{"id":4130,"date":"2022-01-15T11:52:09","date_gmt":"2022-01-15T11:52:09","guid":{"rendered":"http:\/\/truelogic.org\/wordpress\/?p=4130"},"modified":"2022-01-15T11:54:26","modified_gmt":"2022-01-15T11:54:26","slug":"10a-wxwidgets-wxtextdrop","status":"publish","type":"post","link":"https:\/\/truelogic.org\/wordpress\/2022\/01\/15\/10a-wxwidgets-wxtextdrop\/","title":{"rendered":"10a. wxWidgets – wxTextDrop"},"content":{"rendered":"\n

OVERVIEW<\/strong><\/p>\n\n\n\n

<\/p>\n\n\n\n

In the sample code below, we setup two wxListCtrl widgets. One of them is filled with string items. The other is empty. We can drag items from the first one to the other to populate the second list. In this case we are using wxTextDropTarget<\/em><\/p>\n\n\n\n

SAMPLE CODE<\/strong><\/p>\n\n\n\n

dragdrop.h<\/pre>\n\n\n
\n#include <wx\/wxprec.h>\n#ifndef WX_PRECOMP\n   #include <wx\/wx.h>\n#endif\n#include <wx\/dnd.h>\t\n#include <wx\/listctrl.h>\n\nclass DragDrop: public wxFrame {\n\n\tpublic:\n\t\tDragDrop(const wxString& title);\n\t\tvoid onDragInit(wxListEvent& event); \n\tprivate:\n\t\twxListCtrl *mList1, *mList2;\t\n};\n\nclass DropTarget:public wxTextDropTarget {\n\n\tpublic:\n\t\tDropTarget(wxListCtrl *owner);\n\t\tvirtual bool OnDropText(wxCoord x, wxCoord y, const wxString& data);\n\n\tprivate:\n\t  wxListCtrl *mOwner;\t\n};\n\n<\/pre><\/div>\n\n\n
dragdrop.cpp<\/pre>\n\n\n
\n#include "dragdrop.h"\n\nDragDrop::DragDrop(const wxString& title):\n\twxFrame(NULL, -1, title, wxDefaultPosition, wxSize(500,200)) {\n\t\n\twxPanel *panel = new wxPanel(this,-1);\t\n\twxBoxSizer *hbox = new wxBoxSizer(wxHORIZONTAL);\n\tpanel->SetSizer(hbox);\n\n\t\n\tmList1 = new wxListCtrl(panel, -1, wxDefaultPosition, wxDefaultSize, wxLC_LIST | wxLC_SINGLE_SEL);\n\tmList2 = new wxListCtrl(panel, -1, wxDefaultPosition, wxDefaultSize, wxLC_LIST);\n\n\thbox->Add(mList1, 1, wxALL | wxEXPAND, 10);\n\thbox->Add(mList2, 1, wxALL | wxEXPAND,10);\n\n\tDropTarget *drop = new DropTarget(mList2);\n\tmList2->SetDropTarget(drop);\n\n\twxString value = wxT("");\n\tfor(int i=1; i <= 50; i++) {\n\t  value = "Item ";\n\t  value.Append(wxString::Format(wxT("%d"),i));\n\t  mList1->InsertItem(i, value);\n\t}\n\n\tConnect(mList1->GetId(), wxEVT_LIST_BEGIN_DRAG, \n\t\t\twxListEventHandler(DragDrop::onDragInit));\n\tCenter();\n}\n\nvoid DragDrop::onDragInit(wxListEvent& event) {\n\tlong sel = mList1->GetNextItem(-1, wxLIST_NEXT_ALL, wxLIST_STATE_SELECTED);\n\tif (sel > -1) {\n\t\twxString text = mList1->GetItemText(sel,0);\n\t\twxTextDataObject tdo(text);\n\t\twxDropSource tds(tdo, mList1);\n\t\ttds.DoDragDrop(wxDrag_CopyOnly);\n\t}\n}\n\nDropTarget::DropTarget(wxListCtrl *owner) {\n  mOwner = owner;\n}\n\nbool DropTarget::OnDropText(wxCoord x, wxCoord y, const wxString& data) {\n\tint count = mOwner->GetItemCount();\n\tmOwner->InsertItem(count, data);\n\treturn true;\n}\n\n\n\n<\/pre><\/div>\n\n\n
main.h<\/pre>\n\n\n
\n#include <wx\/wxprec.h>\n#ifndef WX_PRECOMP\n\t#include <wx\/wx.h>\n#endif\n\nclass Main: public wxApp {\n\n\tpublic:\n\t\tvirtual bool OnInit();\n};\n<\/pre><\/div>\n\n\n
main.cpp<\/pre>\n\n\n
\n#include "main.h"\n#include "dragdrop.h"\n\nIMPLEMENT_APP(Main)\n\nbool Main::OnInit() {\n\tDragDrop *app = new DragDrop(wxT("Drag And Drop"));\n\tapp->Show(true);\n\n}\n\n<\/pre><\/div>\n\n\n
The output is shown below<\/p>\n\n\n\n
\"\"<\/figure>\n\n\n\n
\"\"<\/figure>\n","protected":false},"excerpt":{"rendered":"
OVERVIEW In the sample code below, we setup two wxListCtrl widgets. One of them is filled with string items. The other is empty. We can […]<\/a><\/p>\n<\/div>","protected":false},"author":1,"featured_media":3595,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[302,365],"tags":[],"class_list":["post-4130","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-cc","category-wxwidgets"],"_links":{"self":[{"href":"https:\/\/truelogic.org\/wordpress\/wp-json\/wp\/v2\/posts\/4130","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/truelogic.org\/wordpress\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/truelogic.org\/wordpress\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/truelogic.org\/wordpress\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/truelogic.org\/wordpress\/wp-json\/wp\/v2\/comments?post=4130"}],"version-history":[{"count":4,"href":"https:\/\/truelogic.org\/wordpress\/wp-json\/wp\/v2\/posts\/4130\/revisions"}],"predecessor-version":[{"id":4141,"href":"https:\/\/truelogic.org\/wordpress\/wp-json\/wp\/v2\/posts\/4130\/revisions\/4141"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/truelogic.org\/wordpress\/wp-json\/wp\/v2\/media\/3595"}],"wp:attachment":[{"href":"https:\/\/truelogic.org\/wordpress\/wp-json\/wp\/v2\/media?parent=4130"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/truelogic.org\/wordpress\/wp-json\/wp\/v2\/categories?post=4130"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/truelogic.org\/wordpress\/wp-json\/wp\/v2\/tags?post=4130"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}