stylehint.cpp

/*
 *   Virtuality Style for Qt4 and Qt5
 *   Copyright 2009-2014 by Thomas Lübking <thomas.luebking@gmail.com>
 *
 *   This program is free software; you can redistribute it and/or modify
 *   it under the terms of the GNU General Public License version 2
 *
 *   This program is distributed in the hope that it will be useful,
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *   GNU General Public License for more details
 *
 *   You should have received a copy of the GNU General Public
 *   License along with this program; if not, write to the
 *   Free Software Foundation, Inc.,
 *   51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 */

#include <QApplication>
#include <QComboBox>
#include <QEvent>
#include <QFrame>
#include <QMenuBar>
#include "FX.h"
#include "virtuality.h"
#ifndef QT_NO_DBUS
#include "macmenu.h"
#endif
#include "makros.h"

#include <QStyleOptionTab>
#include <QTabBar>
#include <QTabWidget>

#include <QtDebug>

using namespace BE;

static const QStyle::StyleHint SH_KCustomStyleElement = (QStyle::StyleHint)0xff000001;

int Style::styleHint(StyleHint hint, const QStyleOption *option, const QWidget *widget, QStyleHintReturn *returnData ) const
{
    switch (hint)
    {
    case SH_EtchDisabledText:
    case SH_DitherDisabledText: //
        return false; // Both look CRAP! (win has etching)
    case SH_ScrollBar_MiddleClickAbsolutePosition:
        return true; // support middle click jumping
    case SH_ScrollBar_LeftClickAbsolutePosition:
        return false; // annoying
    case SH_ScrollBar_ScrollWhenPointerLeavesControl:
        return true; // UIs are no ego shooters...
    case SH_TabBar_Alignment: {
        if (qobject_cast<const QTabWidget*>(widget))
            return Qt::AlignCenter;
#if 0 // this does not work - Qt screws the tear indicator positon... or is it me?
        QTabBar::Shape shape = QTabBar::RoundedNorth;
        if HAVE_OPTION(tab, Tab)
            shape = tab->shape;
        else if (const QTabBar *tabBar = qobject_cast<const QTabBar*>(widget))
            shape = tabBar->shape();
        else if (const QTabWidget *tabWidget = qobject_cast<const QTabWidget*>(widget))
            shape = (QTabBar::Shape)(tabWidget->tabPosition());
        switch (shape) {
        case QTabBar::RoundedNorth:
        case QTabBar::TriangularNorth:
        case QTabBar::RoundedWest:
        case QTabBar::TriangularWest:
            return Qt::AlignLeft;
        case QTabBar::RoundedSouth:
        case QTabBar::TriangularSouth:
        case QTabBar::RoundedEast:
        case QTabBar::TriangularEast:
            return Qt::AlignRight;
        }
#endif
        return Qt::AlignLeft;
    }
    case SH_Header_ArrowAlignment:
        return Qt::AlignLeft; // we move it to text center though...
    case SH_Slider_SnapToValue:
        return true; // yes, better then snapping after releasing the slider!
    case SH_Slider_SloppyKeyEvents:
        return true; // allow left/right & top/bottom on both orientations
    case SH_ProgressDialog_CenterCancelButton:
        return false; // looks strange
    case SH_ProgressDialog_TextLabelAlignment:
        return Qt::AlignCenter; // is this used anywhere?
    case SH_PrintDialog_RightAlignButtons:
        return true; // ok/cancel just belong there
    case SH_MainWindow_SpaceBelowMenuBar:
#ifndef QT_NO_DBUS
        if (MacMenu::isActive())
        if (const QMenuBar *menubar = qobject_cast<const QMenuBar*>(widget))
        if (MacMenu::manages(menubar))
        if (menubar->height() == 0)
        if (!menubar->actions().isEmpty())
        {   // we trick menubars if we use macmenus - hehehe...
            // NOTICE the final result NEEDS to be > "0" (i.e. "1") to avoid side effects...
            return -menubar->actionGeometry(menubar->actions().first()).height();
        }
#endif
        return 0; // no space between menus and docks (we need padding rather than margin)
///    case SH_FontDialog_SelectAssociatedText: // Select the text in the line edit, or when selecting an item from the listbox, or when the line edit receives focus, as done on Windows.
///    case SH_Menu_AllowActiveAndDisabled: // Allows disabled menu items to be active.
    case QStyle::SH_Menu_FadeOutOnHide:
        return false;
    case SH_Menu_SpaceActivatesItem:
        return true; // yes
    case SH_Menu_SubMenuPopupDelay:
        return config.menu.delay;
//         return 96; // motif value - don't have time...
    case SH_Menu_Scrollable:
        return true; // better scroll than fold around covering the desktop!
    case SH_Menu_SloppySubMenus:
        return true; // don't hide submenus immediately please
    case SH_ScrollView_FrameOnlyAroundContents: // YES - period.
        return (!(widget && widget->inherits("QComboBoxListView")));
    case SH_MenuBar_AltKeyNavigation:
#if QT_VERSION < 0x050000
        return true;
#else
        return false;
#endif
    case SH_ComboBox_ListMouseTracking:
    case SH_Menu_MouseTracking:
    case SH_MenuBar_MouseTracking:
        return true; // feedback to the user please!
    case SH_Menu_FillScreenWithScroll:
        return false; // don't trash the desktop
    case SH_ItemView_ChangeHighlightOnFocus:
        return true; //config.fadeInactive; // Gray out selected items when losing focus.
///    case SH_Widget_ShareActivation: // Turn on sharing activation with floating modeless dialogs.
    case SH_TabBar_SelectMouseType:
        // NOTICE WORKAROUND! MouseButtonRelease causes trouble with konqueror's doubleclicking
        return appType == Konqueror ? QEvent::MouseButtonPress : QEvent::MouseButtonRelease; // =)
    case SH_TabBar_PreferNoArrows:
        return false; // the can grow horribly big...
    case SH_ComboBox_Popup: // Allows popups as a combobox drop-down menu.
        return false; // shitty slider, paints radiobuttons, requires object casting testing for geometry calculation
    case SH_ComboBox_PopupFrameStyle:
        return QFrame::StyledPanel | QFrame::Plain;
///    case SH_Workspace_FillSpaceOnMaximize: // The workspace should maximize the client area.
    case SH_TitleBar_NoBorder:
        return true; // The title bar has no border.
    case SH_ScrollBar_RollBetweenButtons:
        return true;
    case SH_Slider_StopMouseOverSlider:
        return true; // Stops auto-repeat when the slider reaches the mouse position.
    case SH_BlinkCursorWhenTextSelected:
//         false; // that's annoying but ...
        return true; // ... great, this is now completely ignored anyway winblows ftw :-(
    case SH_RichText_FullWidthSelection:
        return true;
    case SH_GroupBox_TextLabelVerticalAlignment:
        return Qt::AlignTop; // we've no halfheight frame
    case SH_GroupBox_TextLabelColor:
        return QPalette::WindowText;
///    case SH_DialogButtons_DefaultButton: // Which button gets the default status in a dialog's button widget.
    case SH_DialogButtonLayout:
        return config.dialogBtnLayout;
    case SH_DialogButtonBox_ButtonsHaveIcons:
        return false; // no way
    case SH_ToolBox_SelectedPageTitleBold:
        return true; // yes please
    case SH_LineEdit_PasswordCharacter:
    { // configurable...
        const QFontMetrics &fm = option ? option->fontMetrics :
                                (widget ? widget->fontMetrics() : QFontMetrics(QFont()));
        if (fm.inFont(QChar(config.input.pwEchoChar)))
            return config.input.pwEchoChar;
        return '*';
        }
    case SH_Table_GridLineColor:
        if (option)
            return FX::blend(FCOLOR(Base), FCOLOR(Text),6,1).rgb();
        return -1;
    case SH_UnderlineShortcut:
        return config.mnemonic == Qt::TextShowMnemonic;
    case SH_SpinBox_AnimateButton:
        return true; // feedback to the user, please
    case SH_SpinBox_ClickAutoRepeatRate:
        return 150;
    case SH_SpinBox_KeyPressAutoRepeatRate:
        return 75;
    case SH_ToolTipLabel_Opacity:
        return 255; // uses ARGB, done in drawToolTip
    case SH_DrawMenuBarSeparator:
        return false; // NO WAY!!!
    case SH_TitleBar_ModifyNotification:
        return true; // add '*' to window title (or however WM manages it)
    case SH_Button_FocusPolicy:
        return Qt::StrongFocus;
#if QT_VERSION < 0x050000
    case SH_MenuBar_DismissOnSecondClick:
        return true; // simple close popups
#endif
    case SH_MessageBox_UseBorderForButtonSpacing:
        return false; // hähh?
    case SH_MessageBox_CenterButtons:
        return false;
    case SH_MessageBox_TextInteractionFlags:
        return true;
    case SH_TitleBar_AutoRaise:
        return true; // hover titlebar buttons in MDI
    case SH_ToolButton_PopupDelay:
        return 222; // everyone can do a click in 150ms - but it feels wrong.
///    case SH_FocusFrame_Mask: // The mask of the focus frame.
    case SH_RubberBand_Mask: // The mask of the rubber band.
        return false; // we have an opaque one
///    case SH_WindowFrame_Mask: // The mask of the window frame.
    case SH_SpinControls_DisableOnBounds:
        return true; // yeah - don't trick the user
    case SH_Dial_BackgroundRole:
        return QPalette::Window;
    case SH_ComboBox_LayoutDirection:
        return config.leftHanded ? Qt::RightToLeft : Qt::LeftToRight;
    case SH_ItemView_ArrowKeysNavigateIntoChildren:
        return true;
    case SH_ItemView_EllipsisLocation:
        return Qt::AlignTrailing;
    case SH_ItemView_ShowDecorationSelected:
        return true; // full width selection
    case SH_ItemView_ActivateItemOnSingleClick: {
        if (config.macStyle) {
            QWidget *w = qApp->focusWidget();
#if QT_VERSION >= 0x060000
            return !(w && w->inherits("QtPrivate::QCalendarView"));
#else
            return !(w && w->inherits("QCalendarView"));
#endif
        }
        return false;
    }
    case SH_WizardStyle:
        return config.macStyle ? 2 : 1; // QWizard::MacStyle / QWizard::ModernStyle

