |
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50 |
| 226 | 51 private touchZoom_ : any = false; |
| 52 private touchTranslation_ : any = false; | |
| 53 | |
| 54 private ViewportSetSize : Function; | |
| 55 private ViewportRender : Function; | |
| 56 private ViewportMouseDown : Function; | |
| 57 private ViewportMouseMove : Function; | |
| 58 private ViewportMouseUp : Function; | |
| 59 private ViewportMouseEnter : Function; | |
| 60 private ViewportMouseLeave : Function; | |
| 61 private ViewportMouseWheel : Function; | |
| 62 private ViewportKeyPressed : Function; | |
| 63 | |
| 227 | 64 private pimpl_ : any; // Private pointer to the underlying WebAssembly C++ object |
| 65 | |
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66 public constructor(module: any, canvasId: string, cppViewport: any) { |
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67 |
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68 this.pimpl_ = cppViewport; |
| 313 | 69 WasmViewport.viewportsMapByCppHandle_[this.pimpl_] = this; |
| 70 WasmViewport.viewportsMapByCanvasId_[canvasId] = this; | |
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71 |
| 226 | 72 this.module_ = module; |
| 73 this.canvasId_ = canvasId; | |
| 74 this.htmlCanvas_ = document.getElementById(this.canvasId_) as HTMLCanvasElement; | |
| 244 | 75 if (this.htmlCanvas_ == null) { |
| 76 console.log("Can not create WasmViewport, did not find the canvas whose id is '", this.canvasId_, "'"); | |
| 77 } | |
| 226 | 78 this.context_ = this.htmlCanvas_.getContext('2d'); |
| 79 | |
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80 this.ViewportSetSize = this.module_.cwrap('ViewportSetSize', null, [ 'number', 'number', 'number' ]); |
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81 this.ViewportRender = this.module_.cwrap('ViewportRender', null, [ 'number', 'number', 'number', 'number' ]); |
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82 this.ViewportMouseDown = this.module_.cwrap('ViewportMouseDown', null, [ 'number', 'number', 'number', 'number', 'number' ]); |
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83 this.ViewportMouseMove = this.module_.cwrap('ViewportMouseMove', null, [ 'number', 'number', 'number' ]); |
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84 this.ViewportMouseUp = this.module_.cwrap('ViewportMouseUp', null, [ 'number' ]); |
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85 this.ViewportMouseEnter = this.module_.cwrap('ViewportMouseEnter', null, [ 'number' ]); |
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86 this.ViewportMouseLeave = this.module_.cwrap('ViewportMouseLeave', null, [ 'number' ]); |
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87 this.ViewportMouseWheel = this.module_.cwrap('ViewportMouseWheel', null, [ 'number', 'number', 'number', 'number', 'number' ]); |
| 327 | 88 this.ViewportKeyPressed = this.module_.cwrap('ViewportKeyPressed', null, [ 'number', 'number', 'string', 'number', 'number' ]); |
| 228 | 89 } |
| 90 | |
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91 public GetCppViewport() : number { |
| 228 | 92 return this.pimpl_; |
| 226 | 93 } |
| 94 | |
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95 public static GetFromCppViewport(cppViewportHandle: number) : WasmViewport { |
| 313 | 96 if (WasmViewport.viewportsMapByCppHandle_[cppViewportHandle] !== undefined) { |
| 97 return WasmViewport.viewportsMapByCppHandle_[cppViewportHandle]; | |
| 98 } | |
| 99 console.log("WasmViewport not found !"); | |
| 100 return undefined; | |
| 101 } | |
| 102 | |
| 103 public static GetFromCanvasId(canvasId: string) : WasmViewport { | |
| 104 if (WasmViewport.viewportsMapByCanvasId_[canvasId] !== undefined) { | |
| 105 return WasmViewport.viewportsMapByCanvasId_[canvasId]; | |
| 229 | 106 } |
| 107 console.log("WasmViewport not found !"); | |
| 108 return undefined; | |
| 109 } | |
| 110 | |
| 314 | 111 public static ResizeAll() { |
| 112 for (let canvasId in WasmViewport.viewportsMapByCanvasId_) { | |
| 113 WasmViewport.viewportsMapByCanvasId_[canvasId].Resize(); | |
| 114 } | |
| 115 } | |
| 116 | |
