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Added a delete function that lets you delete numbers entered.

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This commit is contained in:
Zed A. Shaw 2025-05-07 00:55:16 -04:00
parent 576de347b9
commit 560f506733
1 changed files with 9 additions and 4 deletions
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13
demos/calc.cpp
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@ -14,7 +14,7 @@ using std::string, std::wstring;
enum class Event { enum class Event {
NUMBER, ADD, SUB, MUL, NUMBER, ADD, SUB, MUL,
DIV, CLR, NEG, EQ, PUSH, DUP DIV, CLR, NEG, EQ, PUSH, DUP, DEL
}; };
const std::unordered_map<string, wstring> LABELS { const std::unordered_map<string, wstring> LABELS {
@ -25,7 +25,7 @@ const std::unordered_map<string, wstring> LABELS {
{"btn8", L"8"}, {"btn9", L"9"}, {"mul", L"*"}, {"btn8", L"8"}, {"btn9", L"9"}, {"mul", L"*"},
{"sub", L"-"}, {"add", L"+"}, {"neg", L"±"}, {"sub", L"-"}, {"add", L"+"}, {"neg", L"±"},
{"div", L"/"}, {"eq", L"="}, {"div", L"/"}, {"eq", L"="},
{"push", L"^"}, {"pop", L"v"} }; {"push", L"^"}, {"pop", L"v"}, {"del", L"DEL"}};
const std::unordered_map<wchar_t, Event> EVENTS { const std::unordered_map<wchar_t, Event> EVENTS {
{L'0', Event::NUMBER}, {L'1', Event::NUMBER}, {L'0', Event::NUMBER}, {L'1', Event::NUMBER},
@ -37,7 +37,7 @@ const std::unordered_map<wchar_t, Event> EVENTS {
{L'+', Event::ADD}, {L'/', Event::DIV}, {L'+', Event::ADD}, {L'/', Event::DIV},
{L'C', Event::CLR}, {L'^', Event::PUSH}, {L'C', Event::CLR}, {L'^', Event::PUSH},
{L'±', Event::NEG}, {L'v', Event::DUP}, {L'±', Event::NEG}, {L'v', Event::DUP},
{L'=', Event::EQ} }; {L'=', Event::EQ}, {L'D', Event::DEL}};
struct Calculator { struct Calculator {
@ -93,6 +93,11 @@ struct Calculator {
case ADD: do_op(ADD); break; case ADD: do_op(ADD); break;
case SUB: do_op(SUB); break; case SUB: do_op(SUB); break;
case DIV: do_op(DIV); break; case DIV: do_op(DIV); break;
case DEL:
if(input.size() > 0) {
input.pop_back();
}
break;
case CLR: case CLR:
input = L""; input = L"";
stack.clear(); stack.clear();
@ -142,7 +147,7 @@ struct CalculatorUI {
"[btn7|btn8|btn9]" "[btn7|btn8|btn9]"
"[btn4|btn5|btn6]" "[btn4|btn5|btn6]"
"[btn1|btn2|btn3]" "[btn1|btn2|btn3]"
"[neg |btn0|_ ]"); "[neg |btn0|del]");
} }
void init() { void init() {