add copy/paste support to the frequency selector

core/src/gui/widgets/frequency_select.cpp

@@ -3,6 +3,7 @@
 #include <gui/style.h>
 #include <gui/gui.h>
 #include <backend.h>
+#include <utils/hrfreq.h>
 
 #ifndef IMGUI_DEFINE_MATH_OPERATORS
 #define IMGUI_DEFINE_MATH_OPERATORS
@@ -90,6 +91,7 @@ void FrequencySelect::moveCursorToDigit(int i) {
 
 void FrequencySelect::draw() {
     auto window = ImGui::GetCurrentWindow();
+    auto io = ImGui::GetIO();
     widgetPos = ImGui::GetWindowContentRegionMin();
     ImVec2 cursorPos = ImGui::GetCursorPos();
     widgetPos.x += window->Pos.x + cursorPos.x;
@@ -132,7 +134,7 @@ void FrequencySelect::draw() {
         ImVec2 mousePos = ImGui::GetMousePos();
         bool leftClick = ImGui::IsMouseClicked(ImGuiMouseButton_Left);
         bool rightClick = ImGui::IsMouseClicked(ImGuiMouseButton_Right);
-        int mw = ImGui::GetIO().MouseWheel;
+        int mw = io.MouseWheel;
         bool onDigit = false;
         bool hovered = false;
 
@@ -174,7 +176,7 @@ void FrequencySelect::draw() {
                     moveCursorToDigit(i + 1);
                 }
 
-                auto chars = ImGui::GetIO().InputQueueCharacters;
+                auto chars = io.InputQueueCharacters;
 
                 // For each keyboard characters, type it
                 for (int j = 0; j < chars.Size; j++) {
@@ -194,6 +196,34 @@ void FrequencySelect::draw() {
             }
         }
         digitHovered = hovered;
+
+        if (isInArea(mousePos, digitTopMins[0], digitBottomMaxs[11])) {
+            bool shortcutKey = io.ConfigMacOSXBehaviors ? (io.KeyMods == ImGuiKeyModFlags_Super) : (io.KeyMods == ImGuiKeyModFlags_Ctrl);
+            bool ctrlOnly = (io.KeyMods == ImGuiKeyModFlags_Ctrl);
+            bool shiftOnly = (io.KeyMods == ImGuiKeyModFlags_Shift);
+            bool copy  = ((shortcutKey && ImGui::IsKeyPressed(ImGuiKey_C)) || (ctrlOnly  && ImGui::IsKeyPressed(ImGuiKey_Insert)));
+            bool paste = ((shortcutKey && ImGui::IsKeyPressed(ImGuiKey_V)) || (shiftOnly && ImGui::IsKeyPressed(ImGuiKey_Insert)));
+            if (copy) {
+                // Convert the freqency to a string
+                std::string freqStr = hrfreq::toString(frequency);
+
+                // Write it to the clipboard
+                ImGui::SetClipboardText(freqStr.c_str());
+            }
+            if (paste) {
+                // Attempt to parse the clipboard as a number
+                const char* clip = ImGui::GetClipboardText();
+
+                // If the clipboard is not empty, attempt to parse it
+                if (clip) {
+                    double newFreq;
+                    if (hrfreq::fromString(clip, newFreq)) {
+                        setFrequency(abs(newFreq));
+                        frequencyChanged = true;
+                    }
+                }
+            }
+        }
     }
 
     uint64_t freq = 0;

core/src/utils/hrfreq.cpp

@@ -0,0 +1,113 @@
+#include "hrfreq.h"
+#include <utils/flog.h>
+
+namespace hrfreq {
+
+
+    std::string toString(double freq) {
+        // Determine the scale
+        int maxDecimals = 0;
+        const char* suffix = "Hz";
+        if (freq >= 1e9) {
+            freq /= 1e9;
+            maxDecimals = 9;
+            suffix = "GHz";
+        }
+        else if (freq >= 1e6) {
+            freq /= 1e6;
+            maxDecimals = 6;
+            suffix = "MHz";
+        }
+        else if (freq >= 1e3) {
+            freq /= 1e3;
+            maxDecimals = 3;
+            suffix = "KHz";
+        }
+
+        // Convert to string (TODO: Not sure if limiting the decimals rounds)
+        char numBuf[128];
+        int numLen = sprintf(numBuf, "%0.*lf", maxDecimals, freq);
+
+        // Remove the useless zeros
+        for (int i = numLen-1; i >= 0; i--) {
+            if (numBuf[i] != '0' && numBuf[i] != '.') { break; }
+            numBuf[i] = 0;
+        }
+
+        // Concat the suffix
+        char finalBuf[128];
+        sprintf(finalBuf, "%s%s", numBuf, suffix);
+
+        // Return the final string
+        return finalBuf;
+    }
+
+    bool isNumeric(char c) {
+        return std::isdigit(c) || c == '+' || c == '-' || c == '.' || c == ',';
+    }
+
+    bool fromString(const std::string& str, double& freq) {
+        // Skip non-numeric characters
+        int i = 0;
+        char c;
+        for (; i < str.size(); i++) {
+            if (isNumeric(str[i])) { break; }
+        }
+
+        // Extract the numeric part
+        std::string numeric;
+        for (; i < str.size(); i++) {
+            // Get the character
+            c = str[i];
+
+            // If it's a letter, stop
+            if (std::isalpha(c)) { break; }
+
+            // If isn't numeric, skip it
+            if (!isNumeric(c)) { continue; }
+
+            // Add the character to the numeric string
+            numeric += c;
+        }
+
+        // Attempt to parse the numeric part
+        double num;
+        try {
+            num = std::stod(numeric);
+        }
+        catch (const std::exception& e) {
+            flog::error("Failed to parse numeric part: '{}'", numeric);
+            return false;
+        }
+
+        // If no more text is available, assume the numeric part gives a frequency in Hz
+        if (i == str.size()) {
+            flog::warn("No unit given, assuming it's Hz");
+            freq = num;
+            return true;
+        }
+
+        // Scale the numeric value depending on the first scale character
+        char scale = std::toupper(str[i]);
+        switch (scale) {
+        case 'G':
+            num *= 1e9;
+            break;
+        case 'M':
+            num *= 1e6;
+            break;
+        case 'K':
+            num *= 1e3;
+            break;
+        case 'H':
+            break;
+        default:
+            flog::warn("Unknown frequency scale: '{}'", scale);
+            break;
+        }
+
+        // Return the frequency
+        freq = num;
+        return true; // TODO
+    }
+}

core/src/utils/hrfreq.h

@@ -0,0 +1,19 @@
+#pragma once
+#include <string>
+
+namespace hrfreq {
+    /**
+     * Convert a frequency to a human-readable string.
+     * @param freq Frequency in Hz.
+     * @return Human-readable representation of the frequency.
+    */
+    std::string toString(double freq);
+
+    /**
+     * Convert a human-readable representation of a frequency to a frequency value.
+     * @param str String containing the human-readable frequency.
+     * @param freq Value to write the decoded frequency to.
+     * @return True on success, false otherwise.
+    */
+    bool fromString(const std::string& str, double& freq);
+}