1/* 2 * Copyright (C) 2008 Apple 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 6 * are met: 7 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * 2. Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * 13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY 14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR 17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY 21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 24 */ 25 26#include "config.h" 27#include "ScrollbarThemeGtk.h" 28 29#ifdef GTK_API_VERSION_2 30 31#include "GtkVersioning.h" 32#include "PlatformMouseEvent.h" 33#include "RenderThemeGtk.h" 34#include "ScrollView.h" 35#include "Scrollbar.h" 36#include "WidgetRenderingContext.h" 37#include <gtk/gtk.h> 38 39namespace WebCore { 40 41static void gtkStyleSetCallback(GtkWidget* widget, GtkStyle* previous, ScrollbarThemeGtk* scrollbarTheme) 42{ 43 scrollbarTheme->updateThemeProperties(); 44} 45 46ScrollbarThemeGtk::ScrollbarThemeGtk() 47{ 48 updateThemeProperties(); 49 g_signal_connect(static_cast<RenderThemeGtk*>(RenderTheme::defaultTheme().get())->gtkHScrollbar(), 50 "style-set", G_CALLBACK(gtkStyleSetCallback), this); 51} 52 53void ScrollbarThemeGtk::updateThemeProperties() 54{ 55 GtkWidget* scrollbar = static_cast<RenderThemeGtk*>(RenderTheme::defaultTheme().get())->gtkHScrollbar(); 56 gtk_widget_style_get(scrollbar, 57 "slider_width", &m_thumbFatness, 58 "trough_border", &m_troughBorderWidth, 59 "stepper-size", &m_stepperSize, 60 "trough-under-steppers", &m_troughUnderSteppers, 61 "has-secondary-forward-stepper", &m_hasForwardButtonStartPart, 62 "has-secondary-backward-stepper", &m_hasBackButtonEndPart, NULL); 63 m_minThumbLength = gtk_range_get_min_slider_size(GTK_RANGE(scrollbar)); 64 updateScrollbarsFrameThickness(); 65} 66 67static GtkWidget* getWidgetForScrollbar(Scrollbar* scrollbar) 68{ 69 RenderThemeGtk* theme = static_cast<RenderThemeGtk*>(RenderTheme::defaultTheme().get()); 70 return scrollbar->orientation() == VerticalScrollbar ? theme->gtkVScrollbar() : theme->gtkHScrollbar(); 71} 72 73void ScrollbarThemeGtk::paintTrackBackground(GraphicsContext* context, Scrollbar* scrollbar, const IntRect& rect) 74{ 75 // Paint the track background. If the trough-under-steppers property is true, this 76 // should be the full size of the scrollbar, but if is false, it should only be the 77 // track rect. 78 IntRect fullScrollbarRect(rect); 79 if (m_troughUnderSteppers) 80 fullScrollbarRect = IntRect(scrollbar->x(), scrollbar->y(), scrollbar->width(), scrollbar->height()); 81 82 WidgetRenderingContext widgetContext(context, fullScrollbarRect); 83 IntRect paintRect(IntPoint(), fullScrollbarRect.size()); 84 widgetContext.gtkPaintBox(paintRect, getWidgetForScrollbar(scrollbar), 85 GTK_STATE_ACTIVE, GTK_SHADOW_IN, "trough"); 86} 87 88void ScrollbarThemeGtk::paintScrollbarBackground(GraphicsContext* context, Scrollbar* scrollbar) 89{ 90 IntRect fullScrollbarRect = IntRect(scrollbar->x(), scrollbar->y(), scrollbar->width(), scrollbar->height()); 91 92 WidgetRenderingContext widgetContext(context, fullScrollbarRect); 93 widgetContext.gtkPaintBox(fullScrollbarRect, getWidgetForScrollbar(scrollbar), 94 GTK_STATE_NORMAL, GTK_SHADOW_IN, "scrolled_window"); 95} 96 97void ScrollbarThemeGtk::paintThumb(GraphicsContext* context, Scrollbar* scrollbar, const IntRect& rect) 98{ 99 GtkWidget* widget = getWidgetForScrollbar(scrollbar); 100 gboolean activateSlider; 101 gtk_widget_style_get(widget, "activate-slider", &activateSlider, NULL); 102 103 GtkStateType stateType = GTK_STATE_NORMAL; 104 GtkShadowType shadowType = GTK_SHADOW_OUT; 105 if (activateSlider && scrollbar->pressedPart() == ThumbPart) { 106 stateType = GTK_STATE_ACTIVE; 107 shadowType = GTK_SHADOW_IN; 108 } else if (scrollbar->pressedPart() == ThumbPart || scrollbar->hoveredPart() == ThumbPart) 109 stateType = GTK_STATE_PRELIGHT; 110 111 // The adjustment controls the rendering of the scrollbar thumb. If it's not set 112 // properly the theme may not draw the thumb borders properly. 