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BeginCombo(): rework internals a little to make it easier to provide custom combo-like elements relying in BeginCombo().

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BeginPopupEx() doesn't enforce AlwaysAutoResize flag anymore.
This commit is contained in:
omar
2017-09-25 21:45:34 +02:00
parent a34edb810e
commit 0d56140b4a
3 changed files with 22 additions and 14 deletions
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31
imgui.cpp
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@@ -3569,7 +3569,7 @@ bool ImGui::BeginPopupEx(ImGuiID id, ImGuiWindowFlags extra_flags)
}
PushStyleVar(ImGuiStyleVar_WindowRounding, 0.0f);
ImGuiWindowFlags flags = extra_flags|ImGuiWindowFlags_Popup|ImGuiWindowFlags_NoTitleBar|ImGuiWindowFlags_NoResize|ImGuiWindowFlags_NoSavedSettings|ImGuiWindowFlags_AlwaysAutoResize;
ImGuiWindowFlags flags = extra_flags|ImGuiWindowFlags_Popup|ImGuiWindowFlags_NoTitleBar|ImGuiWindowFlags_NoResize|ImGuiWindowFlags_NoSavedSettings;
char name[20];
if (flags & ImGuiWindowFlags_ChildMenu)
@@ -3594,7 +3594,7 @@ bool ImGui::BeginPopup(const char* str_id)
ClearSetNextWindowData(); // We behave like Begin() and need to consume those values
return false;
}
return BeginPopupEx(g.CurrentWindow->GetID(str_id), ImGuiWindowFlags_ShowBorders);
return BeginPopupEx(g.CurrentWindow->GetID(str_id), ImGuiWindowFlags_ShowBorders | ImGuiWindowFlags_AlwaysAutoResize);
}
bool ImGui::IsPopupOpen(ImGuiID id)
@@ -8602,7 +8602,7 @@ bool ImGui::Combo(const char* label, int* current_item, const char* items_separa
return value_changed;
}
bool ImGui::BeginCombo(const char* label, const char* preview_value, float popup_opened_height)
bool ImGui::BeginCombo(const char* label, const char* preview_value, ImVec2 popup_size)
{
ImGuiWindow* window = GetCurrentWindow();
if (window->SkipItems)
@@ -8662,17 +8662,24 @@ bool ImGui::BeginCombo(const char* label, const char* preview_value, float popup
if (!popup_open)
return false;
if (popup_size.x == 0.0f)
popup_size.x = w;
float popup_y1 = frame_bb.Max.y;
float popup_y2 = ImClamp(popup_y1 + popup_opened_height, popup_y1, g.IO.DisplaySize.y - style.DisplaySafeAreaPadding.y);
if ((popup_y2 - popup_y1) < ImMin(popup_opened_height, frame_bb.Min.y - style.DisplaySafeAreaPadding.y))
float popup_y2 = ImClamp(popup_y1 + popup_size.y, popup_y1, g.IO.DisplaySize.y - style.DisplaySafeAreaPadding.y);
if ((popup_y2 - popup_y1) < ImMin(popup_size.y, frame_bb.Min.y - style.DisplaySafeAreaPadding.y))
{
// Position our combo ABOVE because there's more space to fit! (FIXME: Handle in Begin() or use a shared helper. We have similar code in Begin() for popup placement)
popup_y1 = ImClamp(frame_bb.Min.y - popup_opened_height, style.DisplaySafeAreaPadding.y, frame_bb.Min.y);
popup_y1 = ImClamp(frame_bb.Min.y - popup_size.y, style.DisplaySafeAreaPadding.y, frame_bb.Min.y);
popup_y2 = frame_bb.Min.y;
SetNextWindowPos(ImVec2(frame_bb.Min.x, frame_bb.Min.y), ImGuiCond_Always, ImVec2(0.0f, 1.0f));
}
ImRect popup_rect(ImVec2(frame_bb.Min.x, popup_y1), ImVec2(frame_bb.Max.x, popup_y2));
SetNextWindowPos(popup_rect.Min);
SetNextWindowSize(popup_rect.GetSize());
else
{
// Position our combo below
SetNextWindowPos(ImVec2(frame_bb.Min.x, frame_bb.Max.y), ImGuiCond_Always, ImVec2(0.0f, 0.0f));
}
SetNextWindowSize(ImVec2(popup_size.x, popup_y2 - popup_y1), ImGuiCond_Appearing);
PushStyleVar(ImGuiStyleVar_WindowPadding, style.FramePadding);
const ImGuiWindowFlags flags = ImGuiWindowFlags_ComboBox | ((window->Flags & ImGuiWindowFlags_ShowBorders) ? ImGuiWindowFlags_ShowBorders : 0);
@@ -8705,9 +8712,9 @@ bool ImGui::Combo(const char* label, int* current_item, bool (*items_getter)(voi
// Size default to hold ~7 items
if (height_in_items < 0)
height_in_items = 7;
float popup_opened_height = (g.FontSize + style.ItemSpacing.y) * ImMin(items_count, height_in_items) + (style.FramePadding.y * 3);
float popup_height = (g.FontSize + style.ItemSpacing.y) * ImMin(items_count, height_in_items) + (style.FramePadding.y * 3);
if (!BeginCombo(label, preview_text, popup_opened_height))
if (!BeginCombo(label, preview_text, ImVec2(0.0f, popup_height)))
return false;
// Display items
@@ -9119,7 +9126,7 @@ bool ImGui::BeginMenu(const char* label, bool enabled)
if (menu_is_open)
{
SetNextWindowPos(popup_pos, ImGuiCond_Always);
ImGuiWindowFlags flags = ImGuiWindowFlags_ShowBorders | ((window->Flags & (ImGuiWindowFlags_Popup|ImGuiWindowFlags_ChildMenu)) ? ImGuiWindowFlags_ChildMenu|ImGuiWindowFlags_ChildWindow : ImGuiWindowFlags_ChildMenu);
ImGuiWindowFlags flags = ImGuiWindowFlags_ShowBorders | ImGuiWindowFlags_AlwaysAutoResize | ((window->Flags & (ImGuiWindowFlags_Popup|ImGuiWindowFlags_ChildMenu)) ? ImGuiWindowFlags_ChildMenu|ImGuiWindowFlags_ChildWindow : ImGuiWindowFlags_ChildMenu);
menu_is_open = BeginPopupEx(id, flags); // menu_is_open can be 'false' when the popup is completely clipped (e.g. zero size display)
}