Merge pull request #6487

eec7757 qt: Introduce PlatformStyle (Wladimir J. van der Laan)

1 files changed, 147 insertions, 0 deletions

diff --git a/src/qt/platformstyle.cpp b/src/qt/platformstyle.cpp
new file mode 100644
index 0000000000..11cbc7a47c
--- /dev/null
+++ b/src/qt/platformstyle.cpp
@@ -0,0 +1,147 @@
+// Copyright (c) 2015 The Bitcoin Core developers
+// Distributed under the MIT software license, see the accompanying
+// file COPYING or http://www.opensource.org/licenses/mit-license.php.
+
+#include "platformstyle.h"
+
+#include "guiconstants.h"
+
+#include <QApplication>
+#include <QColor>
+#include <QIcon>
+#include <QImage>
+#include <QPalette>
+#include <QPixmap>
+
+static const struct {
+    const char *platformId;
+    /** Show images on push buttons */
+    const bool imagesOnButtons;
+    /** Colorize single-color icons */
+    const bool colorizeIcons;
+    /** Extra padding/spacing in transactionview */
+    const bool useExtraSpacing;
+} platform_styles[] = {
+    {"macosx", false, false, true},
+    {"windows", true, false, false},
+    /* Other: linux, unix, ... */
+    {"other", true, true, false}
+};
+static const unsigned platform_styles_count = sizeof(platform_styles)/sizeof(*platform_styles);
+
+namespace {
+/* Local functions for colorizing single-color images */
+
+void MakeSingleColorImage(QImage& img, const QColor& colorbase)
+{
+    img = img.convertToFormat(QImage::Format_ARGB32);
+    for (int x = img.width(); x--; )
+    {
+        for (int y = img.height(); y--; )
+        {
+            const QRgb rgb = img.pixel(x, y);
+            img.setPixel(x, y, qRgba(colorbase.red(), colorbase.green(), colorbase.blue(), qAlpha(rgb)));
+        }
+    }
+}
+
+QIcon ColorizeIcon(const QIcon& ico, const QColor& colorbase)
+{
+    QIcon new_ico;
+    QSize sz;
+    Q_FOREACH(sz, ico.availableSizes())
+    {
+        QImage img(ico.pixmap(sz).toImage());
+        MakeSingleColorImage(img, colorbase);
+        new_ico.addPixmap(QPixmap::fromImage(img));
+    }
+    return new_ico;
+}
+
+QImage ColorizeImage(const QString& filename, const QColor& colorbase)
+{
+    QImage img(filename);
+    MakeSingleColorImage(img, colorbase);
+    return img;
+}
+
+QIcon ColorizeIcon(const QString& filename, const QColor& colorbase)
+{
+    return QIcon(QPixmap::fromImage(ColorizeImage(filename, colorbase)));
+}
+
+}
+
+
+PlatformStyle::PlatformStyle(const QString &name, bool imagesOnButtons, bool colorizeIcons, bool useExtraSpacing):
+    name(name),
+    imagesOnButtons(imagesOnButtons),
+    colorizeIcons(colorizeIcons),
+    useExtraSpacing(useExtraSpacing),
+    singleColor(0,0,0),
+    textColor(0,0,0)
+{
+    // Determine icon highlighting color
+    if (colorizeIcons) {
+        const QColor colorHighlightBg(QApplication::palette().color(QPalette::Highlight));
+        const QColor colorHighlightFg(QApplication::palette().color(QPalette::HighlightedText));
+        const QColor colorText(QApplication::palette().color(QPalette::WindowText));
+        const int colorTextLightness = colorText.lightness();
+        QColor colorbase;
+        if (abs(colorHighlightBg.lightness() - colorTextLightness) < abs(colorHighlightFg.lightness() - colorTextLightness))
+            colorbase = colorHighlightBg;
+        else
+            colorbase = colorHighlightFg;
+        singleColor = colorbase;
+    }
+    // Determine text color
+    textColor = QColor(QApplication::palette().color(QPalette::WindowText));
+}
+
+QImage PlatformStyle::SingleColorImage(const QString& filename) const
+{
+    if (!colorizeIcons)
+        return QImage(filename);
+    return ColorizeImage(filename, SingleColor());
+}
+
+QIcon PlatformStyle::SingleColorIcon(const QString& filename) const
+{
+    if (!colorizeIcons)
+        return QIcon(filename);
+    return ColorizeIcon(filename, SingleColor());
+}
+
+QIcon PlatformStyle::SingleColorIcon(const QIcon& icon) const
+{
+    if (!colorizeIcons)
+        return icon;
+    return ColorizeIcon(icon, SingleColor());
+}
+
+QIcon PlatformStyle::TextColorIcon(const QString& filename) const
+{
+    return ColorizeIcon(filename, TextColor());
+}
+
+QIcon PlatformStyle::TextColorIcon(const QIcon& icon) const
+{
+    return ColorizeIcon(icon, TextColor());
+}
+
+const PlatformStyle *PlatformStyle::instantiate(const QString &platformId)
+{
+    for (unsigned x=0; x<platform_styles_count; ++x)
+    {
+        if (platformId == platform_styles[x].platformId)
+        {
+            return new PlatformStyle(
+                    platform_styles[x].platformId,
+                    platform_styles[x].imagesOnButtons,
+                    platform_styles[x].colorizeIcons,
+                    platform_styles[x].useExtraSpacing);
+        }
+    }
+    return 0;
+}
+