fl_输入为字符串

FL_Input into a string

本文关键字：字符串 输入 fl      更新时间：2023-10-16

你好，我是新来的FLTK，现在我有一个非常简单的程序，如果你运行程序，点击创建然后机器人部分，你会看到几个选项选择一个。一个新窗口将打开几个FL_Input框和一个输入按钮，我想做一个回调，以便当用户按下输入FL_Input框中输入的文本保存为字符串，例如有人在FL_Input中输入Space head，然后该值被分配给字符串。我主要不需要帮助回调只是设置一个字符串等于FL_Input。非常感谢您的帮助

#include <iostream>
#include <sstream>
#include <stdio.h>
#include <FL/Fl.H>
#include <FL/Fl_Text_Display.H>
#include <FL/fl_draw.H>
#include <FL/Fl_Double_Window.H>
#include <FL/Fl_Window.H>
#include <FL/filename.H>    
#include <FL/Fl_Box.H>
#include <FL/Fl_Slider.H>
#include <string>
#include <FL/Fl_Int_Input.H>
#include <list>
#include <FL/Fl_Color_Chooser.H>
#include <vector>
#include <FL/Fl_Button.H>
#include <FL/Fl_Check_Button.H>
#include <FL/Fl_Tabs.H>
#include <FL/Fl_Input.H>
#include <FL/Fl_Menu_Bar.H>
#include <FL/Fl_Output.H>
#include <cstdlib>
using namespace std;

void Change_CB(Fl_Widget *w, void *) {
    Fl_Menu_Bar *menu = (Fl_Menu_Bar*)w;
    Fl_Menu_Item *p;
    // Change submenu name
    p = (Fl_Menu_Item*)menu->find_item("Edit/Submenu");
    if (p) p->label("New Submenu Name");
    // Change item name
    p = (Fl_Menu_Item*)menu->find_item("Edit/New Submenu Name/Aaa");
    if (p) p->label("New Aaa Name");
}
void Quit_CB(Fl_Widget *, void *) {
    exit(0);
}
void head_window(Fl_Widget *, void *) {
    Fl_Window *head = new Fl_Window(300, 200, "Head");
    Fl_Input *input = new Fl_Input(110, 0, 100, 30, "Name");
    Fl_Input *input1 = new Fl_Input(110, 40, 100, 30, "Part-Number");
    Fl_Input *input2 = new Fl_Input(110, 80, 100, 30, "Weight");
    Fl_Input *input3 = new Fl_Input(110, 120, 100, 30, "Cost");
    Fl_Button *enter = new Fl_Button(110, 160, 100, 30, "Enter");
    head->show();
}
void torso_window(Fl_Widget *, void *) {
    Fl_Window *head = new Fl_Window(350, 250, "Torso");
    Fl_Input *input = new Fl_Input(150, 0, 100, 30, "Name");
    Fl_Input *input1 = new Fl_Input(150, 40, 100, 30, "Part-Number");
    Fl_Input *input2 = new Fl_Input(150, 80, 100, 30, "Weight");
    Fl_Input *input3 = new Fl_Input(150, 120, 100, 30, "Cost");
    Fl_Input *input4 = new Fl_Input(150, 160, 100, 30, "Battery Compartments");
    Fl_Button *enter = new Fl_Button(150, 200, 100, 30, "Enter");
    head->show();
}
void locomotor_window(Fl_Widget *, void *) {
    Fl_Window *head = new Fl_Window(350, 300, "Locomotor");
    Fl_Input *input = new Fl_Input(150, 0, 100, 30, "Name");
    Fl_Input *input1 = new Fl_Input(150, 40, 100, 30, "Part-Number");
    Fl_Input *input2 = new Fl_Input(150, 80, 100, 30, "Weight");
    Fl_Input *input3 = new Fl_Input(150, 120, 100, 30, "Cost");
    Fl_Input *input4 = new Fl_Input(150, 160, 100, 30, "Speed(MPH)");
    Fl_Input *input5 = new Fl_Input(150, 200, 100, 30, "Power Consumed(W)");
    Fl_Button *enter = new Fl_Button(150, 240, 100, 30, "Enter");
    head->show();
}
void arm_window(Fl_Widget *, void *) {
    Fl_Window *head = new Fl_Window(350, 250, "Arm");
    Fl_Input *input = new Fl_Input(150, 0, 100, 30, "Name");
    Fl_Input *input1 = new Fl_Input(150, 40, 100, 30, "Part-Number");
    Fl_Input *input2 = new Fl_Input(150, 80, 100, 30, "Weight");
    Fl_Input *input3 = new Fl_Input(150, 120, 100, 30, "Cost");
    Fl_Input *input4 = new Fl_Input(150, 160, 100, 30, "Power Consumed(W)");
    Fl_Button *enter = new Fl_Button(150, 200, 100, 30, "Enter");
    head->show();
}
void battery_window(Fl_Widget *, void *) {
    Fl_Window *head = new Fl_Window(350, 250, "Battery");
    Fl_Input *input = new Fl_Input(150, 0, 100, 30, "Name");
    Fl_Input *input1 = new Fl_Input(150, 40, 100, 30, "Part-Number");
    Fl_Input *input2 = new Fl_Input(150, 80, 100, 30, "Weight");
    Fl_Input *input3 = new Fl_Input(150, 120, 100, 30, "Cost");
    Fl_Input *input4 = new Fl_Input(150, 160, 100, 30, "Energy Stored");
    Fl_Button *enter = new Fl_Button(150, 200, 100, 30, "Enter");
    head->show();
}
void manual_window(Fl_Widget *, void *) {
    Fl_Window *win = new Fl_Window(400, 275);
    Fl_Text_Buffer *buff = new Fl_Text_Buffer();
    Fl_Text_Display *disp = new Fl_Text_Display(20, 20, 350 , 250 , "Manual");
    disp->buffer(buff);
    win->resizable(*disp);
    win->show();
    buff->text("You may click the file button to open a dropdownnmenu and you will get a button to exit the windownor press CTRL + vn"
        "You may click create and you get two options eithernto make a robot part or robot modeln"
        "Clicking on robot part that shows the parts you mayncreate and their associated shortcutsn"
        "If you have any questions click help then click onnmanual to open the manualn"
            );
        win->show();
}
int main() {
    Fl_Window *win = new Fl_Window(600, 300, "Robot Shop" );
    Fl_Menu_Bar *menu = new Fl_Menu_Bar(0, 0, 600, 25);
    menu->add("File/Quit", FL_CTRL + 'v', Quit_CB);
    menu->add("Create/Robot Part/Head" , FL_CTRL + 'h' , head_window );
    menu->add("Create/Robot Part/Torso" , FL_CTRL + 't' , torso_window);
    menu->add("Create/Robot Part/Arm" , FL_CTRL + 'a' , arm_window);
    menu->add("Create/Robot Part/Battery" , FL_CTRL + 'b' , battery_window);
    menu->add("Create/Robot Part/Locomotor" , FL_CTRL + 'l' , locomotor_window);
    menu->add("Create/Robot Model");
    menu->add("Help/Manual", FL_CTRL + 'm' , manual_window);
    win->show();
    return(Fl::run());
}

