用c#繪制Office2003樣式的菜單

2024-07-21 02:18:29

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我的方法是重寫menuitem類,在寫的過程中發現用gdi+實際測量出來的文本的大小不是很準確,還有文本也不能很好對齊,固在代碼里可以時?？吹胶芏喽嗉由先サ臄底?我想原理就不用我講了吧，下面的代碼注釋的很
清楚了:
using system;
using system.drawing;
using system.drawing.drawing2d;
using system.windows.forms;
namespace officemenu
{
/// <summary>
/// class1 的摘要說明。
/// </summary>
public class officemenuitem:menuitem
{
public officemenuitem(bool isapplyofficemenu,string itemtext)
{
if(isapplyofficemenu)
{
this.text=itemtext;
this.ownerdraw=true;
font=new font("宋體",9f,graphicsunit.point);
}
else
{
this.text=itemtext;
this.ownerdraw=false;
}
}

private font font;
private stringformat strformat=new stringformat();
private string itemtext="";
private string iconpath="";

//定義繪制的時候的各種筆刷
private lineargradientbrush topmenuhostlightbrush;
private solidbrush topmenudefaultbrush;
private solidbrush fontdefaultbrush;
private lineargradientbrush topmenuselectedbrush;
private solidbrush menudefaultbrush;
private solidbrush menudefaultselectedbrush;
private solidbrush menucheckbrush;
private lineargradientbrush menusidebarbrush;
private solidbrush menudefaultgrayedbrush;
//定義繪制的時候所需的各種線條
private pen topmenupen;
private pen menudefaultpen;
//定義需要的矩形結構
private rectangle sidebarrect;
private rectangle checkedrect;
private rectangle topmenurect;
private rectangle shortcutrect;

//定義圖標
public string iconpath
{
get
{
return iconpath;
}
set
{
iconpath=value;
}
}

//判斷菜單是否是頂級菜單
private bool checkistop()
{
if(typeof(mainmenu)==this.parent.gettype())
{
return true;
}
else
{
return false;
}
}
//獲取菜單的快捷鍵
private string getshortcut()
{
string shortcut="";
try
{
if(this.showshortcut==true && (!this.isparent) && (!(this.shortcut==shortcut.none)))
{
shortcut=this.shortcut.tostring();
shortcut=shortcut.replace("ctrl","ctrl+");
shortcut=shortcut.replace("alt","alt+");
shortcut=shortcut.replace("shift","shift+");
}
}
catch
{
return "";
}
return shortcut;
}
//重寫測量函數
protected override void onmeasureitem(measureitemeventargs e)
{
base.onmeasureitem (e);

try
{
itemtext=this.text;
sizef sizemenutext;
if(this.itemtext=="-") //設置分割線的高度
{
e.itemheight=5;
return;
}

string getedshortcut=this.getshortcut();
if(!this.checkistop()) //如果不是頂級菜單
{
sizemenutext=e.graphics.measurestring(itemtext+"".padright(4,' ')+getedshortcut,this.font);
e.itemwidth=convert.toint32(sizemenutext.width)+26;
}
else
{
sizemenutext=e.graphics.measurestring(itemtext,this.font);
e.itemwidth=convert.toint32(sizemenutext.width)-4;
}
if(this.visible)
{
e.itemheight=convert.toint32(sizemenutext.height)+6;
}
else
{
e.itemheight=0;
}

}
catch
{
e.itemheight=20;
e.itemwidth=80;
}
}
//重寫繪圖函數
protected override void ondrawitem(drawitemeventargs e)
{
if(this.visible)
{
base.ondrawitem (e);
rectangle menurect=e.bounds;
itemtext=this.text;
graphics g=e.graphics;

//繪制邊框時需要的特殊矩形
sidebarrect=new rectangle(menurect.x,menurect.y,25,menurect.height);
//繪制選擇框時需要的矩形
checkedrect=new rectangle(menurect.x+1,menurect.y+1,24,menurect.height-2);
//繪制頂菜單時需要的矩形
topmenurect=new rectangle(menurect.x+1,menurect.y+3,menurect.width,menurect.height);
//繪制shortcut用到的矩形
shortcutrect=new rectangle(menurect.x,menurect.y+4,menurect.width-10,menurect.height);

//定義繪制的時候的各種筆刷
topmenuhostlightbrush=new lineargradientbrush(menurect,color.white,color.fromargb(220,134,56),90f); //頂級菜單發生hotlight 時顯示的顏色
topmenudefaultbrush=new solidbrush(systemcolors.control); //頂級菜單默認的顏色
fontdefaultbrush=new solidbrush(color.black); //字體默認的顏色
topmenuselectedbrush=new lineargradientbrush(menurect,color.white,color.fromargb(95,109,126),90f); //頂級菜單選中時的顏色
menudefaultbrush=new solidbrush(color.white); //默認菜單的顏色
menudefaultselectedbrush=new solidbrush(color.fromargb(247,218,157)); //菜單選中時的顏色
menucheckbrush=new solidbrush(color.fromargb(225,143,70)); //當菜單checked屬性為真的時顯示的顏色
menusidebarbrush=new lineargradientbrush(sidebarrect,color.white,color.fromargb(149,160,174),0f);//繪制側欄
menudefaultgrayedbrush=new solidbrush(color.fromargb(105,105,105));//菜單不可用時
//定義繪制的時候所需的各種線條
topmenupen=new pen(brushes.black,1f); //頂級菜單的邊框
menudefaultpen=new pen(new solidbrush(color.fromargb(60,60,115)),1f); //正常選擇時的邊框

