1/*
2 * Copyright (C) 2009 Kevin Ollivier  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 COMPUTER, 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 COMPUTER, 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
28#include "scrollbar_render.h"
29
30#include <wx/defs.h>
31#include <wx/dc.h>
32#include <wx/dcgraph.h>
33#include <wx/renderer.h>
34#include <wx/settings.h>
35#include <wx/window.h>
36
37#include <gtk/gtk.h>
38
39#if wxCHECK_VERSION(2, 9, 0)
40    #include <wx/gtk/dc.h>
41#else
42    #include "wx/gtk/win_gtk.h"
43#endif
44
45int wxStyleForPart(wxScrollbarPart part, wxScrollbarPart focusPart, wxScrollbarPart hoverPart, int flags)
46{
47    int style = 0;
48    if (flags == wxCONTROL_DISABLED)
49        style = wxCONTROL_DISABLED;
50    else if (part == focusPart)
51        style = wxCONTROL_PRESSED;
52    else if (part == hoverPart)
53        style = wxCONTROL_CURRENT;
54
55    return style;
56}
57
58GtkWidget* GetButtonWidget()
59{
60    static GtkWidget *s_button = NULL;
61    static GtkWidget *s_window = NULL;
62
63    if ( !s_button )
64    {
65        s_window = gtk_window_new( GTK_WINDOW_POPUP );
66        gtk_widget_realize( s_window );
67        s_button = gtk_button_new();
68        gtk_container_add( GTK_CONTAINER(s_window), s_button );
69        gtk_widget_realize( s_button );
70    }
71
72    return s_button;
73}
74
75
76GdkWindow* wxGetGdkWindowForDC(wxWindow* win, wxDC& dc)
77{
78    GdkWindow* gdk_window = NULL;
79#if wxCHECK_VERSION(2, 9, 0)
80    if ( dc.IsKindOf( CLASSINFO(wxGCDC) ) )
81        gdk_window = win->GTKGetDrawingWindow();
82    else
83    {
84        wxGTKDCImpl *impl = wxDynamicCast(dc.GetImpl(), wxGTKDCImpl);
85        if ( impl )
86            gdk_window = impl->GetGDKWindow();
87    }
88#else // wx < 2.9
89    // The way to get a GdkWindow* from a wxWindow is to use
90    // GTK_PIZZA(win->m_wxwindow)->bin_window, but this approach
91    // won't work when drawing to a wxMemoryDC as it has its own
92    // GdkWindow* for its bitmap. wxWindowDC's GetGDKWindow() was
93    // designed to create a solution for all DCs, but we can't
94    // implement it with wxGCDC since it doesn't retain its wxWindow.
95    // So, to work around this, we use GetGDKWindow whenever possible
96    // and use bin_window for wxGCDC.
97#if wxUSE_GRAPHICS_CONTEXT
98    if ( dc.IsKindOf( CLASSINFO(wxGCDC) ) )
99        gdk_window = GTK_PIZZA(win->m_wxwindow)->bin_window;
100    else
101#endif
102       gdk_window = dc.GetGDKWindow();
103    wxASSERT_MSG( gdk_window,
104                  wxT("cannot use wxRendererNative on wxDC of this type") );
105#endif // wx 2.9/2.8
106
107    return gdk_window;
108}
109
110void wxRenderer_DrawScrollbar(wxWindow* window, wxDC& dc, const wxRect& rect, wxOrientation orient,
111                        int current, wxScrollbarPart focusPart, wxScrollbarPart hoverPart, int max, int step, int flags)
112{
113    bool horiz = orient == wxHORIZONTAL;
114    wxColour scrollbar_colour = wxSystemSettings::GetColour(wxSYS_COLOUR_SCROLLBAR);
115    dc.SetBrush(wxBrush(scrollbar_colour));
116    dc.SetPen(wxPen(wxSystemSettings::GetColour(wxSYS_COLOUR_BTNSHADOW)));
117    dc.DrawRectangle(rect.x, rect.y, rect.width, rect.height);
118
119    // when going from Cairo -> Gdk, any Cairo context transformations are lost
120    // so we need to alter the coordinates to reflect their transformed point.
121    double xtrans = 0;
122    double ytrans = 0;
123
124    wxGCDC* gcdc = wxDynamicCast(&dc, wxGCDC);
125    wxGraphicsContext* gc = gcdc->GetGraphicsContext();
126    gc->GetTransform().TransformPoint(&xtrans, &ytrans);
127
128    wxRendererNative& renderer = wxRendererNative::Get();
129    int x = rect.x + (int)xtrans;
130    int y = rect.y + (int)ytrans;
131
132    int buttonLength = 16;
133
134    renderer.DrawPushButton(window, dc, wxRect(x,y,buttonLength,buttonLength), wxStyleForPart(wxSCROLLPART_BACKBTNSTART, focusPart, hoverPart, flags));
135
136    GtkWidget* button = GetButtonWidget();
137    GdkWindow* gdk_window = wxGetGdkWindowForDC(window, dc);
138
139    GtkArrowType arrowType = GTK_ARROW_UP;
140    if (horiz)
141        arrowType = GTK_ARROW_LEFT;
142
143    gtk_paint_arrow( button->style, gdk_window, GTK_STATE_NORMAL, GTK_SHADOW_OUT, NULL, button, "arrow", arrowType, false, x + 4, y + 4, 8, 8);
144
145    wxRect buttonRect = rect;
146    int physicalLength = horiz ? rect.width : rect.height;
147    physicalLength -= buttonLength*2;
148    int thumbStart = 0;
149    int thumbLength = 0;
150    calcThumbStartAndLength(physicalLength, max, current, step, &thumbStart, &thumbLength);
151
152    if (horiz) {
153        buttonRect.x = x + thumbStart + buttonLength;
154        buttonRect.y = y;
155        buttonRect.width = thumbLength;
156    } else {
157        buttonRect.x = x;
158        buttonRect.y = y + thumbStart + buttonLength;
159        buttonRect.height = thumbLength;
160    }
161
162    renderer.DrawPushButton(window, dc, buttonRect, wxStyleForPart(wxSCROLLPART_THUMB, focusPart, hoverPart, flags));
163
164    if (horiz)
165        x += rect.width - buttonLength;
166    else
167        y += rect.height - buttonLength;
168
169    renderer.DrawPushButton(window, dc, wxRect(x,y,buttonLength,buttonLength), wxStyleForPart(wxSCROLLPART_FWDBTNEND, focusPart, hoverPart, flags));
170
171    if (horiz)
172        arrowType = GTK_ARROW_RIGHT;
173    else
174        arrowType = GTK_ARROW_DOWN;
175
176    gtk_paint_arrow( button->style, gdk_window, GTK_STATE_NORMAL, GTK_SHADOW_OUT, NULL, button, "arrow", arrowType, false, x + 4, y + 4, 8, 8);
177}
178