From 614b1581a662952d5d282427e6fd353b007d610f Mon Sep 17 00:00:00 2001
From: enricoturri1966 <enricoturri@seznam.cz>
Date: Mon, 10 Oct 2022 09:46:12 +0200
Subject: [PATCH] Measuring - Gizmo measure - Auto-select text when opening
 imgui modal dialog to edit distance

---
 src/slic3r/GUI/Gizmos/GLGizmoMeasure.cpp | 10 ++++++++++
 src/slic3r/GUI/Gizmos/GLGizmoMeasure.hpp |  1 +
 2 files changed, 11 insertions(+)

diff --git a/src/slic3r/GUI/Gizmos/GLGizmoMeasure.cpp b/src/slic3r/GUI/Gizmos/GLGizmoMeasure.cpp
index 79a800bf2..b4c35b156 100644
--- a/src/slic3r/GUI/Gizmos/GLGizmoMeasure.cpp
+++ b/src/slic3r/GUI/Gizmos/GLGizmoMeasure.cpp
@@ -221,6 +221,7 @@ void GLGizmoMeasure::data_changed()
     m_selected_features.reset();
     m_selection_raycasters.clear();
     m_editing_distance = false;
+    m_is_editing_distance_first_frame = true;
 }
 
 bool GLGizmoMeasure::gizmo_event(SLAGizmoEventType action, const Vec2d& mouse_position, bool shift_down, bool alt_down, bool control_down)
@@ -258,6 +259,7 @@ void GLGizmoMeasure::on_set_state()
         m_curr_point_on_feature_position.reset();
         restore_scene_raycasters_state();
         m_editing_distance = false;
+        m_is_editing_distance_first_frame = true;
     }
     else {
         m_mode = EMode::BasicSelection;
@@ -904,6 +906,7 @@ void GLGizmoMeasure::render_dimensioning()
             };
             auto action_exit = [this]() {
                 m_editing_distance = false;
+                m_is_editing_distance_first_frame = true;
                 ImGui::CloseCurrentPopup();
             };
             auto action_scale = [this, perform_scale, action_exit](double new_value, double old_value) {
@@ -916,6 +919,13 @@ void GLGizmoMeasure::render_dimensioning()
             if (ImGui::InputDouble("##distance", &edit_value, 0.0f, 0.0f, "%.3f")) {
             }
 
+            // trick to auto-select text in the input widgets on 1st frame
+            if (m_is_editing_distance_first_frame) {
+                ImGui::SetKeyboardFocusHere(0);
+                m_is_editing_distance_first_frame = false;
+                m_imgui->set_requires_extra_frame();
+            }
+
             // handle keys input
             if (ImGui::IsKeyPressedMap(ImGuiKey_Enter) || ImGui::IsKeyPressedMap(ImGuiKey_KeyPadEnter))
                 action_scale(edit_value, curr_value);
diff --git a/src/slic3r/GUI/Gizmos/GLGizmoMeasure.hpp b/src/slic3r/GUI/Gizmos/GLGizmoMeasure.hpp
index bba23fb6b..9db2a73aa 100644
--- a/src/slic3r/GUI/Gizmos/GLGizmoMeasure.hpp
+++ b/src/slic3r/GUI/Gizmos/GLGizmoMeasure.hpp
@@ -119,6 +119,7 @@ class GLGizmoMeasure : public GLGizmoBase
 
     SelectedFeatures m_selected_features;
     bool m_editing_distance{ false };
+    bool m_is_editing_distance_first_frame{ true };
 
     void update_if_needed();