From ec2dec4fafeeb97801f9ed3a82e5279575b9bb98 Mon Sep 17 00:00:00 2001
From: Casey Link <unnamedrambler@gmail.com>
Date: Fri, 26 Aug 2011 19:47:11 -0500
Subject: [PATCH] Handle our own Arrow Drawing.

Adds AntiAliasing and uses our own colors.
---
 src/libtomahawk/utils/stylehelper.cpp | 90 ++++++++++++++++++++++++++-
 src/libtomahawk/utils/stylehelper.h   |  2 +
 src/libtomahawk/widgets/combobox.cpp  |  3 +-
 3 files changed, 92 insertions(+), 3 deletions(-)

diff --git a/src/libtomahawk/utils/stylehelper.cpp b/src/libtomahawk/utils/stylehelper.cpp
index 2681facc7..7583c5b76 100644
--- a/src/libtomahawk/utils/stylehelper.cpp
+++ b/src/libtomahawk/utils/stylehelper.cpp
@@ -19,7 +19,8 @@
 #include "stylehelper.h"
 
 #include <QPainter>
-
+#include <QPixmapCache>
+#include <QApplication>
 
 QColor StyleHelper::headerUpperColor()
 {
@@ -61,3 +62,90 @@ QColor StyleHelper::headerTextColor()
 {
     return Qt::white;
 }
+
+
+/*
+ * This implementation is from QWindowsStyle (Qt 7.2)
+ *
+ * It is licensed under the GPL 3:
+ * Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
+ * Contact: Nokia Corporation (qt-info@nokia.com)
+ */
+void StyleHelper::drawArrow(QStyle::PrimitiveElement element, QPainter *p, const QStyleOption *opt)
+{
+
+    if (opt->rect.width() <= 1 || opt->rect.height() <= 1)
+        return;
+    QRect r = opt->rect;
+    int size = qMin(r.height(), r.width());
+    QPixmap pixmap;
+    QString pixmapName;
+    pixmapName.sprintf("arrow-%s-%d-%d-%d-%lld",
+                       "$qt_ia",
+                       uint(opt->state), element,
+                       size, opt->palette.cacheKey());
+    if (!QPixmapCache::find(pixmapName, pixmap)) {
+        int border = size/5;
+        int sqsize = 2*(size/2);
+        QImage image(sqsize, sqsize, QImage::Format_ARGB32);
+        image.fill(0);
+        QPainter imagePainter(&image);
+        imagePainter.setRenderHint(QPainter::Antialiasing, true);
+        QPolygon a;
+        switch (element) {
+            case QStyle::PE_IndicatorArrowUp:
+                a.setPoints(3, border, sqsize/2,  sqsize/2, border,  sqsize - border, sqsize/2);
+                break;
+            case QStyle::PE_IndicatorArrowDown:
+                a.setPoints(3, border, sqsize/2,  sqsize/2, sqsize - border,  sqsize - border, sqsize/2);
+                break;
+            case QStyle::PE_IndicatorArrowRight:
+                a.setPoints(3, sqsize - border, sqsize/2,  sqsize/2, border,  sqsize/2, sqsize - border);
+                break;
+            case QStyle::PE_IndicatorArrowLeft:
+                a.setPoints(3, border, sqsize/2,  sqsize/2, border,  sqsize/2, sqsize - border);
+                break;
+            default:
+                break;
+        }
+
+        int bsx = 0;
+        int bsy = 0;
+
+        if (opt->state & QStyle::State_Sunken) {
+            bsx = qApp->style()->pixelMetric(QStyle::PM_ButtonShiftHorizontal);
+            bsy = qApp->style()->pixelMetric(QStyle::PM_ButtonShiftVertical);
+        }
+
+        QRect bounds = a.boundingRect();
+        int sx = sqsize / 2 - bounds.center().x() - 1;
+        int sy = sqsize / 2 - bounds.center().y() - 1;
+        imagePainter.translate(sx + bsx, sy + bsy);
+        imagePainter.setPen(opt->palette.buttonText().color());
+        imagePainter.setBrush(opt->palette.buttonText());
+
+        if (!(opt->state & QStyle::State_Enabled)) {
+            QColor foreGround(150, 150, 150, 150);
+            imagePainter.setBrush(opt->palette.mid().color());
+            imagePainter.setPen(opt->palette.mid().color());
+        } else {
+            QColor shadow(0, 0, 0, 100);
+            imagePainter.translate(0, 1);
+            imagePainter.setPen(shadow);
+            imagePainter.setBrush(shadow);
+            QColor foreGround(255, 255, 255, 210);
+            imagePainter.drawPolygon(a);
+            imagePainter.translate(0, -1);
+            imagePainter.setPen(foreGround);
+            imagePainter.setBrush(foreGround);
+        }
+
+        imagePainter.drawPolygon(a);
+        imagePainter.end();
+        pixmap = QPixmap::fromImage(image);
+        QPixmapCache::insert(pixmapName, pixmap);
+    }
+    int xOffset = r.x() + (r.width() - size)/2;
+    int yOffset = r.y() + (r.height() - size)/2;
+    p->drawPixmap(xOffset, yOffset, pixmap);
+}
diff --git a/src/libtomahawk/utils/stylehelper.h b/src/libtomahawk/utils/stylehelper.h
index 7881f5974..2fa371725 100644
--- a/src/libtomahawk/utils/stylehelper.h
+++ b/src/libtomahawk/utils/stylehelper.h
@@ -22,6 +22,7 @@
 
 #include <QColor>
 #include <QStyle>
+#include <QStyleOption>
 
 class QPalette;
 class QPainter;
@@ -36,6 +37,7 @@ public:
     static QColor headerHighlightColor();
 
     static void horizontalHeader(QPainter *painter, const QRect &rect);
+    static void drawArrow(QStyle::PrimitiveElement, QPainter *painter, const QStyleOption *opt);
 private:
     static QColor m_baseColor;
     static QColor m_requestedBaseColor;
diff --git a/src/libtomahawk/widgets/combobox.cpp b/src/libtomahawk/widgets/combobox.cpp
index 29be3bac2..6a53b8fb5 100644
--- a/src/libtomahawk/widgets/combobox.cpp
+++ b/src/libtomahawk/widgets/combobox.cpp
@@ -74,7 +74,6 @@ void ComboBox::paintEvent(QPaintEvent *)
 
     QStyleOption arrowOpt = cb;
     arrowOpt.rect = arrowRect;
-    //p.drawPrimitive(QStyle::PE_IndicatorArrowDown, arrowOpt);
-    //Utils::StyleHelper::drawArrow(QStyle::PE_IndicatorArrowDown, &p, &arrowOpt);
+    StyleHelper::drawArrow(QStyle::PE_IndicatorArrowDown, &p, &arrowOpt);
 
 }