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-rw-r--r--depends/groupview/InstanceDelegate.cpp281
1 files changed, 281 insertions, 0 deletions
diff --git a/depends/groupview/InstanceDelegate.cpp b/depends/groupview/InstanceDelegate.cpp
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+/* Copyright 2013 MultiMC Contributors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "InstanceDelegate.h"
+#include <QPainter>
+#include <QTextOption>
+#include <QTextLayout>
+#include <QApplication>
+#include <QtCore/qmath.h>
+
+#include "GroupView.h"
+
+// Origin: Qt
+static void viewItemTextLayout(QTextLayout &textLayout, int lineWidth, qreal &height,
+ qreal &widthUsed)
+{
+ height = 0;
+ widthUsed = 0;
+ textLayout.beginLayout();
+ QString str = textLayout.text();
+ while (true)
+ {
+ QTextLine line = textLayout.createLine();
+ if (!line.isValid())
+ break;
+ if (line.textLength() == 0)
+ break;
+ line.setLineWidth(lineWidth);
+ line.setPosition(QPointF(0, height));
+ height += line.height();
+ widthUsed = qMax(widthUsed, line.naturalTextWidth());
+ }
+ textLayout.endLayout();
+}
+
+#define QFIXED_MAX (INT_MAX / 256)
+
+ListViewDelegate::ListViewDelegate(QObject *parent) : QStyledItemDelegate(parent)
+{
+}
+
+void drawSelectionRect(QPainter *painter, const QStyleOptionViewItemV4 &option,
+ const QRect &rect)
+{
+ if ((option.state & QStyle::State_Selected))
+ painter->fillRect(rect, option.palette.brush(QPalette::Highlight));
+ else
+ {
+ QColor backgroundColor = option.palette.color(QPalette::Background);
+ backgroundColor.setAlpha(160);
+ painter->fillRect(rect, QBrush(backgroundColor));
+ }
+}
+
+void drawFocusRect(QPainter *painter, const QStyleOptionViewItemV4 &option, const QRect &rect)
+{
+ if (!(option.state & QStyle::State_HasFocus))
+ return;
+ QStyleOptionFocusRect opt;
+ opt.direction = option.direction;
+ opt.fontMetrics = option.fontMetrics;
+ opt.palette = option.palette;
+ opt.rect = rect;
+ // opt.state = option.state | QStyle::State_KeyboardFocusChange |
+ // QStyle::State_Item;
+ auto col = option.state & QStyle::State_Selected ? QPalette::Highlight : QPalette::Base;
+ opt.backgroundColor = option.palette.color(col);
+ // Apparently some widget styles expect this hint to not be set
+ painter->setRenderHint(QPainter::Antialiasing, false);
+
+ QStyle *style = option.widget ? option.widget->style() : QApplication::style();
+
+ style->drawPrimitive(QStyle::PE_FrameFocusRect, &opt, painter, option.widget);
+
+ painter->setRenderHint(QPainter::Antialiasing);
+}
+
+// TODO this can be made a lot prettier
+void drawProgressOverlay(QPainter *painter, const QStyleOptionViewItemV4 &option,
+ const int value, const int maximum)
+{
+ if (maximum == 0 || value == maximum)
+ {
+ return;
+ }
+
+ painter->save();
+
+ qreal percent = (qreal)value / (qreal)maximum;
+ QColor color = option.palette.color(QPalette::Dark);
+ color.setAlphaF(0.70f);
+ painter->setBrush(color);
+ painter->setPen(QPen(QBrush(), 0));
+ painter->drawPie(option.rect, 90 * 16, -percent * 360 * 16);
+
+ painter->restore();
+}
+
+static QSize viewItemTextSize(const QStyleOptionViewItemV4 *option)
+{
+ QStyle *style = option->widget ? option->widget->style() : QApplication::style();
+ QTextOption textOption;
+ textOption.setWrapMode(QTextOption::WrapAtWordBoundaryOrAnywhere);
+ QTextLayout textLayout;
+ textLayout.setTextOption(textOption);
+ textLayout.setFont(option->font);
+ textLayout.setText(option->text);
+ const int textMargin =
+ style->pixelMetric(QStyle::PM_FocusFrameHMargin, option, option->widget) + 1;
+ QRect bounds(0, 0, 100 - 2 * textMargin, 600);
+ qreal height = 0, widthUsed = 0;
+ viewItemTextLayout(textLayout, bounds.width(), height, widthUsed);
+ const QSize size(qCeil(widthUsed), qCeil(height));
+ return QSize(size.width() + 2 * textMargin, size.height());
+}
+
+void ListViewDelegate::paint(QPainter *painter, const QStyleOptionViewItem &option,
+ const QModelIndex &index) const
+{
+ QStyleOptionViewItemV4 opt = option;
+ initStyleOption(&opt, index);
+ painter->save();
+ painter->setClipRect(opt.rect);
+
+ opt.features |= QStyleOptionViewItem::WrapText;
+ opt.text = index.data().toString();
+ opt.textElideMode = Qt::ElideRight;
+ opt.displayAlignment = Qt::AlignTop | Qt::AlignHCenter;
+
+ QStyle *style = opt.widget ? opt.widget->style() : QApplication::style();
+
