15821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Copyright (c) 2011 The Chromium Authors. All rights reserved. 25821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Use of this source code is governed by a BSD-style license that can be 35821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// found in the LICENSE file. 45821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 55821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#ifndef UI_VIEWS_CONTROLS_SCROLLBAR_BASE_SCROLL_BAR_THUMB_H_ 65821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#define UI_VIEWS_CONTROLS_SCROLLBAR_BASE_SCROLL_BAR_THUMB_H_ 75821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 85821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "ui/gfx/size.h" 95821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "ui/views/controls/button/custom_button.h" 105821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "ui/views/controls/scrollbar/scroll_bar.h" 115821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "ui/views/view.h" 125821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 135821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)namespace gfx { 145821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)class Canvas; 155821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 165821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 175821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)namespace views { 185821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 195821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)class BaseScrollBar; 205821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 215821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)/////////////////////////////////////////////////////////////////////////////// 225821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// 235821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// BaseScrollBarThumb 245821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// 255821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// A view that acts as the thumb in the scroll bar track that the user can 265821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// drag to scroll the associated contents view within the viewport. 275821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// 285821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)/////////////////////////////////////////////////////////////////////////////// 295821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)class VIEWS_EXPORT BaseScrollBarThumb : public View { 305821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) public: 315821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) explicit BaseScrollBarThumb(BaseScrollBar* scroll_bar); 325821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) virtual ~BaseScrollBarThumb(); 335821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 345821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Sets the size (width or height) of the thumb to the specified value. 355821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) void SetSize(int size); 365821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 375821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Retrieves the size (width or height) of the thumb. 385821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) int GetSize() const; 395821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 405821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Sets the position of the thumb on the x or y axis. 415821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) void SetPosition(int position); 425821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 435821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Gets the position of the thumb on the x or y axis. 445821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) int GetPosition() const; 455821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 465821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // View overrides: 47cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) virtual gfx::Size GetPreferredSize() const OVERRIDE = 0; 485821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 495821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) protected: 505821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // View overrides: 515821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) virtual void OnPaint(gfx::Canvas* canvas) OVERRIDE = 0; 525821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) virtual void OnMouseEntered(const ui::MouseEvent& event) OVERRIDE; 535821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) virtual void OnMouseExited(const ui::MouseEvent& event) OVERRIDE; 545821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) virtual bool OnMousePressed(const ui::MouseEvent& event) OVERRIDE; 555821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) virtual bool OnMouseDragged(const ui::MouseEvent& event) OVERRIDE; 565821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) virtual void OnMouseReleased(const ui::MouseEvent& event) OVERRIDE; 575821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) virtual void OnMouseCaptureLost() OVERRIDE; 585821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 595821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) CustomButton::ButtonState GetState() const; 605821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Update our state and schedule a repaint when the mouse moves over us. 615821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) void SetState(CustomButton::ButtonState state); 625821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 632a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) BaseScrollBar* scroll_bar() { return scroll_bar_; } 642a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 655821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) private: 665821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // The BaseScrollBar that owns us. 675821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) BaseScrollBar* scroll_bar_; 685821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 695821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) int drag_start_position_; 705821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 715821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // The position of the mouse on the scroll axis relative to the top of this 725821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // View when the drag started. 735821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) int mouse_offset_; 745821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 755821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // The current state of the thumb button. 765821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) CustomButton::ButtonState state_; 775821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 785821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DISALLOW_COPY_AND_ASSIGN(BaseScrollBarThumb); 795821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)}; 805821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 815821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} // namespace views 825821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 835821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#endif // UI_VIEWS_CONTROLS_SCROLLBAR_BASE_SCROLL_BAR_THUMB_H_ 84