OpenEuphoria

2. Re: wxEuphoria - On hover

• Posted by buzzo Jan 11, 2015
• 2150 views

You might try MouseTraps ... Defined sub-regions of a window that can generate w32HMouseTrap events.

4. Re: wxEuphoria - On hover

• Posted by Steady Jan 14, 2015
• 2094 views

Thanks Greg and Buzzo.

I suspected that w32HMouseTrap was only in Win32Lib because there is no documentation for it in wxEuphoria.

I will work on Greg's suggestion. It seems a horrendous task. I suppose I will have to convert all my 15 comboboxes to reside within a grid of 1x15, and then define all the parameters which the mouse might visit to open the comboboxes, and before clicking the combobox should open if I simulate "open combo box" event. That last part might be difficult. I have about 15 comboboxes with 6-17 items in each, at present occupying very little real estate. At one point I did have these 120 or so items displayed nicely in a grid of 15 rows, 20 columns, but that was rejected because it occupied too much real estate.

6. Re: wxEuphoria - On hover

• Posted by ghaberek (admin) Jan 14, 2015
• 2061 views

I did some cursory testing with wxWidgets 3.0.2 on Windows 7 and it's not looking good for the functionality you've described.

Basically what happens, is that when you call Popup() during the wxEVT_ENTER_WINDOW event, it shows the dropdown as you'd expect. But, the act of calling Popup() also triggers wxEVT_LEAVE_WINDOW because the popup itself is technically a separate window, which immediately closes the dropdown with the call to Dismiss(). This creates an annoying loop with the dropdown opening and closing very rapidly.

If skip calling Dismiss() during the wxEVT_LEAVE_WINDOW event, I get the expected behavior and the dropdown does not close. However, moving the cursor over another combobox does not trigger another wxEVT_ENTER_WINDOW event because the dropdown still has focus.

The ultimate solution may involve tracking the cursor using wxEVT_MOTION on the parent window, using HitTest() to see which combobox is under the cursor, and then showing the dropdown with Popup() if the "current" combobox has changed. Currently, the hit_test() function in wxEuphoria only works on wxListCtrl, wxTreeCtrl, or wxTextCtrl, even though wxWindow supports HitTest() as well.

Yet another thing that would have to be wrapped for this to work. Again, I will see if I can get to that soon.

Here is the code I used to test, if it is of any use to you.

#include <wx/combobox.h> 
 
class AutoComboBox : public wxComboBox 
{ 
public: 
    AutoComboBox( wxWindow* parent, 
        wxWindowID id, 
        const wxString& value = wxEmptyString, 
        const wxPoint& pos = wxDefaultPosition, 
        const wxSize& size = wxDefaultSize, 
        long style = 0 ); 
     
    void OnEnter( wxMouseEvent& event ); 
    void OnLeave( wxMouseEvent& event ); 
     
private: 
    wxDECLARE_EVENT_TABLE(); 
}; 
 
wxBEGIN_EVENT_TABLE(AutoComboBox, wxComboBox) 
    EVT_ENTER_WINDOW(AutoComboBox::OnEnter) 
    EVT_LEAVE_WINDOW(AutoComboBox::OnLeave) 
wxEND_EVENT_TABLE() 
 
AutoComboBox::AutoComboBox( wxWindow* parent, wxWindowID id, const wxString& value, const wxPoint& pos, const wxSize& size, long style ) 
    : wxComboBox( parent, id, value, pos, size, 0, NULL, style, wxDefaultValidator, wxComboBoxNameStr ) 
{ 
    wxArrayString items; 
    items.Add( "Apples" ); 
    items.Add( "Bananas" ); 
    items.Add( "Grapes" ); 
    items.Add( "Oranges" ); 
    items.Add( "Pears" ); 
     
    this->Append( items ); 
} 
 
void AutoComboBox::OnEnter( wxMouseEvent& event ) 
{ 
    this->Popup(); 
} 
 
void AutoComboBox::OnLeave( wxMouseEvent& event ) 
{ 
    this->Dismiss(); 
} 

-Greg

8. Re: wxEuphoria - On hover

• Posted by ghaberek (admin) Jan 15, 2015
• 2071 views

That seems to me like a behavior exhibited by a series of menus, not comboboxes. I assume you have a hierarchy of values that depend on the level above them, like Car Make/Model/Year, etc.