| 226 | 117 public Redraw() { |
| 118 if (this.imageData_ === null || | |
| 119 this.renderingBuffer_ === null || | |
| 227 | 120 this.ViewportRender(this.pimpl_, |
| 121 this.imageData_.width, | |
| 226 | 122 this.imageData_.height, |
| 123 this.renderingBuffer_) == 0) { | |
| 124 console.log('The rendering has failed'); | |
| 125 } else { | |
| 126 // Create an accessor to the rendering buffer (i.e. create a | |
| 127 // "window" above the heap of the WASM module), then copy it to | |
| 128 // the ImageData object | |
| 129 this.imageData_.data.set(new Uint8ClampedArray( | |
| 130 this.module_.buffer, | |
| 131 this.renderingBuffer_, | |
| 132 this.imageData_.width * this.imageData_.height * 4)); | |
| 133 | |
| 134 this.context_.putImageData(this.imageData_, 0, 0); | |
| 135 } | |
| 136 } | |
| 137 | |
| 138 public Resize() { | |
| 139 if (this.imageData_ != null && | |
| 140 (this.imageData_.width != window.innerWidth || | |
| 141 this.imageData_.height != window.innerHeight)) { | |
| 142 this.imageData_ = null; | |
| 143 } | |
| 144 | |
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145 // width/height is defined by the parent width/height |
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146 this.htmlCanvas_.width = this.htmlCanvas_.parentElement.offsetWidth; |
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147 this.htmlCanvas_.height = this.htmlCanvas_.parentElement.offsetHeight; |
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148 |
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149 console.log("resizing WasmViewport: ", this.htmlCanvas_.width, "x", this.htmlCanvas_.height); |
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150 |
| 226 | 151 if (this.imageData_ === null) { |
| 152 this.imageData_ = this.context_.getImageData(0, 0, this.htmlCanvas_.width, this.htmlCanvas_.height); | |
| 228 | 153 this.ViewportSetSize(this.pimpl_, this.htmlCanvas_.width, this.htmlCanvas_.height); |
| 226 | 154 |
| 155 if (this.renderingBuffer_ != null) { | |
| 156 this.module_._free(this.renderingBuffer_); | |
| 157 } | |
| 158 | |
| 159 this.renderingBuffer_ = this.module_._malloc(this.imageData_.width * this.imageData_.height * 4); | |
| 313 | 160 } else { |
| 161 this.ViewportSetSize(this.pimpl_, this.htmlCanvas_.width, this.htmlCanvas_.height); | |
| 226 | 162 } |
| 163 | |
| 164 this.Redraw(); | |
| 165 } | |
| 166 | |
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167 public Initialize() { |
| 227 | 168 |
| 169 // Force the rendering of the viewport for the first time | |
| 170 this.Resize(); | |
| 226 | 171 |
| 228 | 172 var that : WasmViewport = this; |
| 227 | 173 // Register an event listener to call the Resize() function |
| 174 // each time the window is resized. | |
| 228 | 175 window.addEventListener('resize', function(event) { |
| 176 that.Resize(); | |
| 177 }, false); | |
| 226 | 178 |
| 227 | 179 this.htmlCanvas_.addEventListener('contextmenu', function(event) { |
| 180 // Prevent right click on the canvas | |
| 181 event.preventDefault(); | |
| 182 }, false); | |
| 183 | |
| 184 this.htmlCanvas_.addEventListener('mouseleave', function(event) { | |
| 228 | 185 that.ViewportMouseLeave(that.pimpl_); |
| 227 | 186 }); |
| 187 | |
| 188 this.htmlCanvas_.addEventListener('mouseenter', function(event) { | |
| 228 | 189 that.ViewportMouseEnter(that.pimpl_); |
| 227 | 190 }); |
| 191 | |
| 192 this.htmlCanvas_.addEventListener('mousedown', function(event) { | |
| 193 var x = event.pageX - this.offsetLeft; | |
| 194 var y = event.pageY - this.offsetTop; | |
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195 that.ViewportMouseDown(that.pimpl_, event.button, x, y, 0 /* TODO detect modifier keys*/); |
| 227 | 196 }); |
| 197 | |
| 198 this.htmlCanvas_.addEventListener('mousemove', function(event) { | |
| 199 var x = event.pageX - this.offsetLeft; | |
| 200 var y = event.pageY - this.offsetTop; | |
| 228 | 201 that.ViewportMouseMove(that.pimpl_, x, y); |
| 227 | 202 }); |
| 203 | |
| 204 this.htmlCanvas_.addEventListener('mouseup', function(event) { | |
| 228 | 205 that.ViewportMouseUp(that.pimpl_); |
| 227 | 206 }); |
| 207 | |
