1 /* 2 * Copyright (C) 2010 Google Inc. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions are 6 * met: 7 * 8 * * Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * * Redistributions in binary form must reproduce the above 11 * copyright notice, this list of conditions and the following disclaimer 12 * in the documentation and/or other materials provided with the 13 * distribution. 14 * * Neither the name of Google Inc. nor the names of its 15 * contributors may be used to endorse or promote products derived from 16 * this software without specific prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 22 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 29 */ 30 31 #ifndef WebThemeEngine_h 32 #define WebThemeEngine_h 33 34 #include "../WebCanvas.h" 35 #include "../WebColor.h" 36 #include "../WebSize.h" 37 38 namespace blink { 39 40 struct WebRect; 41 42 class WebThemeEngine { 43 public: 44 // The UI part which is being accessed. 45 enum Part { 46 // ScrollbarTheme parts 47 PartScrollbarDownArrow, 48 PartScrollbarLeftArrow, 49 PartScrollbarRightArrow, 50 PartScrollbarUpArrow, 51 PartScrollbarHorizontalThumb, 52 PartScrollbarVerticalThumb, 53 PartScrollbarHorizontalTrack, 54 PartScrollbarVerticalTrack, 55 56 // RenderTheme parts 57 PartCheckbox, 58 PartRadio, 59 PartButton, 60 PartTextField, 61 PartMenuList, 62 PartSliderTrack, 63 PartSliderThumb, 64 PartInnerSpinButton, 65 PartProgressBar 66 }; 67 68 // The current state of the associated Part. 69 enum State { 70 StateDisabled, 71 StateHover, 72 StateNormal, 73 StatePressed, 74 StateFocused, 75 StateReadonly, 76 }; 77 78 // Extra parameters for drawing the PartScrollbarHorizontalTrack and 79 // PartScrollbarVerticalTrack. 80 struct ScrollbarTrackExtraParams { 81 bool isBack; // Whether this is the 'back' part or the 'forward' part. 82 83 // The bounds of the entire track, as opposed to the part being painted. 84 int trackX; 85 int trackY; 86 int trackWidth; 87 int trackHeight; 88 }; 89 90 // Extra parameters for PartCheckbox, PartPushButton and PartRadio. 91 struct ButtonExtraParams { 92 bool checked; 93 bool indeterminate; // Whether the button state is indeterminate. 94 bool isDefault; // Whether the button is default button. 95 bool hasBorder; 96 WebColor backgroundColor; 97 }; 98 99 // Extra parameters for PartTextField 100 struct TextFieldExtraParams { 101 bool isTextArea; 102 bool isListbox; 103 WebColor backgroundColor; 104 }; 105 106 // Extra parameters for PartMenuList 107 struct MenuListExtraParams { 108 bool hasBorder; 109 bool hasBorderRadius; 110 int arrowX; 111 int arrowY; 112 int arrowHeight; 113 WebColor backgroundColor; 114 bool fillContentArea; 115 }; 116 117 // Extra parameters for PartSliderTrack and PartSliderThumb 118 struct SliderExtraParams { 119 bool vertical; 120 bool inDrag; 121 }; 122 123 // Extra parameters for PartInnerSpinButton 124 struct InnerSpinButtonExtraParams { 125 bool spinUp; 126 bool readOnly; 127 }; 128 129 // Extra parameters for PartProgressBar 130 struct ProgressBarExtraParams { 131 bool determinate; 132 int valueRectX; 133 int valueRectY; 134 int valueRectWidth; 135 int valueRectHeight; 136 }; 137 138 union ExtraParams { 139 ScrollbarTrackExtraParams scrollbarTrack; 140 ButtonExtraParams button; 141 TextFieldExtraParams textField; 142 MenuListExtraParams menuList; 143 SliderExtraParams slider; 144 InnerSpinButtonExtraParams innerSpin; 145 ProgressBarExtraParams progressBar; 146 }; 147 148 // Gets the size of the given theme part. For variable sized items 149 // like vertical scrollbar thumbs, the width will be the required width of 150 // the track while the height will be the minimum height. getSize(Part)151 virtual WebSize getSize(Part) { return WebSize(); } 152 // Paint the given the given theme part. paint(WebCanvas *,Part,State,const WebRect &,const ExtraParams *)153 virtual void paint(WebCanvas*, Part, State, const WebRect&, const ExtraParams*) { } 154 }; 155 156 } // namespace blink 157 158 #endif 159