标签：通用 路径 ddt http ant graphics tca 设置 string
写在前面
本系列博客URL：
http://www.cnblogs.com/drgraph
配套软件下载地址：
http://www.czwenwu.com/YeeVingSetup.exe
配套软件含三个可执行文件：YeeVingDriver.exe，YeeVingPlayer.exe，WatchDog.exe
其中，YeeVingDriver.exe是双目触控屏的驱动程序，内含键盘鼠标钩子，安装或运行的时候有可能会当成病毒。
WatchDog.exe是无人值守软件
YeeVingPlayer.exe是广告播放软件客户端。
本系列博客是在上述三个软件研发过程中的片面记录，基本上是属于想到哪写到哪的，不系统。主要目的是自己整理归纳一下，并期望与更多朋友交流。
QQ/微信：282397369
EMail： drgraph@qq.com
需求
时钟的需求来自于广告播放软件客户端。
橱窗用户反馈：在播放屏幕上，不仅仅是需要显示视频、图片、动画、文字、PPT等多媒体素材，还希望能看到一些小插件，看到比如时钟、天气预报等内容。当然，在界面定制的时候，指定一个小块显示相应内容就OK。
初步解决
先来处理时钟。
既然先说了小插件，就先参考一下WINDOWS中的小工具。
当然，时钟会有很多风格，先出一版这种效果的。
其实就是一个画图操作，不过想要改这个UI效果，如果用代码来实现，好象还得要比较繁琐的支持，在网上看到一种用图片叠加起来的时钟。
把几个图片素材下载下来，再重新命名一下。
最终就是采用Gdiplus技术，把这几张图片按顺序画出：
FGraphics->DrawImage(&image, x, y, w, h);
该转的就转一下。
Gdiplus::Bitmap * bitmap = RotateImage(&image, locked_theta, w, h);
float dx = x + w / 2 - bitmap->GetWidth() / 2;
float dy = y + h / 2 - bitmap->GetHeight() / 2;
FGraphics->DrawImage(bitmap, dx, dy, bitmap->GetWidth(), bitmap->GetHeight());
delete bitmap;
好象也没有什么好说的。可以拼成这种效果
模块化
在实现的过程中，突然发现，这种由多张图片叠加组成的场合还有一些，干脆提炼成一个模块，后续可以直接调用。
这里面最主要的是配置，每张图片都可以指定。最容易想到的解决方案就是采用XML方式来定义。
比如上面的时钟，可以用XML定义如下：
<GdiMeta>
<item angle="0" centerx="true" centery="true" height="1" picfilename="res\clock\background.png" width="1"/>
<item angle="284" centerx="true" centery="true" height="1" name="hour" picfilename="res\clock\Hour.png" width="0"/>
<item angle="176" centerx="true" centery="true" height="1" name="minute" picfilename="res\clock\Minute.png" width="0"/>
<item angle="150" centerx="true" centery="true" height="1" name="second" picfilename="res\clock\Second.png" width="0"/>
<item centerx="true" centery="true" height="1" picfilename="res\clock\Highlight.png" width="1"/>
</GdiMeta>
既然是自己用，那就先定好格式。几张图片就用几个节点。每个节点含以下属性：
picfilename为图片文件名，采用相对路径，也可以是绝对路径
angle为旋转角度，指绕本图像中心的旋转角度
centerx、centery为横向、纵向中心对齐标志
height、width为高宽比例，指该图形在最终图形中所占的高宽比例。
name为本图片对应名称，后续可以根据该名称进行相应值的修改。
思路理清了，模块化也就容易了，头文件
c
lass TCbwGdiMeta : public TRectangle { typedef TRectangle inherited; Gdiplus::Graphics * FGraphics; CbwXmlNode * FXmlContent; void __fastcall DrawXmlNode(CbwXmlNode * xmlNode, Gdiplus::RectF rf, Gdiplus::Graphics * FGraphics, Gdiplus::Brush * brush, Gdiplus::Pen * pen); UnicodeString __fastcall GetContent(); void __fastcall SetContent(UnicodeString value); void __fastcall SetXmlContent(CbwXmlNode * node); public: CBW_META_OBJECT(TCbwGdiMeta, TRectangle); virtual void __fastcall DoDraw(); // 画出对象 virtual bool __fastcall PreDraw(); void __fastcall SetProperty(UnicodeString name, UnicodeString value); // 设置XML节点属性，如 hour.angle = 100 virtual void __fastcall DoAddToXmlNode(CbwXmlNode * node); virtual void __fastcall DoGetFromXmlNode(CbwXmlNode * node, int& index); __published: __property UnicodeString Content = { read = GetContent, write = SetContent }; __property CbwXmlNode * XmlContent = { read = FXmlContent, write = SetXmlContent }; };
源文件
__fastcall TCbwGdiMeta::~TCbwGdiMeta() { delete FXmlContent; } void __fastcall TCbwGdiMeta::Initial() { ObjectClassType = cctGdiMeta; Name = THelper::FormatString("GdiMeta%d", MetaIndex[int(ObjectClassType)]); ++MetaIndex[int(ObjectClassType)]; FXmlContent = new CbwXmlNode("GdiMeta"); } bool __fastcall TCbwGdiMeta::PreDraw() { if (!inherited::PreDraw()) return false; return true; } void __fastcall TCbwGdiMeta::DoDraw() { FGraphics = GetGraphicsForRotate(Canvas); FGraphics->SetSmoothingMode(Gdiplus::SmoothingModeAntiAlias);//SmoothingModeHighQuality); TPoint p0 = TPoint(Points[0].x * Ratio, Points[0].y * Ratio); TPoint p1 = TPoint(Points[1].x * Ratio, Points[1].y * Ratio); TRect r = TTypeConvert::Points2Rect(p0, p1); Gdiplus::Brush * brush = BrushByData(BrushData, r); Gdiplus::RectF rf(r.left, r.top, r.Width(), r.Height()); Gdiplus::Pen gpen(Color2GPColor(PenData->Color), PenData->Width * Ratio); for(int i = 0; i < FXmlContent->ElementNumber; ++i) { CbwXmlNode * node = FXmlContent->Elements(i); DrawXmlNode(node, rf, FGraphics, brush, &gpen); } if(brush) delete brush; delete FGraphics; } void __fastcall TCbwGdiMeta::DrawXmlNode(CbwXmlNode * xmlNode, Gdiplus::RectF rf, Gdiplus::Graphics * FGraphics, Gdiplus::Brush * brush, Gdiplus::Pen * pen) { UnicodeString picName = xmlNode->AttributeValueByName("picFileName"); if(picName.Length()) { if(picName.Pos(L":") == 0) picName = THelper::File::GetApplicationPath() + picName; if(FileExists(picName)) { Gdiplus::Image image(picName.w_str(), false); float x = xmlNode->AttributeValueByName("x", "0").ToDouble(); float y = xmlNode->AttributeValueByName("y", "0").ToDouble(); float w = xmlNode->AttributeValueByName("width", "0").ToDouble(); float h = xmlNode->AttributeValueByName("height", "0").ToDouble(); double locked_theta = xmlNode->AttributeValueByName("angle", "0").ToDouble(); while(locked_theta >= 360) locked_theta -= 360; while(locked_theta < 0) locked_theta += 360; double width = rf.Width, height = rf.Height; x *= width; w *= width; y *= height; h *= height; if(w == 0) // 未定义宽度，则由原始宽度计算 w = image.GetWidth() * Ratio; if(h == 0) // 未定义高度，则由原始高度计算 h = image.GetHeight() * Ratio; if(xmlNode->BoolAttributeValueByName("centerx", "true")) x = (width - w) / 2; if(xmlNode->BoolAttributeValueByName("centery", "true")) y = (height - h) / 2; if(locked_theta) { Gdiplus::Bitmap * bitmap = RotateImage(&image, locked_theta, w, h); float dx = x + w / 2 - bitmap->GetWidth() / 2; float dy = y + h / 2 - bitmap->GetHeight() / 2; FGraphics->DrawImage(bitmap, dx, dy, bitmap->GetWidth(), bitmap->GetHeight()); delete bitmap; } else FGraphics->DrawImage(&image, x, y, w, h); } } } void __fastcall TCbwGdiMeta::SetProperty(UnicodeString pname, UnicodeString value) { UnicodeString name = THelper::String::GetStringAt(pname, ".", 0); UnicodeString attr = THelper::String::GetStringAt(pname, ".", 1); CbwXmlNode * destNode = FXmlContent->NodeByAttribute("name", name); if(destNode) destNode->AddAttribute(attr, value); } void __fastcall TCbwGdiMeta::DoAddToXmlNode(CbwXmlNode * node) { inherited::DoAddToXmlNode(node); CbwXmlNode * thisNode = node->LastNode; thisNode->AddElement(FXmlContent->Clone()); } void __fastcall TCbwGdiMeta::DoGetFromXmlNode(CbwXmlNode * node, int& index) { inherited::DoGetFromXmlNode(node, index); CbwXmlNode * thisNode = node->LastNode; FXmlContent->Assign(thisNode); } UnicodeString __fastcall TCbwGdiMeta::GetContent() { UnicodeString result = FXmlContent->GetHint("\n"); return result; } void __fastcall TCbwGdiMeta::SetContent(UnicodeString value) { FXmlContent->ReadFromString(value); } void __fastcall TCbwGdiMeta::SetXmlContent(CbwXmlNode * node) { if(node != FXmlContent) { UnicodeString content = node->GetHint("\n"); SetContent(content); } Draw(); }
剩下的就是实时更新时钟，直接更新即可。
void __fastcall TCbwGraphForm_Player::UpdateTimeControls() { CBW_ITERATOR(CbwObjects, Objects) { TCbwGdiMeta * gdiMeta = dynamic_cast<TCbwGdiMeta *>(*it); if(gdiMeta && CanObjectBeVisible(gdiMeta)) { unsigned short Year, Month, Day, Hour, Minute, sec, msec; DecodeTime(Now(), Hour, Minute, sec, msec); double minute = Minute + sec / 60.0; double hour = (Hour + minute / 60.0) * 30; minute = minute * 6; sec *= 6; gdiMeta->SetProperty("Hour.angle", hour); gdiMeta->SetProperty("Minute.angle", minute); gdiMeta->SetProperty("Second.angle", sec); gdiMeta->Draw(); } } }