| 208 window.addEventListener('keydown', function(event) { | |
| 327 | 209 var keyChar = event.key; |
| 210 var keyCode = event.keyCode | |
| 211 if (keyChar.length == 1) { | |
| 212 keyCode = 0; // maps to OrthancStone::KeyboardKeys_Generic | |
| 213 } else { | |
| 214 keyChar = null; | |
| 215 } | |
| 216 // console.log("key: ", keyCode, keyChar); | |
| 217 that.ViewportKeyPressed(that.pimpl_, keyCode, keyChar, event.shiftKey, event.ctrlKey, event.altKey); | |
| 227 | 218 }); |
| 226 | 219 |
| 227 | 220 this.htmlCanvas_.addEventListener('wheel', function(event) { |
| 221 var x = event.pageX - this.offsetLeft; | |
| 222 var y = event.pageY - this.offsetTop; | |
| 228 | 223 that.ViewportMouseWheel(that.pimpl_, event.deltaY, x, y, event.ctrlKey); |
| 227 | 224 event.preventDefault(); |
| 225 }); | |
| 226 | |
| 227 this.htmlCanvas_.addEventListener('touchstart', function(event) { | |
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228 // don't propagate events to the whole body (this could zoom the entire page instead of zooming the viewport) |
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229 event.preventDefault(); |
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230 event.stopPropagation(); |
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231 |
| 227 | 232 that.ResetTouch(); |
| 233 }); | |
| 234 | |
| 235 this.htmlCanvas_.addEventListener('touchend', function(event) { | |
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236 // don't propagate events to the whole body (this could zoom the entire page instead of zooming the viewport) |
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237 event.preventDefault(); |
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238 event.stopPropagation(); |
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239 |
| 227 | 240 that.ResetTouch(); |
| 241 }); | |
| 242 | |
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243 this.htmlCanvas_.addEventListener('touchmove', function(event: TouchEvent) { |
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244 |
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245 // don't propagate events to the whole body (this could zoom the entire page instead of zooming the viewport) |
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246 event.preventDefault(); |
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247 event.stopPropagation(); |
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248 |
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249 // if (!that.touchGestureInProgress_) { |
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250 // // starting a new gesture |
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251 // that.touchCount_ = event.targetTouches.length; |
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252 // for (var t = 0; t < event.targetTouches.length; t++) { |
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253 // that.touchGestureLastCoordinates_.push([event.targetTouches[t].pageX, event.targetTouches[t].pageY]); |
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254 // } |
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255 // that.touchGestureInProgress_ = true; |
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256 // } else { |
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257 // // continuing a gesture |
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258 // // TODO: we shall probably forward all touches to the C++ code and let the "interactors/trackers" handle them |
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259 |
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260 // if (that.touchCount_ == 1) { // consider it's a left mouse drag |
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261 |
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262 // } |
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263 // } |
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264 |
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265 // TODO: we shall probably forward all touches to the C++ code and let the "interactors/trackers" handle them |
