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/*
* Copyright (C) 2009 Kevin Ollivier All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include "scrollbar_render.h"
#include <wx/defs.h>
#include <wx/dc.h>
#include <wx/dcgraph.h>
#include <wx/graphics.h>
#include <wx/renderer.h>
#include <wx/window.h>
#include <wx/msw/private.h>
#include <wx/msw/uxtheme.h>
// constants
#define SP_BUTTON 1
#define SP_THUMBHOR 2
#define SP_THUMBVERT 3
#define SP_TRACKENDHOR 4
#define SP_TRACKENDVERT 7
#define SP_GRIPPERHOR 8
#define SP_GRIPPERVERT 9
#define TS_NORMAL 1
#define TS_HOVER 2
#define TS_ACTIVE 3
#define TS_DISABLED 4
#define TS_UP_BUTTON 0
#define TS_DOWN_BUTTON 4
#define TS_LEFT_BUTTON 8
#define TS_RIGHT_BUTTON 12
#if wxUSE_GRAPHICS_CONTEXT
// TODO remove this dependency (gdiplus needs the macros)
// we need to undef because the macros are being defined in WebCorePrefix.h
// but GdiPlus.h is not accepting them
#undef max
#define max(a,b) (((a) > (b)) ? (a) : (b))
#undef min
#define min(a,b) (((a) < (b)) ? (a) : (b))
#include <wx/dcgraph.h>
#include "gdiplus.h"
using namespace Gdiplus;
#endif // wxUSE_GRAPHICS_CONTEXT
class GraphicsHDC
{
public:
GraphicsHDC(wxDC* dc)
{
#if wxUSE_GRAPHICS_CONTEXT
m_graphics = NULL;
wxGCDC* gcdc = wxDynamicCast(dc, wxGCDC);
if (gcdc) {
m_graphics = (Graphics*)gcdc->GetGraphicsContext()->GetNativeContext();
m_hdc = m_graphics->GetHDC();
}
else
#endif
m_hdc = GetHdcOf(*dc);
}
~GraphicsHDC()
{
#if wxUSE_GRAPHICS_CONTEXT
if (m_graphics)
m_graphics->ReleaseHDC(m_hdc);
#endif
}
operator HDC() const { return m_hdc; }
private:
HDC m_hdc;
#if wxUSE_GRAPHICS_CONTEXT
Graphics* m_graphics;
#endif
};
int getTSStateForPart(wxScrollbarPart part, wxScrollbarPart focusPart, wxScrollbarPart hoverPart, int flags = 0)
{
int xpState = TS_NORMAL;
if (flags & wxCONTROL_DISABLED)
xpState = TS_DISABLED;
else if (part == focusPart)
xpState = TS_ACTIVE;
else if (part == hoverPart)
xpState = TS_HOVER;
return xpState;
}
void wxRenderer_DrawScrollbar(wxWindow* window, wxDC& dc,
const wxRect& rect, wxOrientation orient, int current, wxScrollbarPart focusPart, wxScrollbarPart hoverPart, int max, int step, int flags)
{
wxUxThemeEngine *engine = wxUxThemeEngine::Get();
HTHEME hTheme = (HTHEME)engine->OpenThemeData(0, L"SCROLLBAR");
bool horiz = orient == wxHORIZONTAL;
int part = 0;
if (horiz)
part = SP_TRACKENDHOR;
else
part = SP_TRACKENDVERT;
int xpState = TS_NORMAL;
wxRect transRect = rect;
#if USE(WXGC)
// when going from GdiPlus -> Gdi, any GdiPlus transformations are lost
// so we need to alter the coordinates to reflect their transformed point.
double xtrans = 0;
double ytrans = 0;
wxGCDC* gcdc = wxDynamicCast(&dc, wxGCDC);
wxGraphicsContext* gc = gcdc->GetGraphicsContext();
gc->GetTransform().TransformPoint(&xtrans, &ytrans);
transRect.x += (int)xtrans;
transRect.y += (int)ytrans;
#endif
RECT r;
wxCopyRectToRECT(transRect, r);
// Unlike Mac, on MSW you draw the scrollbar piece by piece.
// so we draw the track first, then the buttons
if (hTheme)
{
engine->DrawThemeBackground(hTheme, GraphicsHDC(&dc), part, xpState, &r, 0);
int buttonSize = 16;
part = SP_BUTTON;
xpState = getTSStateForPart(wxSCROLLPART_BACKBTNSTART, focusPart, hoverPart, flags);
xpState += horiz ? TS_LEFT_BUTTON : TS_UP_BUTTON;
RECT buttonRect = r;
buttonRect.bottom = buttonRect.top + buttonSize;
buttonRect.right = buttonRect.left + buttonSize;
engine->DrawThemeBackground(hTheme, GraphicsHDC(&dc), part, xpState, &buttonRect, 0);
xpState = getTSStateForPart(wxSCROLLPART_FWDBTNEND, focusPart, hoverPart, flags);
xpState += horiz ? TS_RIGHT_BUTTON : TS_DOWN_BUTTON;
buttonRect = r;
buttonRect.top = buttonRect.bottom - buttonSize;
buttonRect.left = buttonRect.right - buttonSize;
engine->DrawThemeBackground(hTheme, GraphicsHDC(&dc), part, xpState, &buttonRect, 0);
part = horiz ? SP_THUMBHOR : SP_THUMBVERT;
int physicalLength = horiz ? rect.width : rect.height;
physicalLength -= buttonSize*2;
int thumbStart = 0;
int thumbLength = 0;
calcThumbStartAndLength(physicalLength, max,
current, step, &thumbStart, &thumbLength);
buttonRect = r;
if (horiz) {
buttonRect.left = buttonRect.left + thumbStart + buttonSize;
buttonRect.right = buttonRect.left + thumbLength;
} else {
buttonRect.top = buttonRect.top + thumbStart + buttonSize;
buttonRect.bottom = buttonRect.top + thumbLength;
}
xpState = getTSStateForPart(wxSCROLLPART_THUMB, focusPart, hoverPart, flags);
engine->DrawThemeBackground(hTheme, GraphicsHDC(&dc), part, xpState, &buttonRect, 0);
// draw the gripper
int thickness = ::GetSystemMetrics(SM_CXVSCROLL) / 2;
buttonRect.left += ((buttonRect.right - buttonRect.left) - thickness) / 2;
buttonRect.top += ((buttonRect.bottom - buttonRect.top) - thickness) / 2;
buttonRect.right = buttonRect.left + thickness;
buttonRect.bottom = buttonRect.top + thickness;
if (horiz)
part = SP_GRIPPERHOR;
else
part = SP_GRIPPERVERT;
engine->DrawThemeBackground(hTheme, GraphicsHDC(&dc), part, xpState, &buttonRect, 0);
}
}
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