/****************************************************************
**?BlackPixmapItem
**?自定義graphicsitem，用于加載圖片
**
**?blackpixmapitem.h
**
**?Zhou?Tao???2017-05-18T11:09:16
**
**?QQ?:?741301964
**
**?深圳市XX電子股份有限公司
**
****************************************************************/
#include?“blackpixmapitem.h“

BlackPixmapItem::BlackPixmapItem（int?width?int?height?bool?isPreview）:
????m_nWidth（width）m_nHeight（height）m_bIsPreview（isPreview）{
}

QRectF?BlackPixmapItem::boundingRect（）?const
{
????return?QRectF（0?0?m_nWidth?m_nHeight）;
}

//設置item圖片
void?BlackPixmapItem::setPixmap（const?QPixmap?Pixmap）
{
????prepareGeometryChange（）;
????pixmap?=?Pixmap;
????update（）;
}

//設置item大小
void?BlackPixmapItem::setSize（int?w?int?h）
{
????prepareGeometryChange（）;
????m_nWidth?=?w;
????m_nHeight?=?h;
}

//item縮放
void?BlackPixmapItem::setZoom（qreal?zoomFactor）
{
????QTransform?transform;
????transform.scale（zoomFactorzoomFactor）;
????transform.translate（1024*（1.0-zoomFactor）/2600*（1.0-zoomFactor）/2）;
????qDebug（）<<1024*（1.0-zoomFactor）/2<<600*（1.0-zoomFactor）/2;
????setTransform（transform）;
}

//清除圖片
void?BlackPixmapItem::clearPixmap（）
{
????QPixmap?clearPix?=?QPixmap（）;
????pixmap?=?clearPix;
????update（）;
}

#include?
//繪制item
void?BlackPixmapItem::paint（QPainter?*painter?const?QstyleOptionGraphicsItem?*option?QWidget?*widget）
{
????Q_UNUSED（widget）;
????Q_UNUSED（option）;

????painter->setBrush（Qt::black）;//背景填充黑色
????painter->drawRoundedRect（0?0?m_nWidthm_nHeight?2?2）;
????painter->setRenderHint（QPainter::SmoothPixmapTransformQt::SmoothTransformation）;
????//繪制圖片
????if（!pixmap.isNull（））
????painter->drawPixmap（（m_nWidth-pixmap.width（））/2?（m_nHeight-pixmap.height（））/2
????????????????????????pixmap.width（）pixmap.height（）pixmap）;

????//陰影遮罩
????/*if（isSelected）
????{
????????painter->setBrush（Qt::gray）;//背景填充
????????painter->setOpacity（0.5）;//透明度
????????painter->drawRoundedRect（0?0?m_nWidthm_nHeight?2?2）;
????}*/
}

//點擊放大
void?BlackPixmapItem::setFocusIn（）
{
????qDebug（）<<“BlackPixmapItem?focusInEvent?“;
????//isSelected?=?true;
????//update（）;//更新
????setScale（1.05）;//放大
}

//釋放縮小
void?BlackPixmapItem::setFocusOut（）
{
????qDebug（）<<“BlackPixmapItem?focusOutEvent?“;
????//isSelected?=?false;
????//update（）;//更新
????setScale（1）;//縮小
}

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----
?????目錄???????????0??2017-12-28?00:26??ImageView\
?????文件????????2545??2017-06-14?09:50??ImageView\blackpixmapitem.cpp
?????文件????????1857??2017-06-05?17:17??ImageView\blackpixmapitem.h
?????文件????????6267??2017-06-05?17:17??ImageView\customgraphicsview.cpp
?????文件????????2288??2017-06-05?17:17??ImageView\customgraphicsview.h
?????目錄???????????0??2017-06-14?10:04??ImageView\image\
?????文件????????2986??2017-06-05?17:17??ImageView\imageloadthread.cpp
?????文件????????1531??2017-06-05?17:17??ImageView\imageloadthread.h
?????文件???????12722??2017-06-14?09:59??ImageView\imagepreview.cpp
?????文件????????3143??2017-06-14?09:22??ImageView\imagepreview.h
?????文件???????18851??2017-06-14?10:01??ImageView\imageview.cpp
?????文件????????4812??2017-06-14?09:26??ImageView\imageview.h
?????文件?????????630??2017-06-13?17:47??ImageView\ImageView.pro
?????文件???????23908??2017-12-28?00:26??ImageView\ImageView.pro.user
?????文件???????23853??2017-06-14?09:17??ImageView\ImageView.pro.user.0577304
?????文件?????????183??2017-06-05?17:11??ImageView\main.cpp
?????文件?????????352??2017-06-14?09:38??ImageView\mainwindow.cpp
?????文件?????????404??2017-06-13?17:15??ImageView\mainwindow.h
?????文件?????????654??2017-06-05?17:11??ImageView\mainwindow.ui