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TS: one touch drag is not equivalent to left mouse drag instead of middle mouse drag
Alain Mazy <alain@mazy.be>
parents:
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diff
changeset
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266 |
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50229f6eb4cd
TS: one touch drag is not equivalent to left mouse drag instead of middle mouse drag
Alain Mazy <alain@mazy.be>
parents:
453
diff
changeset
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267 if (that.touchTranslation_.length == 2) { // |
| 227 | 268 var t = that.GetTouchTranslation(event); |
| 228 | 269 that.ViewportMouseMove(that.pimpl_, t[0], t[1]); |
| 227 | 270 } |
| 271 else if (that.touchZoom_.length == 3) { | |
| 226 | 272 var z0 = that.touchZoom_; |
| 227 | 273 var z1 = that.GetTouchZoom(event); |
| 228 | 274 that.ViewportMouseMove(that.pimpl_, z0[0], z0[1] - z0[2] + z1[2]); |
| 227 | 275 } |
| 276 else { | |
| 277 // Realize the gesture event | |
| 278 if (event.targetTouches.length == 1) { | |
| 279 // Exactly one finger inside the canvas => Setup a translation | |
| 280 that.touchTranslation_ = that.GetTouchTranslation(event); | |
| 228 | 281 that.ViewportMouseDown(that.pimpl_, |
|
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50229f6eb4cd
TS: one touch drag is not equivalent to left mouse drag instead of middle mouse drag
Alain Mazy <alain@mazy.be>
parents:
453
diff
changeset
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282 0 /* left button */, |
| 227 | 283 that.touchTranslation_[0], |
| 284 that.touchTranslation_[1], 0); | |
| 285 } else if (event.targetTouches.length == 2) { | |
| 286 // Exactly 2 fingers inside the canvas => Setup a pinch/zoom | |
| 287 that.touchZoom_ = that.GetTouchZoom(event); | |
| 288 var z0 = that.touchZoom_; | |
| 228 | 289 that.ViewportMouseDown(that.pimpl_, |
| 290 2 /* right button */, | |
| 227 | 291 z0[0], |
| 292 z0[1], 0); | |
| 293 } | |
| 294 } | |
| 295 }); | |
| 296 } | |
| 226 | 297 |
| 298 public ResetTouch() { | |
| 227 | 299 if (this.touchTranslation_ || |
| 300 this.touchZoom_) { | |
| 228 | 301 this.ViewportMouseUp(this.pimpl_); |
| 226 | 302 } |
| 227 | 303 |
| 304 this.touchTranslation_ = false; | |
| 305 this.touchZoom_ = false; | |
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50229f6eb4cd
TS: one touch drag is not equivalent to left mouse drag instead of middle mouse drag
Alain Mazy <alain@mazy.be>
parents:
453
diff
changeset
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306 |
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50229f6eb4cd
TS: one touch drag is not equivalent to left mouse drag instead of middle mouse drag
Alain Mazy <alain@mazy.be>
parents:
453
diff
changeset
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307 // this.touchGestureInProgress_ = false; |
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50229f6eb4cd
TS: one touch drag is not equivalent to left mouse drag instead of middle mouse drag
Alain Mazy <alain@mazy.be>
parents:
453
diff
changeset
|
308 // this.touchCount_ = 0; |
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50229f6eb4cd
TS: one touch drag is not equivalent to left mouse drag instead of middle mouse drag
Alain Mazy <alain@mazy.be>
parents:
453
diff
changeset
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309 // this.touchGestureLastCoordinates_ = []; |
| 227 | 310 } |
| 226 | 311 |
| 312 public GetTouchTranslation(event) { | |
| 227 | 313 var touch = event.targetTouches[0]; |
| 314 return [ | |
| 315 touch.pageX, | |
| 316 touch.pageY | |
| 317 ]; | |
| 318 } | |
| 226 | 319 |
| 320 public GetTouchZoom(event) { | |
| 227 | 321 var touch1 = event.targetTouches[0]; |
| 322 var touch2 = event.targetTouches[1]; | |
| 323 var dx = (touch1.pageX - touch2.pageX); | |
| 324 var dy = (touch1.pageY - touch2.pageY); | |
| 325 var d = Math.sqrt(dx * dx + dy * dy); | |
| 326 return [ | |
| 327 (touch1.pageX + touch2.pageX) / 2.0, | |
| 328 (touch1.pageY + touch2.pageY) / 2.0, | |
| 329 d | |
| 330 ]; | |
| 331 } | |
| 226 | 332 |
| 227 | 333 } |
| 226 | 334 } |
| 335 |