    case SH_FormLayoutWrapPolicy:
        return 0; //  QFormLayout::RowWrapPolicy - don't wrap
    case SH_FormLayoutFieldGrowthPolicy:
        return 1; // WORKAROUND: KDE is often buggy w/ QFormLayout::FieldsStayAtSizeHint
//         return config.macStyle ? 0 : 1; // QFormLayout::FieldsStayAtSizeHint / ExpandingFieldsGrow / AllNonFixedFieldsGrow
    case SH_FormLayoutFormAlignment:
        // WORKAROUND: aligning center is pointless for growing items. centering only fixed sizers is inconsistent
        return (Qt::AlignLeft | Qt::AlignTop);
//         return (Qt::AlignHCenter | Qt::AlignTop);
    case SH_FormLayoutLabelAlignment:
        return Qt::AlignRight;
    case SH_ItemView_PaintAlternatingRowColorsForEmptyArea:
        return true;
    /***** @todo this got canned, moved to QPlatformTheme
    case SH_SpellCheckUnderlineStyle:
        return config.macStyle ? 4 : 6; // DashDotLine / WaveUnderline
    *****/

    case SH_KCustomStyleElement:
    {
        if (!widget)
            return 0;
        int id = elementId(widget->objectName());
        if (!id)
            qWarning("Unsupported KCustomStyleElement requested: %s", widget->objectName().toLatin1().data());
        return id;
    }
    default:
        return QCommonStyle::styleHint(hint, option, widget, returnData);
    } // switch
}