layout/xul/nsScrollbarButtonFrame.h

   1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* vim: set ts=8 sts=2 et sw=2 tw=80: */
   3 /* This Source Code Form is subject to the terms of the Mozilla Public
   4  * License, v. 2.0. If a copy of the MPL was not distributed with this
   5  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   6
   7 /**
   8
   9   Eric D Vaughan
  10   This class lays out its children either vertically or horizontally
  11
  12 **/
  13
  14 #ifndef nsScrollbarButtonFrame_h___
  15 #define nsScrollbarButtonFrame_h___
  16
  17 #include "SimpleXULLeafFrame.h"
  18 #include "mozilla/Attributes.h"
  19 #include "nsLeafFrame.h"
  20 #include "nsRepeatService.h"
  21
  22 namespace mozilla {
  23 class PresShell;
  24 }  // namespace mozilla
  25
  26 class nsScrollbarButtonFrame final : public mozilla::SimpleXULLeafFrame {
  27  public:
  28   NS_DECL_FRAMEARENA_HELPERS(nsScrollbarButtonFrame)
  29
  30   explicit nsScrollbarButtonFrame(ComputedStyle* aStyle,
  31                                   nsPresContext* aPresContext)
  32       : mozilla::SimpleXULLeafFrame(aStyle, aPresContext, kClassID) {}
  33
  34   // Overrides
  35   void Destroy(DestroyContext&) override;
  36
  37   friend nsIFrame* NS_NewScrollbarButtonFrame(mozilla::PresShell* aPresShell,
  38                                               ComputedStyle* aStyle);
  39
  40   nsresult HandleEvent(nsPresContext* aPresContext,
  41                        mozilla::WidgetGUIEvent* aEvent,
  42                        nsEventStatus* aEventStatus) override;
  43
  44   static nsresult GetChildWithTag(nsAtom* atom, nsIFrame* start,
  45                                   nsIFrame*& result);
  46   static nsresult GetParentWithTag(nsAtom* atom, nsIFrame* start,
  47                                    nsIFrame*& result);
  48
  49   bool HandleButtonPress(nsPresContext* aPresContext,
  50                          mozilla::WidgetGUIEvent* aEvent,
  51                          nsEventStatus* aEventStatus);
  52
  53   NS_IMETHOD HandleMultiplePress(nsPresContext* aPresContext,
  54                                  mozilla::WidgetGUIEvent* aEvent,
  55                                  nsEventStatus* aEventStatus,
  56                                  bool aControlHeld) override {
  57     return NS_OK;
  58   }
  59
  60   MOZ_CAN_RUN_SCRIPT
  61   NS_IMETHOD HandleDrag(nsPresContext* aPresContext,
  62                         mozilla::WidgetGUIEvent* aEvent,
  63                         nsEventStatus* aEventStatus) override {
  64     return NS_OK;
  65   }
  66
  67   NS_IMETHOD HandleRelease(nsPresContext* aPresContext,
  68                            mozilla::WidgetGUIEvent* aEvent,
  69                            nsEventStatus* aEventStatus) override;
  70
  71  protected:
  72   void StartRepeat() {
  73     nsRepeatService::GetInstance()->Start(Notify, this, mContent->OwnerDoc(),
  74                                           "nsScrollbarButtonFrame"_ns);
  75   }
  76   void StopRepeat() { nsRepeatService::GetInstance()->Stop(Notify, this); }
  77   void Notify();
  78   static void Notify(void* aData) {
  79     static_cast<nsScrollbarButtonFrame*>(aData)->Notify();
  80   }
  81
  82   bool mCursorOnThis = false;
  83 };
  84
  85 #endif