From 11110f23c907f34ac6d86eee47462c8b73c1ca98 Mon Sep 17 00:00:00 2001
From: Ammerhai <mikebalzer@outlook.com>
Date: Wed, 19 Nov 2025 13:50:21 +0100
Subject: [PATCH] add hovering + selected

change year selection frontend structure

#3
---
 src/work-calendar.cpp | 68 ++++++++++++++++++++++++++++++++++---------
 1 file changed, 55 insertions(+), 13 deletions(-)

diff --git a/src/work-calendar.cpp b/src/work-calendar.cpp
index f58dc31..a588e23 100644
--- a/src/work-calendar.cpp
+++ b/src/work-calendar.cpp
@@ -71,12 +71,22 @@ typedef struct Categorized_Day {
     int category;
 } Categorized_Day;
 
+static int year_min_size = 1;
 static size_t num_categorized_days = 0;
 static Categorized_Day categorized_days[365*50];
 
+//Colors
+ImVec4 table_white_bg = ImVec4(1.0f, 1.0f, 1.0f, 1.0f);
+ImVec4 table_saturday_bg = ImVec4(0.0f, 0.0f, 0.0f, 0.1f);
+ImVec4 table_sunday_bg = ImVec4(0.0f, 0.0f, 0.0f, 0.2f);
+
+ImVec4 table_hover_color = ImVec4(0.0f, 0.3f, 0.6f, 0.2f);
+
 void per_frame(){
     ImGuiStyle &style = ImGui::GetStyle();
 
+    year_min_size = ImGui::CalcTextSize("8888").x + 5;
+
     ImGuiID main_viewport_dock = ImGui::GetID("main_viewport_dock");
     if (!ImGui::DockBuilderGetNode(main_viewport_dock)) {
         ImGui::DockBuilderAddNode    (main_viewport_dock, ImGuiDockNodeFlags_DockSpace | ImGuiDockNodeFlags_NoTabBar);
@@ -109,17 +119,30 @@ void per_frame(){
         ImGui::PushStyleColor(ImGuiCol_HeaderHovered, {0,0,0,0});
         ImGui::PushStyleColor(ImGuiCol_HeaderActive, {0,0,0,0});
 
-        ImGui::BeginGroup();
-        if (ImGui::ArrowButton("##left", ImGuiDir_Left)) 
-            year--;
-        ImGui::SameLine(0, 0);
+        if(ImGui::BeginTable("CalendarHeader", 5)) {
+            
+            ImGui::TableSetupColumn("", ImGuiTableColumnFlags_WidthStretch);    // Left side
+            ImGui::TableSetupColumn("", ImGuiTableColumnFlags_WidthFixed);      // Prev year
+            ImGui::TableSetupColumn("", ImGuiTableColumnFlags_WidthFixed, year_min_size);      // Year
+            ImGui::TableSetupColumn("", ImGuiTableColumnFlags_WidthFixed);      // Next year
+            ImGui::TableSetupColumn("", ImGuiTableColumnFlags_WidthStretch);    // Right side
+            
+            ImGui::TableNextRow();
 
-        if (ImGui::ArrowButton("##right", ImGuiDir_Right))  
-            year++; 
-        ImGui::SameLine(0, 0);
+            ImGui::TableSetColumnIndex(0);
+            ImGui::TableSetColumnIndex(1);
+            if (ImGui::ArrowButton("##left", ImGuiDir_Left)) 
+                year--;
+            ImGui::TableSetColumnIndex(2);
+            ImGui::TextAligned(0.5, -FLT_MIN, "%d", year);  
+
+            ImGui::TableSetColumnIndex(3);
+            if (ImGui::ArrowButton("##right", ImGuiDir_Right))  
+                year++; 
         
-        ImGui::TextAligned(0.5, -FLT_MIN, "%d", year);  
-        ImGui::EndGroup();
+            ImGui::TableSetColumnIndex(4);
+            ImGui::EndTable();
+        }
 
         for (int month = 1; month <= 12; month++) {
             ImGui::PushID(month);
@@ -194,32 +217,51 @@ void per_frame(){
                         }
 
                         ImGui::TableSetColumnIndex(weekday);
-                        ImU32 cell_bg_color_workweek = ImGui::GetColorU32(ImVec4(1.0f, 1.0f, 1.0f, 1.0f));
+                        ImU32 cell_bg_color_workweek = ImGui::GetColorU32(table_white_bg);
                         ImGui::TableSetBgColor(ImGuiTableBgTarget_CellBg, cell_bg_color_workweek);
 
                         //weekend coloring
                         if(weekday == 5){
-                            ImU32 cell_bg_color_sat = ImGui::GetColorU32(ImVec4(0.0f, 0.0f, 0.0f, 0.1f));
+                            ImU32 cell_bg_color_sat = ImGui::GetColorU32(table_saturday_bg);
                             ImGui::TableSetBgColor(ImGuiTableBgTarget_CellBg, cell_bg_color_sat);
                         }
 
                         if(weekday == 6){
-                            ImU32 cell_bg_color_sun = ImGui::GetColorU32(ImVec4(0.0f, 0.0f, 0.0f, 0.2f));
+                            ImU32 cell_bg_color_sun = ImGui::GetColorU32(table_sunday_bg);
                             ImGui::TableSetBgColor(ImGuiTableBgTarget_CellBg, cell_bg_color_sun);
                         }
 
+                        //color field with category 
                         for (int i = 0; i < num_categorized_days; i++) {
                             if (categorized_days[i].year  != year)  continue;
                             if (categorized_days[i].month != month) continue;
                             if (categorized_days[i].day   != day)   continue;
-                                
+                            
                             ImColor color = categories[categorized_days[i].category].color;
                             color.Value.w = 0.5;
+
+                            //sat + sun: add alpha value
+                            if(weekday == 5)
+                                color.Value.w = color.Value.w  + table_saturday_bg.w;
+                            if(weekday == 6)
+                                color.Value.w = color.Value.w  + table_sunday_bg.w;
+
                             ImGui::TableSetBgColor(ImGuiTableBgTarget_CellBg, ImU32(color));
                         }
                         
                         ImGui::TextAligned(0.5, -FLT_MIN, "%d", day);
 
+                        if(ImGui::IsItemHovered()){
+                            if(selected_category != -1) {
+                                ImColor hover_color = categories[selected_category].color;
+                                hover_color.Value.w = 0.2;
+                                ImGui::TableSetBgColor(ImGuiTableBgTarget_CellBg, ImGui::GetColorU32(ImU32(hover_color)));
+                            } else {
+                                ImGui::TableSetBgColor(ImGuiTableBgTarget_CellBg, ImGui::GetColorU32(table_hover_color));
+                            }
+                        }
+
+                        //apply selected color to field
                         if (selected_category != -1 && ImGui::IsItemClicked()) {
                             for (int i = 0; i < num_categorized_days; i++) {
                                 if (categorized_days[i].year  != year)  continue;