使用C++调用GTK编写的计算器Demo

#include "map.h" #pragma comment( linker, "/subsystem:\"windows\" /entry:\"mainCRTStartup\"" ) //屏蔽cmd窗口 vector<string> Ivec; GtkWidget *gpWinMain=NULL; int main( int argc,char *argv[] ){ InitializeGTK(argc,argv); return 0; } //////////////////////////////////////////////////////////////////////////初始化GTK////////////////////////////////////////////////////////////////////////// int InitializeGTK(int argc,char *argv[] ) { gtk_init (&argc, &argv);//初始化 GtkBuilder *builder; GtkWidget *window; //定义一下widget GError *err=NULL; builder = gtk_builder_new (); //new widget if (gtk_builder_add_from_file (builder,".\\glade\\winCalculator.glade", &err) == 0) //从文件加载glade { g_error_free (err); return false; } window = GTK_WIDGET(gtk_builder_get_object(builder, "winCalculator")); //获取窗体 g_object_set_data(G_OBJECT(window),"winCalculator",window); g_signal_connect(G_OBJECT(window),"destroy", G_CALLBACK(destroy),NULL); g_signal_connect(G_OBJECT(window),"delete_event", G_CALLBACK(delete_event),NULL); GtkWidget *pwidget; pwidget=GTK_WIDGET(gtk_builder_get_object(builder,"txtInput"));//获取控件 g_object_set_data(G_OBJECT(window),"txtInput",pwidget); pwidget=GTK_WIDGET(gtk_builder_get_object(builder,"btn0"));//获取控件 ConnectButtonNumWidget(NULL,pwidget); pwidget=GTK_WIDGET(gtk_builder_get_object(builder,"btn1"));//获取控件 ConnectButtonNumWidget(NULL,pwidget); pwidget=GTK_WIDGET(gtk_builder_get_object(builder,"btn2"));//获取控件 ConnectButtonNumWidget(NULL,pwidget); pwidget=GTK_WIDGET(gtk_builder_get_object(builder,"btn3"));//获取控件 ConnectButtonNumWidget(NULL,pwidget); pwidget=GTK_WIDGET(gtk_builder_get_object(builder,"btn4"));//获取控件 ConnectButtonNumWidget(NULL,pwidget); pwidget=GTK_WIDGET(gtk_builder_get_object(builder,"btn5"));//获取控件 ConnectButtonNumWidget(NULL,pwidget); pwidget=GTK_WIDGET(gtk_builder_get_object(builder,"btn6"));//获取控件 ConnectButtonNumWidget(NULL,pwidget); pwidget=GTK_WIDGET(gtk_builder_get_object(builder,"btn7"));//获取控件 ConnectButtonNumWidget(NULL,pwidget); pwidget=GTK_WIDGET(gtk_builder_get_object(builder,"btn8"));//获取控件 ConnectButtonNumWidget(NULL,pwidget); pwidget=GTK_WIDGET(gtk_builder_get_object(builder,"btn9"));//获取控件 ConnectButtonNumWidget(NULL,pwidget); pwidget=GTK_WIDGET(gtk_builder_get_object(builder,"btnPoint"));//获取控件 ConnectButtonNumWidget(NULL,pwidget); pwidget=GTK_WIDGET(gtk_builder_get_object(builder,"btnResult"));//获取控件 g_signal_connect ((gpointer) pwidget, "clicked",G_CALLBACK (on_btnResult_clicked),NULL);//定义事件 pwidget=GTK_WIDGET(gtk_builder_get_object(builder,"btnAdd"));//获取控件 ConnectActionWidget(NULL,pwidget); pwidget=GTK_WIDGET(gtk_builder_get_object(builder,"btnSub"));//获取控件 ConnectActionWidget(NULL,pwidget); pwidget=GTK_WIDGET(gtk_builder_get_object(builder,"btnMul"));//获取控件 ConnectActionWidget(NULL,pwidget); pwidget=GTK_WIDGET(gtk_builder_get_object(builder,"btnDiv"));//获取控件 ConnectActionWidget(NULL,pwidget); pwidget=GTK_WIDGET(gtk_builder_get_object(builder,"btnClear"));//获取控件 g_signal_connect ((gpointer) pwidget, "clicked",G_CALLBACK (on_btnClear_Clicked),NULL);//定义事件 gpWinMain=window; InitializeApplication(); gtk_window_set_title(GTK_WINDOW(window),"计算器"); gtk_window_set_icon(GTK_WINDOW(window),create_pixbuf(".