詳解Matlab如何繪制圓角半透明圖例

第詳解Matlab如何繪制圓角半透明圖例目錄基本使用使用說明完整代碼目前MATLAB的legend圖例是不支持圓角和半透明的，欸，不能咱就自己畫，就是把原始圖例隱藏后不斷追蹤其位置繪制半透明的圓角矩形嘛，這有任何難度嗎？？？完全沒有??！因此就有了這篇推送(目前不支持三維繪圖)：

基本使用

繼續(xù)假設(shè)我們編寫了如下代碼：

t=0:0.35:3*pi;

plot(t,sin(t),'Marker','d','LineWidth',2,'Color',[102,194,166]./255)

holdon

plot(t,cos(t./2),'Marker','o','LineWidth',2,'Color',[252,140,97]./255)

plot(t,t,'Marker','^','LineWidth',2,'Color',[140,161,204]./255)

lgd=legend('y=sin(t)','y=cos(t/2)','y=t');

lgd.Location='northwest';

lgd.FontSize=13;

title(lgd,'Func','FontSize',14)

繪圖結(jié)果如下：

在代碼最后加上一行：

prettyLegend()

不過這樣只體現(xiàn)了圓角的性質(zhì)，并沒有體現(xiàn)其半透明，要體現(xiàn)其半透明的性質(zhì)坐標(biāo)區(qū)域最好不是白色的，哎我們直接和上一篇一結(jié)合不就好了(Matlab繪制酷炫坐標(biāo)區(qū)域的方法詳解)

例如最后加上兩行(注意請將圖例修飾加在坐標(biāo)區(qū)域修飾后面)：

prettyAxes().dark2()

prettyLegend()

prettyAxes().dark()

prettyLegend()

使用說明

當(dāng)拖拽圖例到其他位置，圖例框會跟隨：

當(dāng)調(diào)整圖窗大小導(dǎo)致圖例框大小異常時，在圖例附近晃動鼠標(biāo)即可修復(fù)大?。?/p>

完整代碼

functionlegendBox=prettyLegend(ax)

ifnargin1

ax=gca;

holdon

legendTitleColor=[0,0,0];

ifmean(ax.Color)0.5

legendTitleColor=[1,1,1];

ax.Legend.TextColor=[1,1,1];

ax.Legend.AutoUpdate='on';

%ax.Legend.FontSize=11;

%ax.Legend.Title.FontSize=14;

ax.Legend.AutoUpdate='off';

%如果在圖窗外則不設(shè)框

if~isempty(regexpi(ax.Legend.Location,'out','once'))

ax.Legend.Box='off';

lgdPos=ax.Legend.Position;

%依據(jù)legend所處figure坐標(biāo)和axes范圍計(jì)算Legend坐標(biāo)

xyMin=[(lgdPos(1)-ax.Position(1))/ax.Position(3)*(ax.XLim(2)-ax.XLim(1))+ax.XLim(1),...

(lgdPos(2)-ax.Position(2))/ax.Position(4)*(ax.YLim(2)-ax.YLim(1))+ax.YLim(1)];

xyMax=[(lgdPos(1)+lgdPos(3)-ax.Position(1))/ax.Position(3)*(ax.XLim(2)-ax.XLim(1))+ax.XLim(1),...

(lgdPos(2)+lgdPos(4)-ax.Position(2))/ax.Position(4)*(ax.YLim(2)-ax.YLim(1))+ax.YLim(1)];

ax.Legend.UserData.NewBkg=[];

%隱藏原標(biāo)題

ax.Legend.Title.Visible='off';

%繪制新legend標(biāo)題

ax.Legend.UserData.NewTitle=text(ax,xyMin(1),xyMax(2),['',ax.Legend.Title.String],...

'FontSize',ax.Legend.Title.FontSize,'VerticalAlignment','top','FontWeight','bold','Color',legendTitleColor);

ax.Legend.Box='off';

lgdPos=ax.Legend.Position;

%依據(jù)legend所處figure坐標(biāo)和axes范圍計(jì)算Legend坐標(biāo)

xyMin=[(lgdPos(1)-ax.Position(1))/ax.Position(3)*(ax.XLim(2)-ax.XLim(1))+ax.XLim(1),...

