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const cimgui = @import("dcimgui");
pub const page = @import("widgets/page.zig");
pub const pagelist = @import("widgets/pagelist.zig");
pub const key = @import("widgets/key.zig");
pub const renderer = @import("widgets/renderer.zig");
pub const screen = @import("widgets/screen.zig");
pub const style = @import("widgets/style.zig");
pub const surface = @import("widgets/surface.zig");
pub const terminal = @import("widgets/terminal.zig");
pub const termio = @import("widgets/termio.zig");
/// Draws a "(?)" disabled text marker that shows some help text
/// on hover.
pub fn helpMarker(text: [:0]const u8) void {
cimgui.c.ImGui_TextDisabled("(?)");
if (!cimgui.c.ImGui_BeginItemTooltip()) return;
defer cimgui.c.ImGui_EndTooltip();
cimgui.c.ImGui_PushTextWrapPos(cimgui.c.ImGui_GetFontSize() * 35.0);
defer cimgui.c.ImGui_PopTextWrapPos();
cimgui.c.ImGui_TextUnformatted(text.ptr);
}
/// DetachableHeader allows rendering a collapsing header that can be
/// detached into its own window.
pub const DetachableHeader = struct {
/// Set whether the window is detached.
detached: bool = false,
/// If true, detaching will move the item into a docking position
/// to the right.
dock: bool = true,
// Internal state do not touch.
window_first: bool = true,
pub fn windowEnd(self: *DetachableHeader) void {
_ = self;
// If we started the window, we need to end it.
cimgui.c.ImGui_End();
}
/// Returns null if there is no window created (not detached).
/// Otherwise returns whether the window is open.
pub fn window(
self: *DetachableHeader,
label: [:0]const u8,
) ?bool {
// If we're not detached, we don't create a window.
if (!self.detached) {
self.window_first = true;
return null;
}
// If this is our first time showing the window then we need to
// setup docking. We only do this on the first time because we
// don't want to reset a user's docking behavior later.
if (self.window_first) dock: {
self.window_first = false;
if (!self.dock) break :dock;
const dock_id = cimgui.c.ImGui_GetWindowDockID();
if (dock_id == 0) break :dock;
var dock_id_right: cimgui.c.ImGuiID = 0;
var dock_id_left: cimgui.c.ImGuiID = 0;
_ = cimgui.ImGui_DockBuilderSplitNode(
dock_id,
cimgui.c.ImGuiDir_Right,
0.4,
&dock_id_right,
&dock_id_left,
);
cimgui.ImGui_DockBuilderDockWindow(label, dock_id_right);
cimgui.ImGui_DockBuilderFinish(dock_id);
}
return cimgui.c.ImGui_Begin(
label,
&self.detached,
cimgui.c.ImGuiWindowFlags_NoFocusOnAppearing,
);
}
pub fn header(
self: *DetachableHeader,
label: [:0]const u8,
) bool {
// If we're detached, create a separate window.
if (self.detached) return false;
// Make sure all headers have a unique ID in the stack. We only
// need to do this for the header side because creating a window
// automatically creates an ID.
cimgui.c.ImGui_PushID(label);
defer cimgui.c.ImGui_PopID();
// Create the collapsing header with the pop out button overlaid.
cimgui.c.ImGui_SetNextItemAllowOverlap();
const is_open = cimgui.c.ImGui_CollapsingHeader(
label,
cimgui.c.ImGuiTreeNodeFlags_None,
);
// Place pop-out button inside the header bar
const header_max = cimgui.c.ImGui_GetItemRectMax();
const header_min = cimgui.c.ImGui_GetItemRectMin();
const frame_height = cimgui.c.ImGui_GetFrameHeight();
const button_size = frame_height - 4;
const padding = 4;
cimgui.c.ImGui_SameLine();
cimgui.c.ImGui_SetCursorScreenPos(.{
.x = header_max.x - button_size - padding,
.y = header_min.y + 2,
});
{
cimgui.c.ImGui_PushStyleVarImVec2(
cimgui.c.ImGuiStyleVar_FramePadding,
.{ .x = 0, .y = 0 },
);
defer cimgui.c.ImGui_PopStyleVar();
if (cimgui.c.ImGui_ButtonEx(
">>##detach",
.{ .x = button_size, .y = button_size },
)) {
self.detached = true;
}
}
if (cimgui.c.ImGui_IsItemHovered(cimgui.c.ImGuiHoveredFlags_DelayShort)) {
cimgui.c.ImGui_SetTooltip("Detach into separate window");
}
return is_open;
}
};
pub const DetachableHeaderState = struct {
show_window: bool = false,
/// Internal state. Don't touch.
first_show: bool = false,
};
/// Render a collapsing header that can be detached into its own window.
/// When detached, renders as a separate window with a close button.
/// When attached, renders as a collapsing header with a pop-out button.
pub fn detachableHeader(
label: [:0]const u8,
state: *DetachableHeaderState,
ctx: anytype,
comptime contentFn: fn (@TypeOf(ctx)) void,
) void {
cimgui.c.ImGui_PushID(label);
defer cimgui.c.ImGui_PopID();
if (state.show_window) {
// On first show, dock this window to the right of the parent window's dock.
// We only do this once so the user can freely reposition the window afterward
// without it snapping back to the right on every frame.
if (!state.first_show) {
state.first_show = true;
const current_dock_id = cimgui.c.ImGui_GetWindowDockID();
if (current_dock_id != 0) {
var dock_id_right: cimgui.c.ImGuiID = 0;
var dock_id_left: cimgui.c.ImGuiID = 0;
_ = cimgui.ImGui_DockBuilderSplitNode(
current_dock_id,
cimgui.c.ImGuiDir_Right,
0.3,
&dock_id_right,
&dock_id_left,
);
cimgui.ImGui_DockBuilderDockWindow(label, dock_id_right);
cimgui.ImGui_DockBuilderFinish(current_dock_id);
}
}
defer cimgui.c.ImGui_End();
if (cimgui.c.ImGui_Begin(
label,
&state.show_window,
cimgui.c.ImGuiWindowFlags_NoFocusOnAppearing,
)) contentFn(ctx);
return;
}
// Reset first_show when window is closed so next open docks again
state.first_show = false;
cimgui.c.ImGui_SetNextItemAllowOverlap();
const is_open = cimgui.c.ImGui_CollapsingHeader(
label,
cimgui.c.ImGuiTreeNodeFlags_None,
);
// Place pop-out button inside the header bar
const header_max = cimgui.c.ImGui_GetItemRectMax();
const header_min = cimgui.c.ImGui_GetItemRectMin();
const frame_height = cimgui.c.ImGui_GetFrameHeight();
const button_size = frame_height - 4;
const padding = 4;
cimgui.c.ImGui_SameLine();
cimgui.c.ImGui_SetCursorScreenPos(.{
.x = header_max.x - button_size - padding,
.y = header_min.y + 2,
});
cimgui.c.ImGui_PushStyleVarImVec2(
cimgui.c.ImGuiStyleVar_FramePadding,
.{ .x = 0, .y = 0 },
);
if (cimgui.c.ImGui_ButtonEx(
">>##detach",
.{ .x = button_size, .y = button_size },
)) {
state.show_window = true;
}
cimgui.c.ImGui_PopStyleVar();
if (cimgui.c.ImGui_IsItemHovered(cimgui.c.ImGuiHoveredFlags_DelayShort)) {
cimgui.c.ImGui_SetTooltip("Pop out into separate window");
}
if (is_open) contentFn(ctx);
}
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