1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221
|
/* Copyright © 2003-2007 Fredrik Höglund <fredrik@kde.org>
* (c)GPL2 (c)GPL3
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public
* License version 2 as published by the Free Software Foundation.
*
* 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; see the file COPYING. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
/*
* additional code: Ketmar // Vampire Avalon (psyc://ketmar.no-ip.org/~Ketmar)
*/
#include <QDebug>
#include <QPainter>
#include <QMouseEvent>
#include "previewwidget.h"
#include "crtheme.h"
#include <X11/Xlib.h>
#include <X11/Xcursor/Xcursor.h>
#include <QX11Info>
#include <QWindow>
namespace {
// Preview cursors
const char *const cursorNames[] = {
"left_ptr",
"left_ptr_watch",
"wait",
"pointing_hand",
"whats_this",
"ibeam",
"size_all",
"size_fdiag",
"cross",
"split_h",
"size_ver",
"size_hor",
"size_bdiag",
"split_v",
};
const int numCursors = 9; // The number of cursors from the above list to be previewed
const int previewSize = 24; // The nominal cursor size to be used in the preview widget
const int cursorSpacing = 20; // Spacing between preview cursors
const int widgetMinWidth = 10; // The minimum width of the preview widget
const int widgetMinHeight = 48; // The minimum height of the preview widget
}
///////////////////////////////////////////////////////////////////////////////
class PreviewCursor
{
public:
PreviewCursor (const XCursorThemeData &theme, const QString &name);
~PreviewCursor () {}
const QPixmap &pixmap () const { return mPixmap; }
int width () const { return mPixmap.width(); }
int height () const { return mPixmap.height(); }
inline QRect rect () const;
void setPosition (const QPoint &p) { mPos = p; }
void setPosition (int x, int y) { mPos = QPoint(x, y); }
QPoint position () const { return mPos; }
operator const xcb_cursor_t& () const { return mCursorHandle; }
operator const QPixmap& () const { return pixmap(); }
private:
QPixmap mPixmap;
xcb_cursor_t mCursorHandle;
QPoint mPos;
};
///////////////////////////////////////////////////////////////////////////////
PreviewCursor::PreviewCursor(const XCursorThemeData &theme, const QString &name)
{
// Create the preview pixmap
QImage image = theme.loadImage(name, previewSize);
if (image.isNull()) return;
int maxSize = previewSize*2;
if (image.height() > maxSize || image.width() > maxSize)
image = image.scaled(maxSize, maxSize, Qt::KeepAspectRatio, Qt::SmoothTransformation);
mPixmap = QPixmap::fromImage(image);
// load the cursor
mCursorHandle = theme.loadCursorHandle(name, previewSize);
}
QRect PreviewCursor::rect() const
{
return QRect(mPos, mPixmap.size()).adjusted(-(cursorSpacing/2), -(cursorSpacing/2), cursorSpacing/2, cursorSpacing/2);
}
///////////////////////////////////////////////////////////////////////////////
PreviewWidget::PreviewWidget(QWidget *parent) : QWidget(parent)
{
setMouseTracking(true);
mCurrent = NULL;
}
PreviewWidget::~PreviewWidget()
{
qDeleteAll(mList);
mList.clear();
}
// Since Qt5, wrapping a Cursor handle with QCursor is no longer supported.
// So we have to do it ourselves. I really hate Qt 5!
void PreviewWidget::setCursorHandle(xcb_cursor_t cursorHandle)
{
WId wid = nativeParentWidget()->windowHandle()->winId();
xcb_change_window_attributes(QX11Info::connection(), wid, XCB_CW_CURSOR, &cursorHandle);
xcb_flush(QX11Info::connection());
}
QSize PreviewWidget::sizeHint() const
{
int totalWidth = 0, maxHeight = 0;
for (const PreviewCursor *c : qAsConst(mList))
{
totalWidth += c->width();
maxHeight = qMax(c->height(), maxHeight);
}
totalWidth += (mList.count()-1)*cursorSpacing;
maxHeight = qMax(maxHeight, widgetMinHeight);
return QSize(qMax(totalWidth, widgetMinWidth), qMax(height(), maxHeight));
}
void PreviewWidget::layoutItems()
{
if (!mList.isEmpty())
{
QSize size = sizeHint();
int cursorWidth = size.width()/mList.count();
int nextX = (width()-size.width())/2;
for (PreviewCursor *c : qAsConst(mList))
{
c->setPosition(nextX+(cursorWidth-c->width())/2, (height()-c->height())/2);
nextX += cursorWidth;
}
}
mNeedLayout = false;
}
void PreviewWidget::setTheme(const XCursorThemeData &theme)
{
qDeleteAll(mList);
mList.clear();
for (int i = 0; i < numCursors; ++i) mList << new PreviewCursor(theme, cursorNames[i]);
mNeedLayout = true;
updateGeometry();
mCurrent = NULL;
update();
}
void PreviewWidget::clearTheme()
{
qDeleteAll(mList);
mList.clear();
mCurrent = NULL;
update();
}
void PreviewWidget::paintEvent(QPaintEvent *)
{
QPainter p(this);
if (mNeedLayout) layoutItems();
for (const PreviewCursor *c : qAsConst(mList))
{
if (c->pixmap().isNull()) continue;
p.drawPixmap(c->position(), *c);
}
}
void PreviewWidget::mouseMoveEvent(QMouseEvent *e)
{
if (mNeedLayout) layoutItems();
for (const PreviewCursor *c : qAsConst(mList))
{
if (c->rect().contains(e->pos()))
{
if (c != mCurrent)
{
// NOTE: we have to set the Qt cursor value to something other than Qt::ArrowCursor
// Otherwise, though we set the xcursor handle to the underlying window, Qt still
// thinks that the current cursor is Qt::ArrowCursor and will not restore the cursor
// later when we call setCursor(Qt::ArrowCursor). So, we set it to BlankCursor to
// cheat Qt so it knows that the current cursor is not Qt::ArrowCursor.
// This is a dirty hack, but without this, Qt cannot restore Qt::ArrowCursor later.
setCursor(Qt::BlankCursor);
setCursorHandle(*c);
mCurrent = c;
}
return;
}
}
setCursor(Qt::ArrowCursor);
mCurrent = NULL;
}
void PreviewWidget::resizeEvent(QResizeEvent *)
{
if (!mList.isEmpty()) mNeedLayout = true;
}
|