//開始繪制****************************************************
if(this.checkistop() && this.itemtext!="-") //如果是頂級菜單
{
bool isdraw=false;//定義一個變量保證正常顯示的只繪制一次避免浪費資源
strformat.alignment=stringalignment.center;
if(isdraw==false) //繪制正常顯示時的圖像
{
g.fillrectangle(topmenudefaultbrush,menurect);
g.drawstring(itemtext,this.font,fontdefaultbrush,topmenurect,strformat);
}

//繪制hotlight時的圖像
if((e.state & drawitemstate.hotlight)==drawitemstate.hotlight) //突出顯示時
{
g.fillrectangle(topmenuhostlightbrush,menurect);
g.drawrectangle(topmenupen,menurect.x,menurect.y,menurect.width-1,menurect.height-1);
g.drawstring(itemtext,this.font,fontdefaultbrush,topmenurect,strformat);
isdraw=true;
}
//繪制菜單選中時的圖像
if((e.state & drawitemstate.selected)==drawitemstate.selected)
{
g.fillrectangle(topmenuselectedbrush,menurect);
g.drawrectangle(topmenupen,menurect.x,menurect.y,menurect.width-1,menurect.height-1);
g.drawstring(itemtext,this.font,fontdefaultbrush,topmenurect,strformat);
isdraw=true;
}
}
else //非頂級菜單時
{
if(this.itemtext!="-")
{
bool isdraw=false;
if(isdraw==false) //正常顯示時
{
g.fillrectangle(menudefaultbrush,menurect);
g.fillrectangle(menusidebarbrush,menurect.x,menurect.y,25,menurect.height);
g.drawstring(itemtext,this.font,fontdefaultbrush,menurect.x+26,menurect.y+4);
//繪制shortcut
string shortcut=this.getshortcut();
strformat.alignment=stringalignment.far;
g.drawstring(shortcut,this.font,fontdefaultbrush,shortcutrect,strformat);
//繪制圖標
this.drawicon(g);
}

if((e.state & drawitemstate.selected)==drawitemstate.selected) //選中時
{
this.drawitem_selected(g,menurect,itemtext);
isdraw=true;
}

if((e.state & drawitemstate.grayed)==drawitemstate.grayed) //不可用時
{
g.drawstring(itemtext,this.font,menudefaultgrayedbrush,menurect.x+26,menurect.y+4);
isdraw=true;
}

if(!this.isparent)
{
if((e.state & drawitemstate.checked)==drawitemstate.checked) //選擇時
{
g.fillrectangle(menucheckbrush,checkedrect);
g.drawrectangle(new pen(brushes.black,1f),menurect.x+1,menurect.y+1,23,menurect.height-3);
g.drawstring("√",this.font,fontdefaultbrush,menurect.x+3,menurect.y+4);
isdraw=true;
}

if(this.checked==true && ((e.state & drawitemstate.selected)==drawitemstate.selected)) //選中且checked屬性為真時
{
g.fillrectangle(new solidbrush(color.fromargb(255,91,91)),checkedrect);
g.drawrectangle(new pen(brushes.black,1f),menurect.x+1,menurect.y+1,23,menurect.height-3);
g.drawstring("√",this.font,fontdefaultbrush,menurect.x+3,menurect.y+4);
isdraw=true;
}
}
}
else //畫分割線
{
solidbrush partitionlinebrush=new solidbrush(color.fromargb(128,128,128));
pen partitionpen=new pen(partitionlinebrush,1f);
g.fillrectangle(menudefaultbrush,menurect);
g.fillrectangle(menusidebarbrush,menurect.x,menurect.y,25,menurect.height);
g.drawline(partitionpen,new point(menurect.x+27,menurect.y+2),new point(menurect.x+27+(menurect.width-26),menurect.y+2));
}

}
}
}

//畫圖標
private void drawicon(graphics g)
{
if(this.checkistop()==false && this.iconpath!="" && this.isparent==false && this.checked==false)
{
try
{
bitmap iconimage=new bitmap(this.iconpath);
int imagewidth=iconimage.width;
int imageheight=iconimage.height;
if(imagewidth<=checkedrect.width && imageheight<=checkedrect.height)
{
int imagerecwidthmistake=checkedrect.width-imagewidth;
float mistake_2=(float)imagerecwidthmistake/2f;
g.drawimage(iconimage,checkedrect.x+(int)mistake_2,checkedrect.y,imagewidth,imageheight);
}
else
{
g.drawimage(iconimage,checkedrect);
}
}
catch
{
throw new iconnotfindexception("不能創建圖標,可能是路徑不能也可能是不支持此格式");
}
}
}
//由于再繪制的過程中選中的動作時需要執行兩次一樣的代碼固在這里用了一個函數
private void drawitem_selected(graphics g,rectangle rec,string itemtext)
{
solidbrush tmpbrush;
if(this.enabled)
{
tmpbrush=fontdefaultbrush;
}
else
{
tmpbrush=menudefaultgrayedbrush;
}

//正常顯示
g.fillrectangle(menudefaultselectedbrush,rec);
g.drawrectangle(menudefaultpen,rec.x,rec.y,rec.width-1,rec.height-1);
g.drawstring(itemtext,this.font,tmpbrush,rec.x+26,rec.y+4);

//顯示shortcut
string shortcut=this.getshortcut();
strformat.alignment=stringalignment.far;
g.drawstring(shortcut,this.font,tmpbrush,shortcutrect,strformat);
//畫圖標
this.drawicon(g);
}
}

//自定義異常
public class iconnotfindexception:applicationexception
{
public iconnotfindexception(string message)
:base(message)
{
}
}
}

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