(lgdPos(2)-ax.Position(2))/ax.Position(4)*(ax.YLim(2)-ax.YLim(1))+ax.YLim(1)];

xyMax=[(lgdPos(1)+lgdPos(3)-ax.Position(1))/ax.Position(3)*(ax.XLim(2)-ax.XLim(1))+ax.XLim(1),...

(lgdPos(2)+lgdPos(4)-ax.Position(2))/ax.Position(4)*(ax.YLim(2)-ax.YLim(1))+ax.YLim(1)];

xDiff=(xyMax(1)-xyMin(1));

yDiff=(xyMax(2)-xyMin(2));

%繪制圓角矩形作為新框

ax.Legend.UserData.NewBkg=rectangle(ax,'Position',[xyMin,xDiff,yDiff],'Curvature',0.2,...

'LineWidth',1.2,'EdgeColor',[0.390.410.39],'FaceColor',[111.2]);

%ax.Legend.Title.FontSize=14;

%隱藏原標(biāo)題

ax.Legend.Title.Visible='off';

%繪制新legend標(biāo)題

ax.Legend.UserData.NewTitle=text(ax,xyMin(1),xyMax(2),['',ax.Legend.Title.String],...

'FontSize',ax.Legend.Title.FontSize,'VerticalAlignment','top','FontWeight','bold','Color',legendTitleColor);

%返回值

legendBox.Title=ax.Legend.UserData.NewTitle;

legendBox.Box=ax.Legend.UserData.NewBkg;

oriFunc=ax.Parent.WindowButtonMotionFcn;

set(ax.Parent,'WindowButtonMotionFcn',@bt_move);%設(shè)置鼠標(biāo)移動回調(diào)

functionbt_move(~,~)

oriFunc();

if~isempty(regexpi(ax.Legend.Location,'out','once'))

lgdPos=ax.Legend.Position;

%依據(jù)legend所處figure坐標(biāo)和axes范圍計(jì)算Legend坐標(biāo)

xyMin=[(lgdPos(1)-ax.Position(1))/ax.Position(3)*(ax.XLim(2)-ax.XLim(1))+ax.XLim(1),...

(lgdPos(2)-ax.Position(2))/ax.Position(4)*(ax.YLim(2)-ax.YLim(1))+ax.YLim(1)];

xyMax=[(lgdPos(1)+lgdPos(3)-ax.Position(1))/ax.Position(3)*(ax.XLim(2)-ax.XLim(1))+ax.XLim(1),...

(lgdPos(2)+lgdPos(4)-ax.Position(2))/ax.Position(4)*(ax.YLim(2)-ax.YLim(1))+ax.YLim(1)];

xyMin(1)=max(xyMin(1),ax.XLim(1));

xyMin(2)=max(xyMin(2),ax.YLim(1));

xyMax(1)=min(xyMax(1),ax.XLim(2));

xyMax(2)=min(xyMax(2),ax.YLim(2));

%重設(shè)位置屬性

ax.Legend.UserData.NewTitle.Position=[xyMin(1),xyMax(2)];

else

lgdPos=ax.Legend.Position;

%依據(jù)legend所處figure坐標(biāo)和axes范圍計(jì)算Legend坐標(biāo)

xyMin=[(lgdPos(1)-ax.Position(1))/ax.Position(3)*(ax.XLim(2)-ax.XLim(1))+ax.XLim(1),...

(lgdPos(2)-ax.Position(2))/ax.Position(4)*(ax.YLim(2)-ax.YLim(1))+ax.YLim(1)];

xyMax=[(lgdPos(1)+lgdPos(3)-ax.Position(1))/ax.Position(3)*(ax.XLim(2)-ax.XLim(1))+ax.XLim(1),...

(lgdPos(2)+lgdPos(4)-ax.Position(2))/ax.Position(4)*(ax.YLim(2)-ax.YLim(1))+ax.YLim(1)];

xyMin(1)=max(xyMin(1),ax.XLim(1));

xyMin(2)=max(xyMin(2),ax.YLim(1));

xyMax(1)=min(xyMax(1),ax.XLim(2))