很抱歉，这是迟来的，但我认为下面的工作。

Fl_Input * inp1; //This is a global declaration 
Fl_Button * sav1;
static void sav1_cb(Fl_Button *theButton, void*) // The callback function
{
    string Surname = inp1 -> value();
cout << Surname;
}
inp1 = new Fl_Input (170+100, 50, 200, 20,"Surname"); // The input field which must be in a window
sav1 = new Fl_Button (170+310, 50 + 280, 100, 30,"Save"); // The save button
    sav1->callback((Fl_Callback*)sav1_cb); //Attaching the callback to the save button

需要注意的是，"value()"函数是我用来操作在输入字段中存储或写入的数据的。这只是一个样本。希望能有所帮助。

您需要将数据存储在某个地方。建议使用

enum EData
{
   EDHeadWeight,
   EDHeadCost,
   ...
   EDMax
};
std::string data[EDMax];

选项1:将Fl_Button (enter)更改为Fl_Return_Button，然后设置按钮的回调以保存所有值。这假定当用户按return时，他们已经输入了所有的值。

选项2:如果您想捕获每次输入时的enter，使用when(FL_WHEN_ENTER_KEY)

Fl_Input *input4 = new Fl_Input(150, 160, 100, 30, "Battery Compartments");
input4->when(FL_WHEN_ENTER_KEY);
input4->callback(grab, &data[EDTorsoBattery]);
...
void grab(Fl_Widget* w, void* param)
{
   std::string& rv = *((std::string*)param);
   Fl_Input* inp = dynamic_cast<Fl_Input*>(w);
   rv = inp->value();
}

这里的问题是，它要求您将inp->value()存储到const char*中，但常量不能修改…

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