\\Pic\\psu.jpg")); gtk_widget_show (window); //show窗体 gtk_main (); //执行gtk main函数 return 0; } void ConnectButtonNumWidget(GtkBuilder *builder, GtkWidget *pwidget) { g_signal_connect ((gpointer) pwidget, "clicked",G_CALLBACK (on_btn_clicked),NULL);//定义事件 } void ConnectActionWidget(GtkBuilder *builder, GtkWidget *pwidget) { g_signal_connect ((gpointer) pwidget, "clicked",G_CALLBACK (on_btnAction_Clicked),NULL);//定义事件 } void destroy(GtkWidget *window,gpointer data) { gtk_main_quit();//程序退出 } gboolean delete_event(GtkWidget *window,GdkEvent *event,gpointer data) { return false; } void on_btn_clicked(GtkButton *button,gpointer data) { ShowInputNum(button,data); } void ShowInputNum(GtkButton *button,gpointer data) { const gchar *BtnText=gtk_button_get_label(button); GtkWidget *control; control=(GtkWidget*)g_object_get_data(G_OBJECT(gpWinMain),"txtInput"); const gchar *TxtText=gtk_entry_get_text(GTK_ENTRY(control)); string strBtnText(BtnText); string strTxt(TxtText); bool isHavePoint=false;//记录是否为Point size_t loc=strTxt.find(".",0); if( loc != string::npos ) { if (strBtnText==".") return; } if (Ivec.size()==1) { if (strTxt!="0"||strBtnText==".") { string temp=strTxt+strBtnText;//串连输入 Ivec[0]=temp; gtk_entry_set_text(GTK_ENTRY(control),temp.c_str()); } else if (strBtnText!=".") { Ivec[0]=strBtnText; gtk_entry_set_text(GTK_ENTRY(control),BtnText); } } else if (Ivec.size()>1) { if (Ivec.size()==2) { if (strBtnText!=".") { Ivec.push_back(BtnText); gtk_entry_set_text(GTK_ENTRY(control),BtnText); } else { string temp="0"+strBtnText;//串连输入 Ivec.push_back(temp); gtk_entry_set_text(GTK_ENTRY(control),temp.c_str()); } } else { string temp=strTxt+strBtnText;//串连输入 Ivec[2]=temp; gtk_entry_set_text(GTK_ENTRY(control),temp.c_str()); } } } void on_btnClear_Clicked(GtkButton *button,gpointer data) { InitializeApplication(); } void InitializeApplication() { Ivec.clear(); const gchar *temp="0";//还原 GtkWidget *control; control=(GtkWidget*)g_object_get_data(G_OBJECT(gpWinMain),"txtInput"); gtk_entry_set_text(GTK_ENTRY(control),temp); Ivec.push_back("0"); } void on_btnAction_Clicked(GtkButton *button,gpointer data) { ActionProcess(button,data); } void ActionProcess(GtkButton *button,gpointer data) { const gchar *BtnText=gtk_button_get_label(button); string strBtnText(BtnText); if (Ivec.size()==0) return; else if (Ivec.size()==1) Ivec.push_back(strBtnText); else if (Ivec.size()==2) Ivec[1]=strBtnText; else { ShowResult(); Ivec.push_back(strBtnText); } } void on_btnResult_clicked(GtkButton *button,gpointer data) { if (Ivec.size()!=3) return; ShowResult(); } void ShowResult() { GtkWidget *control; control=(GtkWidget*)g_object_get_data(G_OBJECT(gpWinMain),"txtInput"); double calResult=Calculate(); char str[50]; //%g //%e sprintf(str,"%g",calResult); Ivec.push_back(str); gtk_entry_set_text(GTK_ENTRY(control),str); } double Calculate() { double i=atof(Ivec[0].c_str()); string action=Ivec[1]; double j=atof(Ivec[2].c_str()); double calResult=0; if (action=="+") calResult =i+j; else if (action=="-") calResult= i-j; else if (action=="*") calResult= i*j; else if (action=="/") calResult= i/j; Ivec.clear(); return calResult; } GdkPixbuf *create_pixbuf(const gchar * filename){ GdkPixbuf *pixbuf; GError *error = NULL; pixbuf = gdk_pixbuf_new_from_file(filename, &error); if(!pixbuf) { fprintf(stderr, "%s\n", error->message); g_error_free(error); } return pixbuf; }