I think we may be able to accomplish this by "chaining" one combobox into the next. During the wxEVT_COMMAND_COMBOBOX_SELECTED event (i.e. when a combobox value changes), we can jump to the "next" combobox and show its dropdown immediately. This does still require that we implement Popup() in wxEuphoria. But at least with the code below, you get that automatic "jump" when something is selected.

 
include wxeu/wxeud.e 
include std/map.e 
 
constant NULL = 0 
constant wxID_ANY = -1 
 
constant 
    ID_COMBO1 = new_id(), 
    ID_COMBO2 = new_id(), 
    ID_COMBO3 = new_id(), 
$ 
 
atom frame = create( wxFrame, {NULL, wxID_ANY, "ComboBox", -1, -1, 400, 300} ) 
atom panel = create( wxPanel, {frame} ) 
atom combo1 = create( wxComboBox, {panel, ID_COMBO1, "", 10, 10, 200, -1} ) 
atom combo2 = create( wxComboBox, {panel, ID_COMBO2, "", 10, 40, 200, -1} ) 
atom combo3 = create( wxComboBox, {panel, ID_COMBO3, "", 10, 70, 200, -1} ) 
 
map m_next = map:new() 
map:put( m_next, combo1, combo2 ) 
map:put( m_next, combo2, combo3 ) 
 
sequence items = { "Apples", "Bananas", "Grapes", "Oranges", "Pears" } 
 
for i = 1 to length( items ) do 
    add_item( combo1, items[i] ) 
    add_item( combo2, items[i] ) 
    add_item( combo3, items[i] ) 
end for 
 
procedure ComboBox_onChange( atom this, atom event_type, atom id, atom event ) 
     
    atom next = map:get( m_next, this, NULL ) 
     
    if next != NULL then 
         
        set_focus( next ) 
--      popup( next ) -- not implemented 
         
    end if 
     
end procedure 
set_event_handler( combo1, -1, wxEVT_COMMAND_COMBOBOX_SELECTED, routine_id("ComboBox_onChange") ) 
set_event_handler( combo2, -1, wxEVT_COMMAND_COMBOBOX_SELECTED, routine_id("ComboBox_onChange") ) 
set_event_handler( combo3, -1, wxEVT_COMMAND_COMBOBOX_SELECTED, routine_id("ComboBox_onChange") ) 
 
wxMain( frame ) 

-Greg

10. Re: wxEuphoria - On hover

• Posted by ghaberek (admin) Jan 16, 2015
• 2020 views

To create a submenu, first create a wxMenu object with no parent, then create a new wxMenuItem with the menu as the subMenu parameter.

Here is an example showing:

• how to create a popup menu
• how to create sub-menus
• how to show a popup menu when a button is clicked

Edit: here's a better demo that builds the menus with loops and tracks their values using a map.

include wxeu/wxeud.e 
include std/map.e 
 
constant NULL = 0 
constant wxID_ANY = -1 
 
atom frame    = create( wxFrame, {NULL, wxID_ANY, "Popup Menu Demo", -1, -1, 400, 300} ) 
atom panel    = create( wxPanel, {frame, wxID_ANY} ) 
atom button   = create( wxButton, {panel, wxID_ANY, "Select", 30, 30, 90, 30} ) 
atom popup    = create( wxMenu, {NULL} ) 
 
map m_text = map:new() 
 
atom menu, item, subitem, id 
sequence text 
 
for i = 1 to 6 do 
     
    text = sprintf( "Menu %d", {i} ) 
    menu = create( wxMenu, {NULL} ) 
    item = create( wxMenuItem, {popup, wxID_ANY, text, "", wxITEM_NORMAL, menu} ) 
     
    for j = 1 to 8 do 
         
        id = new_id() 
        text = sprintf( "Item %d-%d", {i,j} ) 
         
        subitem = create( wxMenuItem, {menu, id, text} ) 
        map:put( m_text, id, text ) 
         
    end for 
     
end for 
 
procedure button_clicked( atom this, atom event_type, atom id, atom event ) 
     
    sequence rect = get_rect( button ) 
    show_popup_menu( panel, popup, rect[1], rect[2]+rect[4] ) 
     
end procedure 
set_event_handler( button, wxID_ANY, wxEVT_COMMAND_BUTTON_CLICKED, routine_id("button_clicked") ) 
 
procedure menuitem_clicked( atom this, atom event_type, atom id, atom event ) 
     
    sequence text = map:get( m_text, id, "unknown" ) 
    message_box( sprintf("You clicked on '%s' (id = %d)", {text,id}), "Popup Menu Demo", wxICON_INFORMATION ) 
     
end procedure 
set_event_handler( popup, wxID_ANY, wxEVT_COMMAND_MENU_SELECTED, routine_id("menuitem_clicked") ) 
 
wxMain( frame ) 

There is a wxTreeCtrl and wxListCtrl demo included with wxEuphoria, called tree_list_demo.exw.

-Greg

12. Re: wxEuphoria - On hover

• Posted by Steady Jan 20, 2015
• 1901 views

Just to let you know that I am working with wxMenu, etc with some success.
I made to three levels and will me going to the fourth level - and it is all on Hover and seamless.
Thanks again, Greg.