113 GtkAdjustment* adjustment = gtk_range_get_adjustment(GTK_RANGE(widget)); 114 gtk_adjustment_set_value(adjustment, scrollbar->currentPos()); 115 gtk_adjustment_set_lower(adjustment, 0); 116 gtk_adjustment_set_upper(adjustment, scrollbar->maximum()); 117 118 GtkOrientation orientation = GTK_ORIENTATION_HORIZONTAL; 119 if (scrollbar->orientation() == VerticalScrollbar) { 120 gtk_adjustment_set_page_size(adjustment, rect.height()); 121 orientation = GTK_ORIENTATION_VERTICAL; 122 } else 123 gtk_adjustment_set_page_size(adjustment, rect.width()); 124 125 WidgetRenderingContext widgetContext(context, rect); 126 IntRect sliderRect(IntPoint(), rect.size()); 127 widgetContext.gtkPaintSlider(sliderRect, widget, stateType, shadowType, "slider", orientation); 128} 129 130void ScrollbarThemeGtk::paintButton(GraphicsContext* context, Scrollbar* scrollbar, const IntRect& rect, ScrollbarPart part) 131{ 132 // The buttons will be disabled if the thumb is as the appropriate extreme. 133 GtkShadowType shadowType = GTK_SHADOW_OUT; 134 GtkStateType stateType = GTK_STATE_INSENSITIVE; 135 bool pressed = (part == scrollbar->pressedPart()); 136 137 if ((BackButtonStartPart == part && scrollbar->currentPos()) 138 || (BackButtonEndPart == part && scrollbar->currentPos()) 139 || (ForwardButtonEndPart == part && scrollbar->currentPos() != scrollbar->maximum()) 140 || (ForwardButtonStartPart == part && scrollbar->currentPos() != scrollbar->maximum())) { 141 stateType = GTK_STATE_NORMAL; 142 if (pressed) { 143 stateType = GTK_STATE_ACTIVE; 144 shadowType = GTK_SHADOW_IN; 145 } else if (part == scrollbar->hoveredPart()) 146 stateType = GTK_STATE_PRELIGHT; 147 } 148 149 // Themes determine how to draw the button (which button to draw) based on the allocation 150 // of the widget. Where the target rect is in relation to the total widget allocation 151 // determines the button. 152 ScrollbarOrientation orientation = scrollbar->orientation(); 153 int buttonSize = (orientation == VerticalScrollbar) ? rect.height() : rect.width(); 154 int totalAllocation = buttonSize * 5; // One space for each button and one extra. 155 int buttonOffset = 0; 156 if (ForwardButtonStartPart == part) 157 buttonOffset = buttonSize; 158 else if (BackButtonEndPart == part) 159 buttonOffset = 3 * buttonSize; 160 else if (ForwardButtonEndPart == part) 161 buttonOffset = 4 * buttonSize; 162 163 // Now we want the allocation to be relative to the origin of the painted rect. 164 GtkWidget* widget = getWidgetForScrollbar(scrollbar); 165 GtkAllocation allocation; 166 gtk_widget_get_allocation(widget, &allocation); 167 allocation.x = allocation.y = 0; 168 allocation.width = rect.width(); 169 allocation.height = rect.height(); 170 171 if (orientation == VerticalScrollbar) { 172 allocation.height = totalAllocation; 173 allocation.y -= buttonOffset; 174 } else { 175 allocation.width = totalAllocation; 176 allocation.x -= buttonOffset; 177 } 178 gtk_widget_set_allocation(widget, &allocation); 179 180 const char* detail = orientation == VerticalScrollbar ? "vscrollbar" : "hscrollbar"; 181 WidgetRenderingContext widgetContext(context, rect); 182 183 IntRect buttonRect(IntPoint(), rect.size()); 184 widgetContext.gtkPaintBox(buttonRect, widget, stateType, shadowType, detail); 185 186 float arrowScaling; 187 gtk_widget_style_get(widget, "arrow-scaling", &arrowScaling, NULL); 188 IntSize arrowSize = rect.size(); 189 arrowSize.scale(arrowScaling); 190 IntRect arrowRect(IntPoint(buttonRect.x() + (buttonRect.width() - arrowSize.width()) / 2, 191 buttonRect.y() + (buttonRect.height() - arrowSize.height()) / 2), 192 arrowSize); 193 if (pressed) { 194 int arrowDisplacementX, arrowDisplacementY; 195 gtk_widget_style_get(widget, 196 "arrow-displacement-x", &arrowDisplacementX, 197 "arrow-displacement-y", &arrowDisplacementY, 198 NULL); 199 arrowRect.move(arrowDisplacementX, arrowDisplacementY); 200 } 201 202 GtkArrowType arrowType = GTK_ARROW_DOWN; 203 if (orientation == VerticalScrollbar) { 204 if (part == BackButtonEndPart || part == BackButtonStartPart) 205 arrowType = GTK_ARROW_UP; 206 } else if (orientation == HorizontalScrollbar) { 207 arrowType = GTK_ARROW_RIGHT; 208 if (part == BackButtonEndPart || part == BackButtonStartPart) 209 arrowType = GTK_ARROW_LEFT; 210 } 211 widgetContext.gtkPaintArrow(arrowRect, widget, stateType, shadowType, arrowType, detail); 212} 213 214} // namespace WebCore 215 216#endif // GTK_API_VERSION_2 217