expand ppbr export dialog

src/node_dialog_export_ppbr.cpp

@@ -1,6 +1,8 @@
 #include "pch.h"
 #include "log.h"
 #include "node_dialog_export_ppbr.h"
+#include "app.h"
+#include "image.h"
 
 Node* NodeDialogExportPPBR::clone_instantiate() const
 {
@@ -26,10 +28,42 @@ void NodeDialogExportPPBR::init()
 void NodeDialogExportPPBR::init_controls()
 {
     btn_ok = find<NodeButton>("btn-ok");
+    btn_ok->on_click = [this] (Node*) {
+        start_exporting();
+    };
     btn_cancel = find<NodeButton>("btn-cancel");
     btn_cancel->on_click = [this](Node*) {
         destroy();
     };
+    btn_header_open = find<NodeButton>("header-open");
+    btn_header_open->on_click = [this] (Node*) {
+        open_header();
+    };
+    btn_header_clear = find<NodeButton>("header-clear");
+    btn_header_clear->on_click = [this] (Node*) {
+        m_header_image.destroy();
+        img_header->tex.destroy();
+    };
+    btn_header_gen = find<NodeButton>("header-gen");
+    btn_header_gen->on_click = [this] (Node*) {
+        App::I->message_box("WIP", "This feature is not yet implemented.");
+    };
+    img_header = find<NodeImageTexture>("header-tex");
+
+}
+
+void NodeDialogExportPPBR::open_header()
+{
+    App::I->pick_image([this](std::string path) {
+        m_header_image.load(path);
+        m_header_image.resize(256, 128);
+        img_header->tex.create(m_header_image);
+    });
+}
+
+void NodeDialogExportPPBR::start_exporting()
+{
+    
 }
 
 void NodeDialogExportPPBR::added(Node* parent)