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)#include "ui/views/controls/scrollbar/base_scroll_bar_thumb.h" 65821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 75821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "ui/gfx/canvas.h" 85821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "ui/gfx/rect.h" 95821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "ui/views/controls/scrollbar/base_scroll_bar.h" 105821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 115821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)namespace { 125821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// The distance the mouse can be dragged outside the bounds of the thumb during 135821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// dragging before the scrollbar will snap back to its regular position. 145821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)static const int kScrollThumbDragOutSnap = 100; 155821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 165821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 175821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)namespace views { 185821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 195821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)BaseScrollBarThumb::BaseScrollBarThumb(BaseScrollBar* scroll_bar) 205821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) : scroll_bar_(scroll_bar), 215821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) drag_start_position_(-1), 225821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) mouse_offset_(-1), 232a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) state_(CustomButton::STATE_NORMAL) { 245821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 255821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 265821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)BaseScrollBarThumb::~BaseScrollBarThumb() { 275821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 285821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 295821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void BaseScrollBarThumb::SetSize(int size) { 305821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Make sure the thumb is never sized smaller than its minimum possible 315821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // display size. 325821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) gfx::Size prefsize = GetPreferredSize(); 335821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) size = std::max(size, scroll_bar_->IsHorizontal() ? prefsize.width() : 345821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) prefsize.height()); 355821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) gfx::Rect thumb_bounds = bounds(); 365821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (scroll_bar_->IsHorizontal()) { 375821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) thumb_bounds.set_width(size); 385821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } else { 395821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) thumb_bounds.set_height(size); 405821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 415821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) SetBoundsRect(thumb_bounds); 425821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 435821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 445821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)int BaseScrollBarThumb::GetSize() const { 455821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (scroll_bar_->IsHorizontal()) 465821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return width(); 475821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return height(); 485821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 495821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 505821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void BaseScrollBarThumb::SetPosition(int position) { 515821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) gfx::Rect thumb_bounds = bounds(); 525821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) gfx::Rect track_bounds = scroll_bar_->GetTrackBounds(); 535821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (scroll_bar_->IsHorizontal()) { 545821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) thumb_bounds.set_x(track_bounds.x() + position); 555821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } else { 565821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) thumb_bounds.set_y(track_bounds.y() + position); 575821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 585821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) SetBoundsRect(thumb_bounds); 595821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 605821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 615821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)int BaseScrollBarThumb::GetPosition() const { 625821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) gfx::Rect track_bounds = scroll_bar_->GetTrackBounds(); 635821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (scroll_bar_->IsHorizontal()) 645821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return x() - track_bounds.x(); 655821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return y() - track_bounds.y(); 665821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 675821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 685821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void BaseScrollBarThumb::OnMouseEntered(const ui::MouseEvent& event) { 692a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) SetState(CustomButton::STATE_HOVERED); 705821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 715821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 725821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void BaseScrollBarThumb::OnMouseExited(const ui::MouseEvent& event) { 732a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) SetState(CustomButton::STATE_NORMAL); 745821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 755821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 765821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)bool BaseScrollBarThumb::OnMousePressed(const ui::MouseEvent& event) { 775821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) mouse_offset_ = scroll_bar_->IsHorizontal() ? event.x() : event.y(); 785821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) drag_start_position_ = GetPosition(); 792a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) SetState(CustomButton::STATE_PRESSED); 805821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return true; 815821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 825821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 835821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)bool BaseScrollBarThumb::OnMouseDragged(const ui::MouseEvent& event) { 845821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // If the user moves the mouse more than |kScrollThumbDragOutSnap| outside 855821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // the bounds of the thumb, the scrollbar will snap the scroll back to the 865821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // point it was at before the drag began. 875821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (scroll_bar_->IsHorizontal()) { 885821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if ((event.y() < y() - kScrollThumbDragOutSnap) || 895821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) (event.y() > (y() + height() + kScrollThumbDragOutSnap))) { 905821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) scroll_bar_->ScrollToThumbPosition(drag_start_position_, false); 915821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return true; 925821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 935821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } else { 945821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if ((event.x() < x() - kScrollThumbDragOutSnap) || 955821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) (event.x() > (x() + width() + kScrollThumbDragOutSnap))) { 965821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) scroll_bar_->ScrollToThumbPosition(drag_start_position_, false); 975821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return true; 985821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 995821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 1005821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (scroll_bar_->IsHorizontal()) { 1015821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) int thumb_x = event.x() - mouse_offset_; 1022a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) if (base::i18n::IsRTL()) 1032a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) thumb_x *= -1; 1045821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) scroll_bar_->ScrollToThumbPosition(GetPosition() + thumb_x, false); 1055821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } else { 1065821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) int thumb_y = event.y() - mouse_offset_; 1075821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) scroll_bar_->ScrollToThumbPosition(GetPosition() + thumb_y, false); 1085821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 1095821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return true; 1105821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 1115821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1125821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void BaseScrollBarThumb::OnMouseReleased(const ui::MouseEvent& event) { 1132a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) SetState(HitTestPoint(event.location()) ? 1142a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) CustomButton::STATE_HOVERED : CustomButton::STATE_NORMAL); 1155821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 1165821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1175821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void BaseScrollBarThumb::OnMouseCaptureLost() { 1182a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) SetState(CustomButton::STATE_HOVERED); 1195821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 1205821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1215821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)CustomButton::ButtonState BaseScrollBarThumb::GetState() const { 1225821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return state_; 1235821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 1245821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1255821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void BaseScrollBarThumb::SetState(CustomButton::ButtonState state) { 1262a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) if (state_ == state) 1272a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) return; 1282a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 1292a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) CustomButton::ButtonState old_state = state_; 1305821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) state_ = state; 1312a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) scroll_bar_->OnThumbStateChanged(old_state, state); 1325821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) SchedulePaint(); 1335821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 1345821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1355821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} // namespace views 136