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1 /* | 1 /* |
2 * Copyright (C) 2009 Google Inc. All rights reserved. | 2 * Copyright (C) 2009 Google Inc. All rights reserved. |
3 * | 3 * |
4 * Redistribution and use in source and binary forms, with or without | 4 * Redistribution and use in source and binary forms, with or without |
5 * modification, are permitted provided that the following conditions are | 5 * modification, are permitted provided that the following conditions are |
6 * met: | 6 * met: |
7 * | 7 * |
8 * * Redistributions of source code must retain the above copyright | 8 * * Redistributions of source code must retain the above copyright |
9 * notice, this list of conditions and the following disclaimer. | 9 * notice, this list of conditions and the following disclaimer. |
10 * * Redistributions in binary form must reproduce the above | 10 * * Redistributions in binary form must reproduce the above |
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355 | 355 |
356 // See comment at the top of the file for why an int is used here. | 356 // See comment at the top of the file for why an int is used here. |
357 int scrollByPage; | 357 int scrollByPage; |
358 | 358 |
359 // See comment at the top of the file for why an int is used here. | 359 // See comment at the top of the file for why an int is used here. |
360 int hasPreciseScrollingDeltas; | 360 int hasPreciseScrollingDeltas; |
361 Phase phase; | 361 Phase phase; |
362 Phase momentumPhase; | 362 Phase momentumPhase; |
363 | 363 |
364 // See comment at the top of the file for why an int is used here. | 364 // See comment at the top of the file for why an int is used here. |
| 365 // When false, this wheel event should not trigger scrolling (or any other d
efault |
| 366 // action) if the event goes unhandled by JavaScript. This is used, for exam
ple, |
| 367 // when the browser decides the default behavior for Ctrl+Wheel should be to
zoom |
| 368 // instead of scroll. |
| 369 int canScroll; |
| 370 |
| 371 // See comment at the top of the file for why an int is used here. |
365 // Rubberbanding is an OSX visual effect. When a user scrolls the content | 372 // Rubberbanding is an OSX visual effect. When a user scrolls the content |
366 // area with a track pad, and the content area is already at its limit in | 373 // area with a track pad, and the content area is already at its limit in |
367 // the direction being scrolled, the entire content area is allowed to | 374 // the direction being scrolled, the entire content area is allowed to |
368 // scroll slightly off screen, revealing a grey background. When the user | 375 // scroll slightly off screen, revealing a grey background. When the user |
369 // lets go, the content area snaps back into place. Blink is responsible | 376 // lets go, the content area snaps back into place. Blink is responsible |
370 // for this rubberbanding effect, but the embedder may wish to disable | 377 // for this rubberbanding effect, but the embedder may wish to disable |
371 // rubber banding in the left or right direction, if the scroll should have | 378 // rubber banding in the left or right direction, if the scroll should have |
372 // an alternate effect. The common case is that a scroll in the left or | 379 // an alternate effect. The common case is that a scroll in the left or |
373 // right directions causes a back or forwards navigation, respectively. | 380 // right directions causes a back or forwards navigation, respectively. |
374 // | 381 // |
375 // These flags prevent rubber banding from starting in a given direction, | 382 // These flags prevent rubber banding from starting in a given direction, |
376 // but have no effect on an ongoing rubber banding. A rubber banding that | 383 // but have no effect on an ongoing rubber banding. A rubber banding that |
377 // started in the vertical direction is allowed to continue in the right | 384 // started in the vertical direction is allowed to continue in the right |
378 // direction, even if canRubberbandRight is 0. | 385 // direction, even if canRubberbandRight is 0. |
379 int canRubberbandLeft; | 386 int canRubberbandLeft; |
380 int canRubberbandRight; | 387 int canRubberbandRight; |
381 | 388 |
382 WebMouseWheelEvent() | 389 WebMouseWheelEvent() |
383 : WebMouseEvent(sizeof(WebMouseWheelEvent)) | 390 : WebMouseEvent(sizeof(WebMouseWheelEvent)) |
384 , deltaX(0.0f) | 391 , deltaX(0.0f) |
385 , deltaY(0.0f) | 392 , deltaY(0.0f) |
386 , wheelTicksX(0.0f) | 393 , wheelTicksX(0.0f) |
387 , wheelTicksY(0.0f) | 394 , wheelTicksY(0.0f) |
388 , accelerationRatioX(1.0f) | 395 , accelerationRatioX(1.0f) |
389 , accelerationRatioY(1.0f) | 396 , accelerationRatioY(1.0f) |
390 , scrollByPage(false) | 397 , scrollByPage(false) |
391 , hasPreciseScrollingDeltas(false) | 398 , hasPreciseScrollingDeltas(false) |
392 , phase(PhaseNone) | 399 , phase(PhaseNone) |
393 , momentumPhase(PhaseNone) | 400 , momentumPhase(PhaseNone) |
| 401 , canScroll(true) |
394 , canRubberbandLeft(true) | 402 , canRubberbandLeft(true) |
395 , canRubberbandRight(true) | 403 , canRubberbandRight(true) |
396 { | 404 { |
397 } | 405 } |
398 }; | 406 }; |
399 | 407 |
400 // WebGestureEvent -------------------------------------------------------------
- | 408 // WebGestureEvent -------------------------------------------------------------
- |
401 | 409 |
402 class WebGestureEvent : public WebInputEvent { | 410 class WebGestureEvent : public WebInputEvent { |
403 public: | 411 public: |
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511 , causesScrollingIfUncanceled(false) | 519 , causesScrollingIfUncanceled(false) |
512 { | 520 { |
513 } | 521 } |
514 }; | 522 }; |
515 | 523 |
516 #pragma pack(pop) | 524 #pragma pack(pop) |
517 | 525 |
518 } // namespace blink | 526 } // namespace blink |
519 | 527 |
520 #endif | 528 #endif |
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