1/* 2 * Copyright (C) 2008 Apple Inc. All Rights Reserved. 3 * Copyright (C) 2008, 2009 Google Inc. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY 15 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 17 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR 18 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 19 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 20 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 21 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY 22 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 24 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25 */ 26 27#include "config.h" 28#include "platform/scroll/ScrollbarThemeNonMacCommon.h" 29 30#include "platform/PlatformMouseEvent.h" 31#include "platform/graphics/GraphicsContextStateSaver.h" 32#include "platform/scroll/ScrollableArea.h" 33#include "platform/scroll/ScrollbarThemeClient.h" 34 35namespace blink { 36 37bool ScrollbarThemeNonMacCommon::hasThumb(ScrollbarThemeClient* scrollbar) 38{ 39 // This method is just called as a paint-time optimization to see if 40 // painting the thumb can be skipped. We don't have to be exact here. 41 return thumbLength(scrollbar) > 0; 42} 43 44IntRect ScrollbarThemeNonMacCommon::backButtonRect(ScrollbarThemeClient* scrollbar, ScrollbarPart part, bool) 45{ 46 // Windows and Linux just have single arrows. 47 if (part == BackButtonEndPart) 48 return IntRect(); 49 50 IntSize size = buttonSize(scrollbar); 51 return IntRect(scrollbar->x(), scrollbar->y(), size.width(), size.height()); 52} 53 54IntRect ScrollbarThemeNonMacCommon::forwardButtonRect(ScrollbarThemeClient* scrollbar, ScrollbarPart part, bool) 55{ 56 // Windows and Linux just have single arrows. 57 if (part == ForwardButtonStartPart) 58 return IntRect(); 59 60 IntSize size = buttonSize(scrollbar); 61 int x, y; 62 if (scrollbar->orientation() == HorizontalScrollbar) { 63 x = scrollbar->x() + scrollbar->width() - size.width(); 64 y = scrollbar->y(); 65 } else { 66 x = scrollbar->x(); 67 y = scrollbar->y() + scrollbar->height() - size.height(); 68 } 69 return IntRect(x, y, size.width(), size.height()); 70} 71 72IntRect ScrollbarThemeNonMacCommon::trackRect(ScrollbarThemeClient* scrollbar, bool) 73{ 74 IntSize bs = buttonSize(scrollbar); 75 int thickness = scrollbarThickness(scrollbar->controlSize()); 76 if (scrollbar->orientation() == HorizontalScrollbar) { 77 // Once the scrollbar becomes smaller than the size of the 78 // two buttons with a 1 pixel gap, the track disappears. 79 if (scrollbar->width() <= 2 * bs.width() + 1) 80 return IntRect(); 81 return IntRect(scrollbar->x() + bs.width(), scrollbar->y(), scrollbar->width() - 2 * bs.width(), thickness); 82 } 83 if (scrollbar->height() <= 2 * bs.height() + 1) 84 return IntRect(); 85 return IntRect(scrollbar->x(), scrollbar->y() + bs.height(), thickness, scrollbar->height() - 2 * bs.height()); 86} 87 88void ScrollbarThemeNonMacCommon::paintTrackBackground(GraphicsContext* context, ScrollbarThemeClient* scrollbar, const IntRect& rect) 89{ 90 // Just assume a forward track part. We only paint the track as a single piece when there is no thumb. 91 if (!hasThumb(scrollbar)) 92 paintTrackPiece(context, scrollbar, rect, ForwardTrackPart); 93} 94 95void ScrollbarThemeNonMacCommon::paintTickmarks(GraphicsContext* context, ScrollbarThemeClient* scrollbar, const IntRect& rect) 96{ 97 if (scrollbar->orientation() != VerticalScrollbar) 98 return; 99 100 if (rect.height() <= 0 || rect.width() <= 0) 101 return; 102 103 // Get the tickmarks for the frameview. 104 Vector<IntRect> tickmarks; 105 scrollbar->getTickmarks(tickmarks); 106 if (!tickmarks.size()) 107 return; 108 109 GraphicsContextStateSaver stateSaver(*context); 110 context->setShouldAntialias(false); 111 112 for (Vector<IntRect>::const_iterator i = tickmarks.begin(); i != tickmarks.end(); ++i) { 113 // Calculate how far down (in %) the tick-mark should appear. 114 const float percent = static_cast<float>(i->y()) / scrollbar->totalSize(); 115 116 // Calculate how far down (in pixels) the tick-mark should appear. 117 const int yPos = rect.y() + (rect.height() * percent); 118 119 context->setFillColor(Color(0xCC, 0xAA, 0x00, 0xFF)); 120 FloatRect tickRect(rect.x(), yPos, rect.width(), 3); 121 context->fillRect(tickRect); 122 123 context->setFillColor(Color(0xFF, 0xDD, 0x00, 0xFF)); 124 FloatRect tickStroke(rect.x(), yPos + 1, rect.width(), 1); 125 context->fillRect(tickStroke); 126 } 127} 128 129} // namespace blink 130