+ // const int iconSize = style->pixelMetric(QStyle::PM_IconViewIconSize);
+ const int iconSize = 48;
+ QRect iconbox = opt.rect;
+ const int textMargin = style->pixelMetric(QStyle::PM_FocusFrameHMargin, 0, opt.widget) + 1;
+ QRect textRect = opt.rect;
+ QRect textHighlightRect = textRect;
+ // clip the decoration on top, remove width padding
+ textRect.adjust(textMargin, iconSize + textMargin + 5, -textMargin, 0);
+
+ textHighlightRect.adjust(0, iconSize + 5, 0, 0);
+
+ // draw background
+ {
+ // FIXME: unused
+ // QSize textSize = viewItemTextSize ( &opt );
+ QPalette::ColorGroup cg;
+ QStyleOptionViewItemV4 opt2(opt);
+
+ if ((opt.widget && opt.widget->isEnabled()) || (opt.state & QStyle::State_Enabled))
+ {
+ if (!(opt.state & QStyle::State_Active))
+ cg = QPalette::Inactive;
+ else
+ cg = QPalette::Normal;
+ }
+ else
+ {
+ cg = QPalette::Disabled;
+ }
+ opt2.palette.setCurrentColorGroup(cg);
+
+ // fill in background, if any
+ if (opt.backgroundBrush.style() != Qt::NoBrush)
+ {
+ QPointF oldBO = painter->brushOrigin();
+ painter->setBrushOrigin(opt.rect.topLeft());
+ painter->fillRect(opt.rect, opt.backgroundBrush);
+ painter->setBrushOrigin(oldBO);
+ }
+
+ if (opt.showDecorationSelected)
+ {
+ drawSelectionRect(painter, opt2, opt.rect);
+ drawFocusRect(painter, opt2, opt.rect);
+ // painter->fillRect ( opt.rect, opt.palette.brush ( cg, QPalette::Highlight ) );
+ }
+ else
+ {
+
+ // if ( opt.state & QStyle::State_Selected )
+ {
+ // QRect textRect = subElementRect ( QStyle::SE_ItemViewItemText, opt,
+ // opt.widget );
+ // painter->fillRect ( textHighlightRect, opt.palette.brush ( cg,
+ // QPalette::Highlight ) );
+ drawSelectionRect(painter, opt2, textHighlightRect);
+ drawFocusRect(painter, opt2, textHighlightRect);
+ }
+ }
+ }
+
+ // draw the icon
+ {
+ QIcon::Mode mode = QIcon::Normal;
+ if (!(opt.state & QStyle::State_Enabled))
+ mode = QIcon::Disabled;
+ else if (opt.state & QStyle::State_Selected)
+ mode = QIcon::Selected;
+ QIcon::State state = opt.state & QStyle::State_Open ? QIcon::On : QIcon::Off;
+
+ iconbox.setHeight(iconSize);
+ opt.icon.paint(painter, iconbox, Qt::AlignCenter, mode, state);
+ }
+ // set the text colors
+ QPalette::ColorGroup cg =
+ opt.state & QStyle::State_Enabled ? QPalette::Normal : QPalette::Disabled;
+ if (cg == QPalette::Normal && !(opt.state & QStyle::State_Active))
+ cg = QPalette::Inactive;
+ if (opt.state & QStyle::State_Selected)
+ {
+ painter->setPen(opt.palette.color(cg, QPalette::HighlightedText));
+ }
+ else
+ {
+ painter->setPen(opt.palette.color(cg, QPalette::Text));
+ }
+
+ // draw the text
+ QTextOption textOption;
+ textOption.setWrapMode(QTextOption::WrapAtWordBoundaryOrAnywhere);
+ textOption.setTextDirection(opt.direction);
+ textOption.setAlignment(QStyle::visualAlignment(opt.direction, opt.displayAlignment));
+ QTextLayout textLayout;
+ textLayout.setTextOption(textOption);
+ textLayout.setFont(opt.font);
+ textLayout.setText(opt.text);
+
+ qreal width, height;
+ viewItemTextLayout(textLayout, textRect.width(), height, width);
+
+ const int lineCount = textLayout.lineCount();
+
+ const QRect layoutRect = QStyle::alignedRect(
+ opt.direction, opt.displayAlignment, QSize(textRect.width(), int(height)), textRect);
+ const QPointF position = layoutRect.topLeft();
+ for (int i = 0; i < lineCount; ++i)
+ {
+ const QTextLine line = textLayout.lineAt(i);
+ line.draw(painter, position);
+ }
+
+ drawProgressOverlay(painter, opt,
+ index.data(GroupViewRoles::ProgressValueRole).toInt(),
+ index.data(GroupViewRoles::ProgressMaximumRole).toInt());
+
+ painter->restore();
+}
+
+QSize ListViewDelegate::sizeHint(const QStyleOptionViewItem &option,
+ const QModelIndex &index) const
+{
+ QStyleOptionViewItemV4 opt = option;
+ initStyleOption(&opt, index);
+ opt.features |= QStyleOptionViewItem::WrapText;
+ opt.text = index.data().toString();
+ opt.textElideMode = Qt::ElideRight;
+ opt.displayAlignment = Qt::AlignTop | Qt::AlignHCenter;
+
+ QStyle *style = opt.widget ? opt.widget->style() : QApplication::style();
+ const int textMargin =
+ style->pixelMetric(QStyle::PM_FocusFrameHMargin, &option, opt.widget) + 1;
+ int height = 48 + textMargin * 2 + 5; // TODO: turn constants into variables
+ QSize szz = viewItemTextSize(&opt);
+ height += szz.height();
+ // FIXME: maybe the icon items could scale and keep proportions?
+ QSize sz(100, height);
+ return sz;
+}