如此这般，在运行时就可以看到实时时钟效果
属性处理
为了更通用地处理，再实现一个兼容xml内容的属性浏览器，主要需要增加两个属性类型：
头文件：
class CbwXmlNodeAttributePropertyItem : public OrdinalPropertyItem { typedef OrdinalPropertyItem inherited; CbwXmlNode * FDestNode; virtual void __fastcall GetPropertyValue(); virtual void __fastcall SetValue(Variant var); public: __fastcall CbwXmlNodeAttributePropertyItem(TObject * object, UnicodeString propertyName, UnicodeString displayName = "", bool v = true); }; class CbwXmlNodePropertyItem : public ObjectPropertyItem { typedef ObjectPropertyItem inherited; CbwXmlNode * FDestNode; virtual void __fastcall AddItems(TList * item); virtual void __fastcall GetPropertyValue(); virtual void __fastcall SetStringList(TStringList * list); public: __fastcall CbwXmlNodePropertyItem(TObject * object, UnicodeString propertyName, UnicodeString displayName = "", bool v = true); };
源代码：
__fastcall CbwXmlNodeAttributePropertyItem::CbwXmlNodeAttributePropertyItem (TObject * object, UnicodeString propertyName, UnicodeString displayName, bool v) : OrdinalPropertyItem(object, propertyName, displayName, v) { } void __fastcall CbwXmlNodeAttributePropertyItem::GetPropertyValue() { FDestNode = dynamic_cast<CbwXmlNode *>(Object); if(FDestNode) PropertyValue = FDestNode->AttributeValueByName(PropertyName); } void __fastcall CbwXmlNodeAttributePropertyItem::SetValue(Variant var) { if(FDestNode) { FDestNode->AddAttribute(PropertyName, var); CbwXmlNodePropertyItem * parent = dynamic_cast<CbwXmlNodePropertyItem *>(ParentItem); CbwXmlNode * node = FDestNode;//->ParentNode; while(parent && node) { if(IsPublishedProp(parent->Object, parent->PropertyName)) { SetObjectProp(parent->Object, parent->PropertyName, node); break; } parent = dynamic_cast<CbwXmlNodePropertyItem *>(parent->ParentItem); node = node->ParentNode; } } } void __fastcall CbwXmlNodePropertyItem::SetStringList(TStringList * list) { } void __fastcall CbwXmlNodePropertyItem::GetPropertyValue() { PropertyValue = PropertyName; } void __fastcall CbwXmlNodePropertyItem::AddItems(TList * item) { int count = item->Count; for (int i = 0; i < count; i++) { CbwPropertyItem * cItem = (CbwPropertyItem*)(item->Items[i]); delete cItem; } delete item; } __fastcall CbwXmlNodePropertyItem::CbwXmlNodePropertyItem (TObject * object, UnicodeString propertyName, UnicodeString displayName, bool v) : ObjectPropertyItem(object, propertyName, displayName, v) { FreeAllItem(); FDestNode = dynamic_cast<CbwXmlNode *>(object); if(!FDestNode) FDestNode = dynamic_cast<CbwXmlNode *>(GetObjectProp(object, propertyName)); if(FDestNode) { StringList->Clear(); int count = FDestNode->ElementNumber + FDestNode->Attributes.size(); if(count) { cItemList = new PPropertyItem[count]; int index = FDestNode->ElementNumber; CBW_ITERATOR_MAP(UnicodeString, UnicodeString, FDestNode->Attributes) cItemList[index++] = new CbwXmlNodeAttributePropertyItem(FDestNode, it->first); for(int i = 0; i < FDestNode->ElementNumber; ++i) { CbwXmlNode * node = FDestNode->Elements(i); UnicodeString name = node->Name; if(node->ContainAttribute("Name")) name = node->AttributeValueByName("Name"); cItemList[i] = new CbwXmlNodePropertyItem(node, name); } for(int i = 0; i < count; ++i) { StringList->Add("empty"); cItemList[i]->ParentItem = this; } } } PropertyValue = "XmlNode"; }
现在可以完全支持模拟时钟。对于数字时钟、日历、天气预报等，稍后再整理。
标签：通用 路径 ddt http ant graphics tca 设置 string
原文地址：http://www.cnblogs.com/drgraph/p/7630147.html
