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Added SetNextWindowSizeConstraint() + demo code (#668)

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ocornut
2016-05-21 22:53:08 +02:00
parent 753bf5cefe
commit b7ebeb1610
4 changed files with 103 additions and 8 deletions
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48
imgui.cpp
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@ -457,7 +457,6 @@
The list below consist mostly of notes of things to do before they are requested/discussed by users (at that point it usually happens on the github)
- doc: add a proper documentation+regression testing system (#435)
- window: maximum window size settings (per-axis). for large popups in particular user may not want the popup to fill all space.
- window: add a way for very transient windows (non-saved, temporary overlay over hundreds of objects) to "clean" up from the global window list. perhaps a lightweight explicit cleanup pass.
- window: calling SetNextWindowSize() every frame with <= 0 doesn't do anything, may be useful to allow (particularly when used for a single axis).
- window: auto-fit feedback loop when user relies on any dynamic layout (window width multiplier, column) appears weird to end-user. clarify.
@ -3416,7 +3415,7 @@ static inline void ClearSetNextWindowData()
{
ImGuiContext& g = *GImGui;
g.SetNextWindowPosCond = g.SetNextWindowSizeCond = g.SetNextWindowContentSizeCond = g.SetNextWindowCollapsedCond = 0;
g.SetNextWindowFocus = false;
g.SetNextWindowSizeConstraint = g.SetNextWindowFocus = false;
}
static bool BeginPopupEx(const char* str_id, ImGuiWindowFlags extra_flags)
@ -3731,6 +3730,31 @@ static ImGuiWindow* CreateNewWindow(const char* name, ImVec2 size, ImGuiWindowFl
return window;
}
static void ApplySizeFullWithConstraint(ImGuiWindow* window, ImVec2 new_size)
{
ImGuiContext& g = *GImGui;
if (g.SetNextWindowSizeConstraint)
{
// Using -1,-1 on either X/Y axis to preserve the current size.
ImRect cr = g.SetNextWindowSizeConstraintRect;
new_size.x = (cr.Min.x >= 0 && cr.Max.x >= 0) ? ImClamp(new_size.x, cr.Min.x, cr.Max.x) : window->SizeFull.x;
new_size.y = (cr.Min.y >= 0 && cr.Max.y >= 0) ? ImClamp(new_size.y, cr.Min.y, cr.Max.y) : window->SizeFull.y;
if (g.SetNextWindowSizeConstraintCallback)
{
ImGuiSizeConstraintCallbackData data;
data.UserData = g.SetNextWindowSizeConstraintCallbackUserData;
data.Pos = window->Pos;
data.CurrentSize = window->SizeFull;
data.DesiredSize = new_size;
g.SetNextWindowSizeConstraintCallback(&data);
new_size = data.DesiredSize;
}
}
if (!(window->Flags & (ImGuiWindowFlags_ChildWindow | ImGuiWindowFlags_AlwaysAutoResize)))
new_size = ImMax(new_size, g.Style.WindowMinSize);
window->SizeFull = new_size;
}
// Push a new ImGui window to add widgets to.
// - A default window called "Debug" is automatically stacked at the beginning of every frame so you can use widgets without explicitly calling a Begin/End pair.
// - Begin/End can be called multiple times during the frame with the same window name to append content.
@ -3972,9 +3996,8 @@ bool ImGui::Begin(const char* name, bool* p_open, const ImVec2& size_on_first_us
}
}
// Apply window size constraints and final size
if (!(flags & (ImGuiWindowFlags_ChildWindow | ImGuiWindowFlags_AlwaysAutoResize)))
window->SizeFull = ImMax(window->SizeFull, style.WindowMinSize);
// Apply minimum/maximum window size constraints and final size
ApplySizeFullWithConstraint(window, window->SizeFull);
window->Size = window->Collapsed ? window->TitleBarRect().GetSize() : window->SizeFull;
// POSITION
@ -4096,7 +4119,7 @@ bool ImGui::Begin(const char* name, bool* p_open, const ImVec2& size_on_first_us
if (g.HoveredWindow == window && held && g.IO.MouseDoubleClicked[0])
{
// Manual auto-fit when double-clicking
window->SizeFull = size_auto_fit;
ApplySizeFullWithConstraint(window, size_auto_fit);
if (!(flags & ImGuiWindowFlags_NoSavedSettings))
MarkSettingsDirty();
SetActiveID(0);
@ -4104,7 +4127,7 @@ bool ImGui::Begin(const char* name, bool* p_open, const ImVec2& size_on_first_us
else if (held)
{
// We don't use an incremental MouseDelta but rather compute an absolute target size based on mouse position
window->SizeFull = ImMax((g.IO.MousePos - g.ActiveIdClickOffset + resize_rect.GetSize()) - window->Pos, style.WindowMinSize);
ApplySizeFullWithConstraint(window, (g.IO.MousePos - g.ActiveIdClickOffset + resize_rect.GetSize()) - window->Pos);
if (!(flags & ImGuiWindowFlags_NoSavedSettings))
MarkSettingsDirty();
}
@ -4177,6 +4200,7 @@ bool ImGui::Begin(const char* name, bool* p_open, const ImVec2& size_on_first_us
// Setup drawing context
window->DC.IndentX = 0.0f + window->WindowPadding.x - window->Scroll.x;
window->DC.GroupOffsetX = 0.0f;
window->DC.ColumnsOffsetX = 0.0f;
window->DC.CursorStartPos = window->Pos + ImVec2(window->DC.IndentX + window->DC.ColumnsOffsetX, window->TitleBarHeight() + window->MenuBarHeight() + window->WindowPadding.y - window->Scroll.y);
window->DC.CursorPos = window->DC.CursorStartPos;
@ -4268,6 +4292,7 @@ bool ImGui::Begin(const char* name, bool* p_open, const ImVec2& size_on_first_us
if (first_begin_of_the_frame)
window->Accessed = false;
window->BeginCount++;
g.SetNextWindowSizeConstraint = false;
// Child window can be out of sight and have "negative" clip windows.
// Mark them as collapsed so commands are skipped earlier (we can't manually collapse because they have no title bar).
@ -4906,6 +4931,15 @@ void ImGui::SetNextWindowSize(const ImVec2& size, ImGuiSetCond cond)
g.SetNextWindowSizeCond = cond ? cond : ImGuiSetCond_Always;
}
void ImGui::SetNextWindowSizeConstraint(const ImVec2& size_min, const ImVec2& size_max, ImGuiSizeConstraintCallback custom_callback, void* custom_callback_user_data)
{
ImGuiContext& g = *GImGui;
g.SetNextWindowSizeConstraint = true;
g.SetNextWindowSizeConstraintRect = ImRect(size_min, size_max);
g.SetNextWindowSizeConstraintCallback = custom_callback;
g.SetNextWindowSizeConstraintCallbackUserData = custom_callback_user_data;
}
void ImGui::SetNextWindowContentSize(const ImVec2& size)
{
ImGuiContext& g = *GImGui;